{"id":268941,"date":"2025-08-19T03:08:05","date_gmt":"2025-08-18T17:08:05","guid":{"rendered":"https:\/\/science.nasa.gov\/uncategorized\/summary-of-the-2025-gedi-science-team-meeting\/"},"modified":"2025-08-19T03:08:05","modified_gmt":"2025-08-18T17:08:05","slug":"summary-of-the-2025-gedi-science-team-meeting","status":"publish","type":"post","link":"https:\/\/www.vibewire.com.au\/?p=268941","title":{"rendered":"Summary of the 2025 GEDI Science Team Meeting"},"content":{"rendered":"<div id=\"\" class=\" hds-module hds-module-full alignfull wp-block-nasa-blocks-secondary-navigation\">\n<div class=\"hds-secondary-navigation-wrapper z-top width-100 padding-0\">\n<div id=\"\" class=\"hds-secondary-navigation width-full border-bottom-1px text-center hds-color-mode-dark hds-module hds-module-full alignfull wp-block-nasa-blocks-hdsnav\"><button type=\"button\" class=\"hds-secondary-nav-mobile-button display-flex tablet:display-flex desktop:display-none width-full flex-align-center 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style=\"transform: scale(1); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" loading=\"eager\" srcset=\"https:\/\/science.nasa.gov\/wp-content\/uploads\/2024\/05\/eo-meeting-summary-banner.png 1037w, https:\/\/science.nasa.gov\/wp-content\/uploads\/2024\/05\/eo-meeting-summary-banner.png?resize=300,23 300w, https:\/\/science.nasa.gov\/wp-content\/uploads\/2024\/05\/eo-meeting-summary-banner.png?resize=768,60 768w, https:\/\/science.nasa.gov\/wp-content\/uploads\/2024\/05\/eo-meeting-summary-banner.png?resize=1024,80 1024w, https:\/\/science.nasa.gov\/wp-content\/uploads\/2024\/05\/eo-meeting-summary-banner.png?resize=400,31 400w, https:\/\/science.nasa.gov\/wp-content\/uploads\/2024\/05\/eo-meeting-summary-banner.png?resize=600,47 600w, https:\/\/science.nasa.gov\/wp-content\/uploads\/2024\/05\/eo-meeting-summary-banner.png?resize=900,70 900w\" sizes=\"auto, (max-width: 1037px) 100vw, 1037px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"padding-top-5 padding-bottom-3 width-full maxw-full hds-module hds-module-full alignfull wp-block-nasa-blocks-article-intro\">\n<div class=\"width-full maxw-full article-header\">\n<div class=\"margin-bottom-2 width-full maxw-full\">\n<p class=\"label carbon-60 margin-0 margin-bottom-3 padding-0\">31 min read<\/p>\n<h1 class=\"display-48 margin-bottom-2\">Summary of the 2025 GEDI Science Team Meeting<\/h1>\n<\/div>\n<\/div>\n<\/div>\n<p><strong>Introduction<\/strong><\/p>\n<p>The 2025 <a href=\"https:\/\/gedi.umd.edu\/\" rel=\"noopener\">Global Ecosystem Dynamics Investigation<\/a> (GEDI) Science Team Meeting (STM) took place April 1\u20133, 2025 at the University of Maryland, College Park (UMD). Upwards of 60 participants attended in-person, while several others joined virtually by Zoom. The GEDI Mission and Competed Science Team members were in attendance along with the GEDI NASA program manager and various postdoctoral associates, graduate students, collaborators, and data users \u2013 see <strong>Photo<\/strong>. Participants shared updates on the GEDI instrument and data products post-hibernation with the GEDI community. They also shared progress reports on the second Competed Science Team cohort\u2019s projects as well as applications of GEDI data.<\/p>\n<p>This article provides a mission status update and summaries of the presentations given at the STM. Readers who would like to learn more about certain topics can submit specific questions through the GEDI website\u2019s <a href=\"https:\/\/gedi.umd.edu\/contact\/\" rel=\"noopener\">contact form<\/a>.<\/p>\n<div id=\"\" class=\"hds-media hds-module wp-block-image\">\n<div class=\"margin-left-auto margin-right-auto nasa-block-align-inline\">\n<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\">\n<figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-fit \"><a href=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_photo.jpg?w=1440&#038;h=460&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" rel=\"noopener\"><img decoding=\"async\" width=\"1440\" height=\"460\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_photo.jpg?w=1440&#038;h=460&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" class=\"attachment-2048x2048 size-2048x2048\" alt=\"GEDI photo\" style=\"transform: scale(1); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_photo.jpg?w=1440&#038;h=460&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1440w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_photo.jpg?w=300&#038;h=96&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_photo.jpg?w=768&#038;h=245&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_photo.jpg?w=1024&#038;h=327&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_photo.jpg?w=400&#038;h=128&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_photo.jpg?w=600&#038;h=192&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_photo.jpg?w=900&#038;h=288&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_photo.jpg?w=1200&#038;h=383&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w\" sizes=\"auto, (max-width: 1440px) 100vw, 1440px\" \/><\/a><\/figure><figcaption class=\"hds-caption padding-y-2\">\n<div class=\"hds-caption-text p-sm margin-0\"><strong>Photo<\/strong>. Attendees, both in person and virtual, at the 2025 GEDI Science Team meeting.<\/div>\n<div class=\"hds-credits\"><strong>Photo credit<\/strong>: Talia Schwelling<\/div>\n<\/figcaption><\/div>\n<\/div>\n<\/div>\n<p><strong>Mission Status Update: GEDI Up and Running After its Time in Hibernation<\/strong><\/p>\n<p>When the 2023 GEDI STM summary was published in June 2024 \u2013 see archived article, \u201c<a href=\"https:\/\/science.nasa.gov\/science-research\/earth-science\/summary-of-the-2023-gedi-science-team-meeting\/\" rel=\"noopener\">Summary of the 2023 GEDI Science Team Meeting<\/a>\u201d [<em>The Earth Observe<\/em>r, June 18, 2024] \u2013 GEDI had been placed in a temporary state of<em> hibernation<\/em> and moved from the International Space Station\u2019s (ISS) Japanese Experiment Module\u2013Exposed Facility (JEM\u2013EF) Exposed Facility Unit (EFU)-6 to EFU-7 (storage).\u00a0\u00a0 \u00a0<\/p>\n<p>Two years later, as the 2025 GEDI STM took place, the GEDI instrument was back in its original location on EFU-6 collecting high-resolution observations of Earth\u2019s three-dimensional (3D) structure from space.<\/p>\n<p><strong>DAY ONE<\/strong><\/p>\n<p><strong>GEDI Mission and Data Product Status I<\/strong><\/p>\n<p><strong>Ralph Dubayah<\/strong> [UMD\u2014<em>GEDI Principal Investigator (PI)<\/em>] opened the STM with updates on mission status (see previous section) and the development of current and pending GEDI data products.<\/p>\n<p>Following its hibernation on the ISS from March 2023\u2013April 2024, the GEDI mission entered its second extension period. Since re-installation, the instrument\u2019s lasers have been operating nominally, steadily collecting data, increasing coverage, and filling gaps. As of November 27, 2024, GEDI had collected 33 billion Level-2A (L2A) land surface returns, with approximately 12.1 billion passing quality filters. Since the last STM, an additional 1422 new simulated GEDI footprints have been added to GEDI\u2019s forest structure and biomass database (FSBD), which is a database of forest inventory and airborne laser scanning data (ALS) from around the globe that is used for cal\/val of GEDI data. The FSBD now has 27,876 simulated footprints in total \u2013 see <strong>Figure 1<\/strong>. This data will support improved L4A biomass algorithm calibration.<\/p>\n<div id=\"\" class=\"hds-media hds-module wp-block-image\">\n<div class=\"margin-left-auto margin-right-auto nasa-block-align-inline\">\n<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\">\n<figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-fit \"><a href=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-1.png?w=1440&#038;h=581&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" rel=\"noopener\"><img decoding=\"async\" width=\"1440\" height=\"581\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-1.png?w=1440&#038;h=581&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" class=\"attachment-2048x2048 size-2048x2048\" alt=\"GEDI figure 1\" style=\"transform: scale(1); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-1.png?w=1440&#038;h=581&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1440w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-1.png?w=300&#038;h=121&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-1.png?w=768&#038;h=310&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-1.png?w=1024&#038;h=413&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-1.png?w=400&#038;h=161&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-1.png?w=600&#038;h=242&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-1.png?w=900&#038;h=363&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-1.png?w=1200&#038;h=484&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w\" sizes=\"auto, (max-width: 1440px) 100vw, 1440px\" \/><\/a><\/figure><figcaption class=\"hds-caption padding-y-2\">\n<div class=\"hds-caption-text p-sm margin-0\"><strong>Figure 1<\/strong>. Training samples, or simulated footprints, are derived from coincident forest inventory and ALS data. DBT = deciduous broadleaf, EBT = evergreen broadleaf, ENT = evergreen needleleaf, GSW = grass, shrub, woodland.<\/div>\n<div class=\"hds-credits\"><strong>Figure credit<\/strong>: David Minor<\/div>\n<\/figcaption><\/div>\n<\/div>\n<\/div>\n<p>Version 2.1 (V2.1) of GEDI L1B, L2A, L2B, and L4A data products are the latest product releases available for download. This version incorporates post-storage data through November 2024. In January 2025, the team also released the new L4C footprint-level Waveform Structural Complexity Index (WSCI) product using pre-storage data. The upcoming V3.0 release will incorporate pre- and post-storage data that will improve quality filtering, geolocation accuracy, and algorithm performance.<\/p>\n<p>Although GEDI met its L1 mission science requirements before entering hibernation, orbital resonance on the ISS impacted GEDI\u2019s coverage in the tropics. To help address these gaps, the team is exploring data fusion opportunities with other missions \u2013 e.g., <a href=\"https:\/\/science.nasa.gov\/mission\/nisar\/\" rel=\"noopener\">NASA-Indian Space Research Organisation Synthetic Aperture Radar<\/a> (NISAR), the Deutsches Zentrum f\u00fcr Luft- und Raumfahrt\u2019s (DLR \u2013 German Aerospace Center) <a href=\"https:\/\/www.dlr.de\/en\/research-and-transfer\/projects-and-missions\/terrasar-x\" rel=\"noopener\">Terra Synthetic Aperture Radar\u2013X<\/a> (TerraSAR-X) and <a href=\"https:\/\/www.dlr.de\/en\/research-and-transfer\/projects-and-missions\/tandem-x\" rel=\"noopener\">TerraSAR add-on for Digital Elevation Measurement<\/a> (TanDEM-X) missions, and the European Space Agency\u2019s upcoming forest mission \u2013 <a href=\"https:\/\/www.esa.int\/Applications\/Observing_the_Earth\/FutureEO\/Biomass\" rel=\"noopener\">Biomass<\/a>. [<strong>UPDATE<\/strong>: Biomass launched successfully on April 29, 2025 from Europe\u2019s Spaceport in Korou, French Guiana, and NISAR launched July 30, 2025 from the Satish Dhawan Space Centre located on Sriharikota Island\u00a0in India.] \u00a0Additional ongoing mission team efforts include advancing waveform processing, developing gridded products tailored to end-user needs, understanding error and bias, and continuing expansion of the FSBD.<\/p>\n<p>Dubayah concluded by highlighting the steady rise in GEDI-related publications and datasets appearing in high-impact journals, including <em>PNAS<\/em>, <em>Nature<\/em>, and <em>Science<\/em> families. Visit the GEDI website to gain access to a <a href=\"https:\/\/gedi.umd.edu\/science\/publications\/\" rel=\"noopener\">comprehensive list of GEDI-related publications<\/a>.<\/p>\n<p>After hearing general updates from the mission PI, attendees heard more in-depth reports on science data planning, mission operations, and instrument status.<\/p>\n<p><strong>Scott Luthcke<\/strong> [NASA\u2019s Goddard Space Flight Center (GSFC)\u2014<em>GEDI Co-Investigator (Co-I)<\/em>] reported on Science Operations Center activities, including geolocation performance and improvements. He shared that the Science Planning System, which is used to plan GEDI data acquisition locations, has been upgraded to improve targeting capabilities using high-resolution Reference Ground Tracks. The Science Data Processing System also underwent a technical refresh that increased computational and storage capability and has completed processing and delivery of all V2.1 data products, including post-storage data (April\u2013November 2024), to the <a href=\"https:\/\/www.earthdata.nasa.gov\/centers\/lp-daac\" rel=\"noopener\">Land Processes<\/a> and <a href=\"https:\/\/www.earthdata.nasa.gov\/centers\/ornl-daac\" rel=\"noopener\">Oak Ridge National Laboratory<\/a> (ORNL) Distributed Active Archive Centers (DAACs).<\/p>\n<p>Luthcke explained that V2.1 improves on precision orbit determination, precision attitude determination, tracking point modeling, time tags, and oscillator calibration. Looking ahead, V3.0 will enhance range bias calibration, improved pointing bias calibration, and modifications to L1A, L1B, L2A, and L2B products. Luthcke also discussed updates to the L3 data product, which include corrected timing and range bias, improved positioning and elevation, and a wall-to-wall 1-km (0.62-mi) elevation map to be released alongside V3.0.<\/p>\n<p><strong>Tony Scaffardi<\/strong>\u00a0[GSFC\u2014<em>GEDI Mission Director<\/em>] provided an update on the Science and Mission Operations Center since\u00a0its post-hibernation return to science operations on\u00a0June 3, 2024. He addressed various on-orbit events that may have briefly disrupted data collection and reviewed upcoming ISS altitude plans. As of March 2025, each\u00a0of the\u00a0instrument\u2019s three\u00a0lasers\u00a0logged over 22,000 hours in firing mode, collecting more than 20 billion shots each, with\u00a072% of that time directly over land surfaces. As of April 2025, 95,346 hours of science data have been downlinked, averaging 51.21 GB of data per day.<\/p>\n<p><strong>Bryan Blair <\/strong>[GSFC\u2014<em>Deputy PI and Instrument Scientist<\/em>] concluded this section of the meeting with a discussion of GEDI instrument status, reporting that all three lasers are operating nominally and that both the detectors and digitizers continue to perform well. He noted that the laser pulse shapes have remained stable since the mission began, indicating consistent system performance over time. Blair also addressed the inherent challenges of operating in space, such as radiation exposure, and emphasized the importance of designing systems for graceful degradation. A recent firmware update was successfully applied to all three digitizers, and no life-limiting concerns have been identified to date.<\/p>\n<p><strong>Competed Science Team Presentations \u2013 Session I<\/strong><\/p>\n<p><strong>Jim Kellner<\/strong>\u00a0[Brown University\u2014<em>GEDI Co-I<\/em>] kicked off the Competed Science Team (CST) presentations with an overview of his work investigating the role of stratification and quality filtering to improve GEDI data products and the impact of stratification error on prediction. He explained how GEDI quality filtering and aboveground biomass density (AGBD) model selection and prediction rely heavily on stratification by plant functional type (PFT) and geographic world region. Thus, evaluation and improvement of stratification and quality filtering will help maximize the number of usable GEDI shots, some of which are potentially excluded unnecessarily. To support these improvements, Kellner is exploring replacement of the current 1-km (0.62-mi) stratification layer with a 30-m (98-ft) product derived from Landsat and similarly upgrading the 500-m (1640-ft) phenology stratification layer to a 30-m (98-ft) Landsat version.\u00a0These changes aim to improve the L4A footprint-level AGBD estimates in particular, but flow through to the GEDI L4B data product.<\/p>\n<p><strong>Birgit Peterson <\/strong>[United States Geological Survey (USGS), Earth Resources Observation and Science (EROS) Center] presented her research on the decomposition of GEDI waveforms to derive vegetation structure information for 3D fuels and wildfire modeling, emphasizing the importance of consistent and comprehensive information on vegetation status for effective wildland fire management. Canopy structure data, like that provided by GEDI, can play a key role in developing physics-based fire behavior models, such as QUIC-Fire. With study sites in South Dakota, the Sierra Nevada, and dispersed around the southeastern United States, Peterson\u2019s work aims to demonstrate how vegetation structure parameters needed to run the QUIC-Fire model can be derived from GEDI waveform data.<\/p>\n<p><strong>David Roy<\/strong>\u00a0[Michigan State University] shared updates on his CST project leveraging GEDI data to improve understanding of species-specific tropical forest regrowth in central Africa. Focusing on the Mai Ndombe region of the Democratic Republic of the Congo (DRC), the project aims to quantify forest regrowth by integrating GEDI-derived structural data with satellite and airborne laser scanner (ALS) based maps of forest height. Roy emphasized the potential of secondary and recovering forest conservation as a low-cost mechanism for carbon sequestration and climate change mitigation. GEDI data combined with satellite maps provides new opportunities to quantify forest regrowth and carbon sequestration in secondary forests at finer detail, although high species diversity and varying regrowth rates can be complex to assess with remote sensing.\u00a0Roy also presented a\u00a02025 paper validating the GEDI relative height product in the DRC and at two US temperate forest sites with a simple method to improve the GEDI canopy height using digital terrain heights measured by airborne laser scanning (ALS).\u00a0<\/p>\n<p><strong>Perspectives I<\/strong><\/p>\n<p>After the morning CST presentation session, meeting attendees heard the first perspectives presentation from <strong>Amanda Whitehurst <\/strong>[NASA Headquarters (HQ] <em>GEDI Program Scientist and NASA Terrestrial Ecology Program Manager<\/em>]. Whitehurst is new to the GEDI Program Scientist role; she used this opportunity to officially introduce herself to the ST and expressed her enthusiasm for the work ahead\u00a0 She commended the GEDI team on the impressive accomplishments of the mission to date, and spoke about the exciting potential for continued data collection and scientific discovery through the program.<\/p>\n<p><strong>Matteo Pardini<\/strong> [DLR] shared his perspective on the potential of combining synthetic aperture radar (SAR) with lidar data to improve four-dimensional (4D) forest structure mapping. He highlighted DLR\u2019s TerraSAR-X and TanDEM-X missions, which have been acquiring interferometric data since 2007 and 2010, respectively. Both missions are expected to continue acquiring data through 2028. The TanDEM-X Global Digital Elevation Model, covering 150 million km<sup>2<\/sup> (58 million mi<sup>2<\/sup>) with approximately 1-m (3-ft) accuracy, can be used to derive forest height and biomass. The fusion of TanDEM-X and GEDI data can improve biomass estimates \u2013 see <strong>Figure 2<\/strong> \u2013 and help researchers parameterize the relationship between coherence and forest structure. Pardini also previewed the upcoming BIOMASS mission, which will operate at a lower frequency and be able to penetrate vegetation, providing complementary information to the TerraSAR-X and TanDEM-X missions.<\/p>\n<div id=\"\" class=\"hds-media hds-module wp-block-image\">\n<div class=\"margin-left-auto margin-right-auto nasa-block-align-inline\">\n<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\">\n<figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-fit \"><a href=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-2.png?w=1440&#038;h=737&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" rel=\"noopener\"><img decoding=\"async\" width=\"1440\" height=\"737\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-2.png?w=1440&#038;h=737&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" class=\"attachment-2048x2048 size-2048x2048\" alt=\"GEDI figure 2\" style=\"transform: scale(1); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-2.png?w=1440&#038;h=737&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1440w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-2.png?w=300&#038;h=154&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-2.png?w=768&#038;h=393&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-2.png?w=1024&#038;h=524&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-2.png?w=400&#038;h=205&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-2.png?w=600&#038;h=307&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-2.png?w=900&#038;h=461&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-2.png?w=1200&#038;h=614&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w\" sizes=\"auto, (max-width: 1440px) 100vw, 1440px\" \/><\/a><\/figure><figcaption class=\"hds-caption padding-y-2\">\n<div class=\"hds-caption-text p-sm margin-0\"><strong>Figure 2. <\/strong>Biomass estimates over the Amazon basin at 25-m (82-ft) resolution derived using a fusion of data from NASA\u2019s GEDI and DLR\u2019s TanDEM-X missions.<\/div>\n<div class=\"hds-credits\"><strong>Figure credit<\/strong>: Wenlu Qi<\/div>\n<\/figcaption><\/div>\n<\/div>\n<\/div>\n<p><strong>CST Presentations \u2013 Session II<\/strong><\/p>\n<p><strong>Chris Hakkenberg<\/strong><strong>\u00a0<\/strong>[University of California, Los Angeles (UCLA)] opened the second CST presentation session with a discussion on his research using GEDI to characterize fuel structure, burn severity, and post-fire response across the regions of California affected by wildfire. He began by highlighting significant land cover changes\u00a0resulting from wildfires\u00a0in recent years that are visible\u00a0as enormous [greater than 100 km<sup>2 <\/sup>(38 mi<sup>2<\/sup>)] conversions from forest to grass\/scrub\u00a0in the <a href=\"https:\/\/www.usgs.gov\/centers\/eros\/science\/national-land-cover-database\" rel=\"noopener\">National Land Cover Dataset<\/a>. Hakkenberg\u2019s project aims to examine the role of fuel structure in driving fire severity patterns, improve burn severity maps using GEDI for change detection, and characterize post-fire response using data from <a href=\"https:\/\/landsat.gsfc.nasa.gov\/\" rel=\"noopener\">Landsat<\/a> 5, 7, and 8 and GEDI. He noted that while fire behavior is heavily dependent on weather, topography, and fuels \u2013 only fuels can be actively managed. GEDI provides valuable insights into forest fuel structure by measuring canopy volume (total fuel quantities) and vertical continuity (how fire may spread through those\u00a0volumes). Hakkenberg and his team found that vertical fuel continuity metrics were stronger predictors of severity than fuel volume,\u00a0especially\u00a0in extreme weather conditions, and are most closely related to the high-burn severities that can delay long-term recovery.\u00a0Finally, Hakkenberg presented research that combines GEDI and Landsat to improve burn severity assessments, which will be the focus on the next phase of this research project.<\/p>\n<p><strong>Sean Healey<\/strong> [U.S. Forest Service (USFS)\u2014<em>GEDI Co-I<\/em>] presented an overview of the <a href=\"https:\/\/research.fs.usda.gov\/rmrs\/products\/multimedia\/webinars\/obiwan-app-estimating-property-level-carbon-storage-using-nasas\" rel=\"noopener\">Online Biomass Inference using Waveforms and iNventory<\/a> (OBI-WAN) project. OBI-WAN provides globally consistent estimates of biomass and carbon, as well as changes in these estimates over time, for user-defined areas and periods of interest rather than fixed 1-km (0.62-mi) squares. The project leverages GEDI L4A models to predict biomass at the footprint level and uses this dense collection of footprints to create local-level biomass models with Landsat (assuming consistent calibration of Landsat through time). To quantify uncertainty in change estimates, OBI-WAN employs a statistical method called bootstrapping, which can be embedded into customized accounting systems through a powerful programming interface accessed through <a href=\"https:\/\/yang.users.earthengine.app\/view\/obiwan\" rel=\"noopener\">Google Earth Engine<\/a>.<\/p>\n<p><strong>Data Product Status I<\/strong><\/p>\n<p><strong>Michelle Hofton<\/strong>\u00a0[UMD\u2014<em>GEDI Co-I<\/em>] and\u00a0<strong>Sarah Story<\/strong>\u00a0[GSFC] returned to the topic of GEDI data product status. They presented an update on the GEDI L2A product, which includes ground topography and canopy height measurements. Encouragingly, preliminary testing shows that GEDI\u2019s post-storage performance has remained consistent with pre-storage. Hofton explained GEDI observations are compared with high-quality intersections with the <a href=\"https:\/\/lvis.gsfc.nasa.gov\/Home\/index.html\" rel=\"noopener\">Land, Vegetation, and Ice Sensor<\/a> (LVIS) (an airborne lidar) data in order to assess GEDI data quality and accuracy. \u00a0She highlighted the use of<em> bingos <\/em>\u2013 pairs of GEDI waveforms believed to be spatially coincident in vegetated areas \u2013 as a valuable tool for assessing geolocation and waveform errors as well as algorithm performance. As of December 2024, more than one million bingos had been collected. Hofton and Story concluded with a preview of anticipated updates to the L2A product for V3.0, including new quality flags for data cleaning and a refined algorithm selection approach.\u00a0<\/p>\n<p><strong>John Armston<\/strong>\u00a0[UMD\u2014<em>GEDI Co-I<\/em>] presented on GEDI L2B data, which provides gridded footprint-level [25-m (82-ft) resolution] metrics such as canopy cover (see <strong>Figure 3<\/strong>), plant area index (PAI), plant area volume density (PAVD), and foliage height diversity (FHD). Waveform analysis will remain largely unchanged from V2.0. He shared that the upcoming V3.0 release will differ from V2.0 in that it will use GEDI-derived canopy-ground reflectance ratios \u2014 rather than values derived from NASA LVIS \u2014 to estimate canopy cover, thus allowing for spatial variability. Waveform analysis will remain largely unchanged from V2.0. Armston also presented 1-km (0.62-mi) leaf-on and leaf-off gridded L2B canopy cover fraction maps using both pre- and post-storage data (April 2019\u2013November 2024), explaining how post-storage data were used to fill gaps. Additionally, the mission team has mapped GEDI canopy cover distributions using a H3-indexing API developed by\u00a0<strong>Tiago de Conto<\/strong>\u00a0[UMD], which are being used to improve GEDI L2A algorithms for ground detection. V3.0 will offer a\u00a0more direct measure of canopy structure to complement L2A\u00a0relative height metrics by improving quality flags and including relative canopy height metrics. Finally, the team presented progress on the independent validation of GEDI L2B\u00a0V3.0 algorithms and products using the GEDI FSBD and NASA LVIS campaign data from Costa Rica, Gabon, French Guiana and the United States.<\/p>\n<div id=\"\" class=\"hds-media hds-module wp-block-image\">\n<div class=\"margin-left-auto margin-right-auto nasa-block-align-inline\">\n<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\">\n<figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-fit \"><a href=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-3.png?w=1440&#038;h=1191&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" rel=\"noopener\"><img decoding=\"async\" width=\"1440\" height=\"1191\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-3.png?w=1440&#038;h=1191&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" class=\"attachment-2048x2048 size-2048x2048\" alt=\"GEDI figure 3\" style=\"transform: scale(1); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-3.png?w=1440&#038;h=1191&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1440w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-3.png?w=300&#038;h=248&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-3.png?w=768&#038;h=635&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-3.png?w=1024&#038;h=847&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-3.png?w=400&#038;h=331&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-3.png?w=600&#038;h=496&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-3.png?w=900&#038;h=744&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-3.png?w=1200&#038;h=993&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w\" sizes=\"auto, (max-width: 1440px) 100vw, 1440px\" \/><\/a><\/figure><figcaption class=\"hds-caption padding-y-2\">\n<div class=\"hds-caption-text p-sm margin-0\"><strong>Figure 3<\/strong>. GEDI L2B leaf-on canopy cover fraction map derived from data obtained April 2019\u2013October 2024.<\/div>\n<div class=\"hds-credits\"><strong>Figure credit<\/strong>: John Armston<\/div>\n<\/figcaption><\/div>\n<\/div>\n<\/div>\n<p><strong>Jamis Bruening<\/strong> [UMD] shared the final data product update of the day. He discussed GEDI\u2019s L4B gridded aboveground biomass density (AGBD) product, which is a 1-km (0.62-mi) raster dataset representing area-level estimates of mean AGBD and associated uncertainty across the mission\u2019s range of observation. GEDI\u2019s L4B estimates are derived from the footprint-level L4A AGBD predictions through one of two statistical modes of inference. Currently, hybrid estimation is used to generate L4B. This approach uses GEDI data as the sole input and requires at least two GEDI tracks in a 1-km (0.62-mi) grid cell to produce a mean estimate. The hybrid estimator also provides a standard error, accounting for both model variance in the L4A predictions and GEDI\u2019s sampling uncertainty. To address gaps in GEDI\u2019s coverage where hybrid estimates cannot be produced, the team has begun implementing an alternative inference mode, called generalized hierarchical model-based (GHMB) estimation. GHMB incorporates auxiliary imagery, such as Landsat, SAR, and GEDI\u2019s L4A predictions, to infer\u00a0mean\u00a0biomass\u00a0and its standard error.\u00a0Although the addition of post-storage data has increased GEDI\u2019s coverage, GHMB remains essential for producing a complete, gap-free 1-km (0.62-mi) AGBD map. Both hybrid and GHMB approaches will soon be used together to generate a global, gap-free L4B product. Users can expect the release of V3.0 L4B estimates \u2013 featuring hybrid and GHMB models of biomass inference using both pre- and post-storage data \u2013 later in 2025.<strong><\/strong><\/p>\n<p><strong>What\u2019s Next?<\/strong><\/p>\n<p>Day one concluded with\u00a0<strong>John Armston<\/strong>, who\u00a0presented on the potential new satellite laser altimetry mission called\u00a0<a href=\"https:\/\/edge.ucsd.edu\/\"  rel=\"noreferrer noopener\">Earth Dynamics Geodetic Explorer<\/a> (EDGE), which was competitively selected for a Phase A Concept Study under NASA\u2019s Earth Systems Explorer Announcement of Opportunity.\u00a0If selected, EDGE would launch in 2030 and operate for a two-year mission, providing\u00a0a critical link between current and future satellite laser altimetry missions.<\/p>\n<p>Armston explained that EDGE addresses two of the <em>targeted observables<\/em> identified in the 2017 Earth Science Decadal Survey\u00a0\u2013 terrestrial ecosystem structure and ice elevation. It provides a\u00a0dramatic improvement in coverage and resolution over current active missions by operating in a Sun-synchronous orbit that will enable the direct measurement of change in the three-dimensional (3D) structure of vegetation and the surface topography of ice\u00a0at the spatial and temporal scales needed to observe the driving processes.\u00a0EDGE will provide\u00a0fine-scale detail of ecosystem structure in some of the world\u2019s most critical and challenging-to-quantify regions, including the boreal,\u00a0transforming the field\u2019s understanding of global terrestrial ecosystem structure and its response to natural and anthropogenic change\u00a0over all\u00a0of Earth\u2019s wooded ecosystems.\u00a0<\/p>\n<p><strong>DAY TWO<\/strong><\/p>\n<p><strong>Data Product Status II\/Extended and Demonstrative Products I<\/strong><\/p>\n<p><strong>Jim Kellner <\/strong>began day two with an L4A footprint-level AGBD product update. His presentation focused on current product status and planned evaluation of and improvements to the L4A algorithm. Since the\u00a0last STM, L4A V2.1 was updated to include data through MW 311 (through November 2024) and is now available to end\u00a0users. V3.0, along with an updated Algorithm Theoretical Basis Document (ATBD), is expected later in 2025. The revised ATBD will outline enhancements to the waveform simulator, quality filtering, stratification, and model selection thanks in part to the availability of on-orbit data. V3.0 will also benefit from the ingestion of approximately 35% more simulated waveforms that passed quality assurance and quality control in the FSBD, significantly expanding training data coverage, particularly in Africa and North America. Kellner noted that users should be aware of key differences between L2 and L4 quality flags; L4 flags account for factors such as sensitivity, water presence, urban conditions, and phenology. Additionally, updates to the selected models may lead to changes in AGBD estimates, which will be more clearly communicated in the V 3.0 release. Comparing pre- and post-storage data, Kellner and his team found that AGBD estimates remain stable across both periods. He encouraged users to review the updated ATBD upon release to fully understand the changes and their implications.<\/p>\n<p><strong>Tiago de Conto<\/strong>\u00a0[UMD] presented the new GEDI L4C WSCI product, which was released in May 2024 and available through the ORNL DAAC \u2013 see <strong>Figure 4<\/strong>. This footprint-level metric captures the amount and variability of canopy structure in 3D space, reflecting the richness of structural information underlying any given GEDI observation. It synthesizes multiple structural attributes into a single metric and incorporates elements of both vertical and horizontal variability. WSCI models are trained at the PFT level (i.e., deciduous broadleaf trees, evergreen broadleaf trees, evergreen needleleaf trees, and the combination of grasslands, shrubs, and woodlands) using crossovers of GEDI and airborne lidar point clouds. While WSCI tends to scale with canopy height, the relationship varies across biomes. Looking ahead, de Conto previewed forthcoming WSCI\u2013SAR fusion work designed to produce wall-to-wall maps that are suitable for applications, such as change detection. Early fusion results using data from the European Union\u2019s Copernicus <a href=\"https:\/\/www.esa.int\/Applications\/Observing_the_Earth\/Copernicus\/Sentinel-1\" rel=\"noopener\">Sentinel-1<\/a> (a synthetic aperture radar mission) and the Japan Aerospace Exploration Agency\u2019s (JAXA) <a href=\"https:\/\/www.earthdata.nasa.gov\/data\/instruments\/palsar\" rel=\"noopener\">Advanced Land Observing Satellite Phased Array L-band Synthetic Aperture Radar<\/a> (ALOS-PALSAR) show stable prediction performance across different biomes and time periods as well as consistent performance against airborne lidar wall-to-wall reference data.<\/p>\n<div id=\"\" class=\"hds-media hds-module wp-block-image\">\n<div class=\"margin-left-auto margin-right-auto nasa-block-align-inline\">\n<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\">\n<figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-fit \"><a href=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-4_2.png?w=1440&#038;h=599&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" rel=\"noopener\"><img decoding=\"async\" width=\"1440\" height=\"599\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-4_2.png?w=1440&#038;h=599&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" class=\"attachment-2048x2048 size-2048x2048\" alt=\"GEDI figure 4\" style=\"transform: scale(1); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-4_2.png?w=1440&#038;h=599&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1440w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-4_2.png?w=300&#038;h=125&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-4_2.png?w=768&#038;h=319&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-4_2.png?w=1024&#038;h=426&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-4_2.png?w=400&#038;h=166&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-4_2.png?w=600&#038;h=250&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-4_2.png?w=900&#038;h=374&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-4_2.png?w=1200&#038;h=499&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w\" sizes=\"auto, (max-width: 1440px) 100vw, 1440px\" \/><\/a><\/figure><figcaption class=\"hds-caption padding-y-2\">\n<div class=\"hds-caption-text p-sm margin-0\"><strong>Figure 4.<\/strong> The global frequency distribution of GEDI L4C Waveform Structural Complexity Index.<\/div>\n<div class=\"hds-credits\"><strong>Figure credit<\/strong>: Tiago de Conto<\/div>\n<\/figcaption><\/div>\n<\/div>\n<\/div>\n<p><strong>Paul May<\/strong>\u00a0[South Dakota School of Mines and Technology] presented his work predicting interpolated waveforms, along with their associated uncertainties, over USDA <a href=\"https:\/\/research.fs.usda.gov\/programs\/fia\" rel=\"noopener\">Forest Inventory and Analysis<\/a> (FIA) field plots across the contiguous United States (CONUS). This project aims to develop regression models that convert GEDI\u2019s waveform data into measurements of key forest attributes and enhance monitoring capabilities for a variety of applications. The resulting data product \u2013 GEDI-FIA Fusion: Training Lidar Models to Estimate Forest Attributes \u2013 was released June 2025 and is publicly available through the\u00a0<a href=\"https:\/\/daac.ornl.gov\/cgi-bin\/dsviewer.pl?ds_id=2417\"  rel=\"noreferrer noopener\">ORNL DAAC<\/a>.<\/p>\n<p><strong>Sean Healey<\/strong> presented ongoing work on the GEDI L4D Imputed Waveform product, led by postdoctoral researcher <strong>Eugene Seo<\/strong> [Oregon State University]. This product aims to generate a wall-to-wall 30-m (98-ft) resolution map of GEDI waveforms across the globe in 2023. To achieve this, Seo, Healey, and <strong>Zhiqiang Yang<\/strong> [USFS] are using a k-nearest neighbor (k-NN) imputation approach to address areas without GEDI observations. The model operates at a 10-km (6-mi) scale but draws neighbors from a surrounding 30\u00d730 km (19\u00d719 mi) window. The resulting 30-m (98-ft) resolution imputed waveform map is aligned with Landsat data from 2023. Users can expect the release of the L4D product later in 2025.<\/p>\n<p><strong>GEDI Applications and Perspectives II<\/strong><\/p>\n<p><strong>Neha Hunka<\/strong> [European Space Agency] shared her work using GEDI to fill gaps in the <a href=\"https:\/\/redd.unfccc.int\/uploads\/2_239_sudan-national_forests_inventory2020.pdf\" rel=\"noopener\">Republic of Sudan\u2019s National Forest Inventory (<\/a>NFI) in support of their Forest Reference Level (FRL) report to the United Nations Framework Convention on Climate Change (UNFCCC). Using existing NFI data for calibration, Hunka and colleagues developed a geostatistical model-based approach that interpolates between NFI sample units, allowing predictions of AGBD to be made in areas of interest \u2013 see <strong>Figure 5<\/strong>. (Hunka was lead author on a 2025 paper in <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0034425724005832\" rel=\"noopener\"><em>Remote Sensing of Environment<\/em><\/a> that describes a similar approach to what she described in this presentation.) UNFCCC called for the modeling approach to be transparent and replicable. Hunka emphasized the importance of access to and preparation of covariate data and called for greater capacity-building and knowledge-transfer support to help other countries adopt GEDI in their reporting. Sudan\u2019s submission marks the first time GEDI data has been used in an FRL report.<\/p>\n<div id=\"\" class=\"hds-media hds-module wp-block-image\">\n<div class=\"margin-left-auto margin-right-auto nasa-block-align-inline\">\n<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\">\n<figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-fit \"><a href=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-5.png?w=1440&#038;h=1044&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" rel=\"noopener\"><img decoding=\"async\" width=\"1440\" height=\"1044\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-5.png?w=1440&#038;h=1044&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" class=\"attachment-2048x2048 size-2048x2048\" alt=\"GEDI figure 5\" style=\"transform: scale(1); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-5.png?w=1440&#038;h=1044&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1440w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-5.png?w=300&#038;h=218&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-5.png?w=768&#038;h=557&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-5.png?w=1024&#038;h=742&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-5.png?w=400&#038;h=290&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-5.png?w=600&#038;h=435&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-5.png?w=900&#038;h=653&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-5.png?w=1200&#038;h=870&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w\" sizes=\"auto, (max-width: 1440px) 100vw, 1440px\" \/><\/a><\/figure><figcaption class=\"hds-caption padding-y-2\">\n<div class=\"hds-caption-text p-sm margin-0\"><strong>Figure 5<\/strong>. A geostatistical model-based approach uses data from the Republic of Sudan\u2019s National Forest Inventory (NFI) for calibration and interpolates between NFI sample units, allowing predictions of aboveground biomass density where desired.<\/div>\n<div class=\"hds-credits\"><strong>Figure credit<\/strong>: Neha Hunka<\/div>\n<\/figcaption><\/div>\n<\/div>\n<\/div>\n<p>Forests cover about 30% of Earth\u2019s land area, store over 80% of terrestrial biomass and carbon, and absorb around 30% of anthropogenic carbon dioxide (CO\u2082) emissions. While storing carbon in forests can help mitigate carbon emissions, deforestation, disturbances, shifting global economy, and low confidence in forest carbon credits add risk and uncertainty to this strategy. By monitoring forest biomass, some of these risks can be alleviated. <strong>Stuart Davies<\/strong> [Smithsonian Institution] joined the STM to present his work on <a href=\"https:\/\/geo-trees.org\/\" rel=\"noopener\">GEO-TREES<\/a>, a global forest biomass reference system aiming to provide high-quality, publicly available ground data from a network of long-term forest inventory sites to improve biomass mapping on the global scale. Despite many Earth observing (EO) missions focused on forest biomass, a lack of standardized ground reference data has hindered accurate validation. GEO-TREES addresses this need, by fostering collaboration between carbon monitoring, biodiversity research, and EO communities. The project includes 100 core sites and 200 supplementary sites across tropical and temperate regions, selected to represent environmental and human-use gradients, with greater emphasis on sampling in the tropics. Each core site follows <a href=\"https:\/\/ceos.org\/\" rel=\"noopener\">Committee on Earth Observation Satellites<\/a> (CEOS) protocol and includes three types of measurements: forest plot inventory plot, terrestrial laser scanning, and ALS.<\/p>\n<p><strong>CST Presentations \u2013 Session III<\/strong><\/p>\n<p><strong>Atticus Stovall<\/strong> [GSFC] shared first-year findings from his research on post-fire disturbance forest recovery in Mediterranean ecosystems \u2013 specifically Spain and Portugal \u2013 where the frequency and intensity of wildfires have significantly increased in the 21st century. Using Iberian Forest Inventory ALS data and GEDI footprint data, Stovall and his team showed that GEDI can be used to assess post-fire change as well as evaluate degradation patterns from increasing fire recurrence and intensity. Stovall shared examples demonstrating the use of GEDI to detect both immediate fire effects as well as recovery after disturbance, including stand-replacement and understory clearing. By overlaying disturbance maps with GEDI data, the team observed that recovery rates differ across height class. Looking forward, they plan to investigate how recovery rates vary across environmental gradients and incorporate field plot data to validate their findings.<\/p>\n<p><strong>KC Cushman<\/strong> [ORNL] presented on biomass calibration and validation (cal\/val) activities for the <a href=\"https:\/\/nisar.jpl.nasa.gov\/\" rel=\"noopener\">NISAR mission<\/a>, which launched in July 2025. She outlined the general approach to the NISAR biomass algorithm, which uses multiple observations from NISAR every year to produce annual biomass estimates at 1-ha (0.004 mi<sup>2<\/sup>) resolution. Cal\/val efforts will use ALS to link sparse field data to larger landscapes with estimates at two or more sites in 15 different ecoregions. NISAR has supported cal\/val field plot data collection in Spain, South Africa, and various <a href=\"https:\/\/www.neonscience.org\/\" rel=\"noopener\">National Ecological Observatory Network<\/a> (NEON) sites in addition to ALS campaigns at Agua Salud, Panama, near the Los Amigos Biological Station, Peru, in the Chaco ecosystem, Argentina, and near Madrid, Spain.<\/p>\n<p><strong>Chi Chen<\/strong>\u00a0[Rutgers University] presented his work exploring vertical acclimation of vegetation canopy structure and photosynthetic activities using GEDI data. Chen\u2019s research aims to generate gap-free, high-temporal-frequency canopy profile data and to develop a novel framework that integrates GEDI observations into a multi-layer canopy process model.\u00a0By training a random forest model with spatially discontinuous GEDI PAVD profiles and multiple features, e.g., multiband spectral reflectance, tree height, and forest type, Chen and his team successfully estimated spatially continuous PAI profiles across different canopy heights.\u00a0The team cross-validated their predicted PAI with GEDI PAI, NEON PAI, and LAI measurements from the <a href=\"https:\/\/modis.gsfc.nasa.gov\/\" rel=\"noopener\">Moderate Resolution Imaging Spectroradiometer<\/a> (MODIS) instrument on NASA\u2019s <a href=\"https:\/\/terra.nasa.gov\/\" rel=\"noopener\">Terra<\/a> and <a href=\"https:\/\/aqua.nasa.gov\/\" rel=\"noopener\">Aqua<\/a> platforms.\u00a0These data could be used to study seasonal variation in different canopy heights. Using a Global Multilayer Canopy OPTimization (GMC-OPT) model, they also found that GEDI-informed data has the potential to identify the vertical position of \u201cnet\u201d seasonal leaf turnover \u2013 \u00a0ultimately improving the accuracy of estimates of carbon and water fluxes.<\/p>\n<p><strong>CST Presentations \u2013 Session IV<\/strong><\/p>\n<p><strong>Marcos Longo<\/strong>\u00a0[Lawrence Berkeley National Laboratory (LBNL) in transition to Brazilian National Institute for Space Research (INPE)] and his team presented a proposed project that integrates GEDI data with process-based models to assess the impact of wildfires on forest structure, recovery, and ecosystem function. As western US forests face increasing wildfire risk due to drier climates, more human ignitions, and a legacy of fire suppression, changes in forest structure, composition, and function are likely to become more detectable over time. This project, under the leadership of\u00a0<strong>Robinson Negron Juarez<\/strong>\u00a0[University of California, Irvine and LBNL\u2014<em>PI<\/em>] aims to quantify biomass changes in mixed conifer forests across California, Oregon, and Washington using both ALS and GEDI data. The team plans to use GEDI L2A and L2B data to assess immediate fire impacts on forest structure, investigate post-fire forest recovery, and establish relationships between forest structure and fire intensity\/severity. This information will inform process-based models \u2013 e.g., the U.S. Department of Energy\u2019s <a href=\"https:\/\/eesm.science.energy.gov\/technical-highlights\/fates-e3sm-functionally-assembled-terrestrial-ecosystem-simulator\" rel=\"noopener\">Functionally Assembled Terrestrial Ecosystem Simulator<\/a> (FATES) \u2013 and support a better understanding of forest resilience under fire disturbance regime changes.<\/p>\n<p><strong>Ovidiu Csillik<\/strong> [Wake Forest University] presented work using GEDI and ALS to investigate biomass and structural changes in tropical forests. The work, conducted with <strong>Michael Keller<\/strong> [NASA\/ Jet Propulsion Laboratory (JPL), USFS\u2014<em>PI<\/em>], aims to use models to quantify changes in tropical forest biomass and evaluate understanding of topical forest productivity drivers. The project will use ALS data from over the Brazilian Amazon and other sites in Brazil, Gabon, French Guiana, Costa Rica, Mexico, and Borneo alongside GEDI data over pantropical regions around the globe. Csillik and Keller are currently conducting ALS\u2013ALS and GEDI\u2013GEDI comparisons, and are planning to estimate aboveground biomass change from ALS\u2013ALS, ALS\u2013GEDI, and GEDI\u2013GEDI comparisons at both regional and pantropical scales from 2008\u20132026.<\/p>\n<p><strong>Zhenpeng Zuo<\/strong> [Boston University (BU)] presented his team\u2019s research, led by <strong>Ranga Myneni<\/strong> [BU\u2014<em>PI<\/em>], using mechanistic model-GEDI integration to map potential canopy top height (pCTH) and inform forest restoration planning. Predicting restoration potential is challenging, as empirical, deep-learning, and mechanistic methods vary in their accuracy, interpretability, and spatial detail. This project uses a mechanistic model based on water use and supply equilibrium, calibrated using GEDI canopy height metrics, to predict pCTH. The team found this approach produced robust pCTH predictions and shows that the Eastern US has vast restorable areas. Future work will expand to dynamic modeling to incorporate disturbance risks and effects under different climate scenarios.<\/p>\n<p><strong>DAAC Reports<\/strong><\/p>\n<p><strong>Rupesh Shrestha<\/strong> [ORNL DAAC] presented the status of GEDI L3 and L4 datasets at the ORNL DAAC \u2013 see <strong>Figure 6<\/strong>. Since the 2023 STM, three new datasets have been released: L4B (country-level summaries of aboveground biomass), L4C (footprint level waveform structural complexity index), and a GEDI-FIA (fusion dataset for training lidar models to forest attributes). In total, almost 34,000 unique users have downloaded GEDI L3 and L4A-C data 13,770,648 times, with L4A being the most popular at 13.1 million downloads. As of April 30, 2025, all GEDI footprint-level datasets from L1\u2013L4 are available with data through mission week 311 (November 2024), besides L4C. Users can look forward to a GEDI L4D Imputation Dataset later in 2025 along with the much-anticipated V3.0 GEDI data product release. All levels of GEDI data can now be accessed in one place through the NASA Earthdata <a href=\"https:\/\/search.earthdata.nasa.gov\/\" rel=\"noopener\">Search<\/a> and <a href=\"https:\/\/www.earthdata.nasa.gov\/data\/catalog\" rel=\"noopener\">Data Catalog<\/a>. In addition to the data products themselves, <a href=\"https:\/\/ornldaac.github.io\/gedi_tutorials\/docs\/services.html\" rel=\"noopener\">data tools and services<\/a>, <a href=\"https:\/\/daac.ornl.gov\/cgi-bin\/project_citations.pl?pr=40\" rel=\"noopener\">publications citing GEDI data<\/a> and <a href=\"https:\/\/ornldaac.github.io\/gedi_tutorials\/README.html\" rel=\"noopener\">GEDI data tutorials and workshops<\/a> can be found at the ORNL DAAC website. The ORNL DAAC provides data user support through the <a href=\"https:\/\/forum.earthdata.nasa.gov\/viewforum.php?f=7\" rel=\"noopener\">Earthdata Forum<\/a>, or via their email <a href=\"mailto:uso@daac.ornl.gov\">uso@daac.ornl.gov<\/a>.<\/p>\n<div id=\"\" class=\"hds-media hds-module wp-block-image\">\n<div class=\"margin-left-auto margin-right-auto nasa-block-align-inline\">\n<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\">\n<figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-fit \"><a href=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-6.png?w=1440&#038;h=759&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" rel=\"noopener\"><img decoding=\"async\" width=\"1440\" height=\"759\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-6.png?w=1440&#038;h=759&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" class=\"attachment-2048x2048 size-2048x2048\" alt=\"GEDI figure 6\" style=\"transform: scale(1); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-6.png?w=1440&#038;h=759&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1440w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-6.png?w=300&#038;h=158&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-6.png?w=768&#038;h=405&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-6.png?w=1024&#038;h=540&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-6.png?w=400&#038;h=211&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-6.png?w=600&#038;h=316&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-6.png?w=900&#038;h=474&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-6.png?w=1200&#038;h=633&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w\" sizes=\"auto, (max-width: 1440px) 100vw, 1440px\" \/><\/a><\/figure><figcaption class=\"hds-caption padding-y-2\">\n<div class=\"hds-caption-text p-sm margin-0\"><strong>Figure 6<\/strong>. GEDI L3 and L4B data projected on NASA WorldView\/GIBS API. Explore the program <a href=\"https:\/\/go.nasa.gov\/45PAR0x\" rel=\"noopener\">here<\/a>.<\/div>\n<div class=\"hds-credits\"><strong>Figure credit:<\/strong> Rupesh Shrestha<\/div>\n<\/figcaption><\/div>\n<\/div>\n<\/div>\n<p><strong>Jared Beck<\/strong> [Land Processes Distributed Active Archive Center (LP DAAC)] presented on GEDI data products at the LP DAAC, a USGS\u2013NASA partnership that archives and distributes lower-level GEDI products (GEDI L1B, L2A, and L2B). The LP DAAC has distributed over seven petabytes of GEDI data so far, and is now exclusively distributing GEDI data through NASA\u2019s Earth Data Cloud. GEDI L2A is the most popular of the products in terms of terabytes of distribution. Like the ORNL DAAC, data user support also flows through the NASA Earthdata Forum. Tutorials can be found on <a href=\"https:\/\/github.com\/nasa\/GEDI-data-resources\" rel=\"noopener\">GitHub<\/a>. All levels of GEDI data can now be accessed in one place through the NASA Earthdata search and data catalog options.<\/p>\n<p><strong>GEDI Extended and Demonstrative Products II<\/strong><\/p>\n<p><strong>Scott Goetz<\/strong> [NAU] discussed his team\u2019s research leveraging GEDI data for biodiversity applications, emphasizing its potential to help improve species distribution models and the high value of understanding forest structure for conservation assessments. He highlighted a 2022 <a href=\"https:\/\/www.nature.com\/articles\/s41559-022-01915-8\" rel=\"noopener\">Nature Ecology &#038; Evolution article<\/a> showing that forests with higher structural integrity and cover reduced the extinction risk for over 16,000 threatened or declining species. Another 2023 study in <a href=\"https:\/\/www.nature.com\/articles\/s41586-023-06410-z\" rel=\"noopener\"><em>Nature<\/em><\/a> demonstrated how biodiversity indicators, such as habitat cover, canopy structure, and human pressures, can influence the effectiveness of protected areas. In order to have a wider variety of gridded products to work with for species distribution models, <strong>Pat Burns<\/strong> [NAU], Chris Hakkenberg, and Goetz developed the <a href=\"https:\/\/daac.ornl.gov\/VEGETATION\/guides\/GEDI_HighQuality_Shots_Rasters.html\" rel=\"noopener\">Gridded GEDI Vegetation Structure Metrics and Biomass Density at Multiple Resolutions<\/a> product that has been released through the ORNL DAAC and Google Earth Engine along with a data descriptor paper published in a <a href=\"https:\/\/www.nature.com\/articles\/s41597-024-03668-4\" rel=\"noopener\"><em>Nature Scientific Data<\/em><\/a> paper \u2013 see <strong>Figure 7<\/strong>.<em> <\/em>Burns elaborated that, relative to fusion products, gridded GEDI products performed better when measuring structure, especially in the understory. The team is now comparing species distribution models in mainland Southeast Asia using fusion versus solely GEDI data.<\/p>\n<div id=\"\" class=\"hds-media hds-module wp-block-image\">\n<div class=\"margin-left-auto margin-right-auto nasa-block-align-inline\">\n<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\">\n<figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-fit \"><a href=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-7.png?w=1440&#038;h=565&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" rel=\"noopener\"><img decoding=\"async\" width=\"1440\" height=\"565\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-7.png?w=1440&#038;h=565&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" class=\"attachment-2048x2048 size-2048x2048\" alt=\"GEDI figure 7\" style=\"transform: scale(1); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-7.png?w=1440&#038;h=565&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1440w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-7.png?w=300&#038;h=118&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-7.png?w=768&#038;h=301&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-7.png?w=1024&#038;h=402&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-7.png?w=400&#038;h=157&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-7.png?w=600&#038;h=235&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-7.png?w=900&#038;h=353&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/esd\/earth-observer\/2025\/2025-summer\/gedi\/GEDI_figure-7.png?w=1200&#038;h=471&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w\" sizes=\"auto, (max-width: 1440px) 100vw, 1440px\" \/><\/a><\/figure><figcaption class=\"hds-caption padding-y-2\">\n<div class=\"hds-caption-text p-sm margin-0\"><strong>Figure 7<\/strong>. GEDI mean foliage height diversity (FHD) map using shots from April 2019 to March 2023 at 6-km (4.7-mi) spatial resolution. Red boxes indicate the approximate location of airborne lidar used for intercomparison. Three insets show GEDI mean FHD at finer spatial resolution [1\u2009km (0.62 mi)] as well as more detailed airborne lidar coverage (red polygons). From left to right the insets show: Sonoma County, California, Coconino National Forest, Arizona, and Sumatra\/Borneo.<\/div>\n<div class=\"hds-credits\"><strong>Figure credit:<\/strong> From Patrick Burns et al (2024) <a href=\"https:\/\/www.nature.com\/articles\/s41597-024-03668-4\" rel=\"noopener\"><em>Nature Scientific Data<\/em><\/a><\/div>\n<\/figcaption><\/div>\n<\/div>\n<\/div>\n<p><strong>Perspectives III<\/strong><\/p>\n<p>STM attendees concluded day two with a perspective talk from <strong>Marc Simard<\/strong> [JPL], who showcased a range of studies demonstrating diverse applications of GEDI data, opportunities for its improvement, and potential for informing future scientific research. Drawing on his own work, Simard shared examples of using GEDI data for cal\/val of global Digital Elevation Measurement (DEM) and Digital Terrain Model (DTM), mapping global mangrove heights, monitoring forest growth, and analyzing hydrological processes. In more detail, he explained how he led the development of a <a href=\"https:\/\/www.nature.com\/articles\/s41597-024-04213-z\" rel=\"noopener\">12-m (39-ft) spatial resolution global mangrove height product<\/a> using GEDI and TanDEM-X data. Additionally, he discussed a study evaluating tree growth rates in the Laurentides Wildlife Reserve in Quebec, Canada using both GEDI and ALS. The analysis revealed an average growth rate of approximately 32 \u00b123 cm (12 \u00b19 in) per year. Finally, he presented a paper under review examining water level detection and hydrological conditions in coastal regions using GEDI alongside Ice, Cloud, and land Elevation Satellite 2 (ICESat-2) data. In closing, Simard emphasized that GEDI datasets can help identify critical data and knowledge gaps, guiding the development of new missions \u2013 e.g., the <a href=\"https:\/\/science.nasa.gov\/earth-science\/decadal-surveys\/decadal-stv\/\" rel=\"noopener\">Surface Topography and Vegetation<\/a> (STV) mission concept called for in the 2017 Earth Science Decadal Survey report. As described in the S<a href=\"https:\/\/science.nasa.gov\/wp-content\/uploads\/2023\/06\/STV_Study_Report_20210622.pdf?emrc=5b2edb\" rel=\"noopener\">TV Study Team Report<\/a>, the mission would focus on elevation and vertical structure to study the solid Earth, cryosphere, vegetation structure, hydrology, and coastal geomorphology.<\/p>\n<p><strong>DAY THREE<\/strong><\/p>\n<p><strong>CST Presentations \u2013 Session V<\/strong><\/p>\n<p><strong>Jody Vogeler<\/strong> [Colorado State University] opened the final CST presentation session with an overview of her research using GEDI data fusions to characterize post-fire landscapes and understand habitat refugia for the threatened Canada lynx (<em>Lynx canadensis<\/em>). This project builds on her team\u2019s <a href=\"https:\/\/www.frontiersin.org\/journals\/remote-sensing\/articles\/10.3389\/frsen.2023.1196554\/full\" rel=\"noopener\">phase-I work<\/a>, which produced 30-m (98-ft) resolution gridded GEDI fusion <a href=\"https:\/\/daac.ornl.gov\/cgi-bin\/dsviewer.pl?ds_id=2236\" rel=\"noopener\">maps<\/a> across six Western U.S. states to support habitat and diversity applications related to cavity-nesting birds, small mammals, and carnivore\u2013prey relationships. The team is now focusing on validating and improving their GEDI fusion products within post-disturbance landscapes, specifically post-fire. Using this data, Vogeler and her team aim to better understand how post-fire structural information from GEDI improves their ability to understand lynx behavior\u2013habitat relationships across early post-fire landscapes. This information can help evaluate what structural attributes determine post-fire refugia patch use by lynx. Next steps for this work include integrating GEDI V3.0 data upon its release, identifying new GEDI metrics and derived products, and incorporating lynx radio-collar data into their analyses. Vogeler also presented her work as co-PI on a NASA Ecological Conservation Project in Greater Kruger National Park, South Africa, where she and her team are developing spatial monitoring tools to support management and conservation planning.<\/p>\n<p><strong>Jingfeng Xiao<\/strong> [University of New Hampshire] provided updates on his team\u2019s research using GEDI data to understand how structural diversity influences productivity and carbon uptake of forests in the United States. The project aims to assess GEDI\u2019s ability to quantify structural diversity, investigate how that diversity regulates forest productivity and carbon uptake, and understand its role in resilience of forest productivity to drought. When analyzing the relationships of gross primary production (GPP) and evapotranspiration (ET) with canopy structure metrics, the team found that increased canopy structure complexity positively affected GPP and ET and reduced their seasonal variability. They also found that greater canopy complexity improved ecosystem resistance to drought. As part of the project, the team also produced 1-km (0.62-mi) resolution gridded maps of GPP and ET.<\/p>\n<p><strong>Lei Ma<\/strong> [UMD] delivered the final talk of the STM, presenting his project that integrates GEDI observations with mechanistic ecosystem modeling to quantify forest regrowth in a changing climate. Ma used GEDI data and the <a href=\"https:\/\/gel.umd.edu\/ed.php\" rel=\"noopener\">Ecosystem Demography (ED) model<\/a> in his research and found that height and aboveground biomass (AGB) regrowth rates can be derived by combining GEDI and land-use and land-cover change data. Ma found that regrowth rates derived from different inputs are generally consistent at large scales but variable at fine scales. Notably, regrowth rates showed temporal dependence, decreasing by roughly 50% every decade. Lastly, Ma and his team found that spatial variation in height and AGB regrowth rates can be partially explained by environmental conditions and disturbance frequency.<\/p>\n<p><strong>Conclusion<\/strong><\/p>\n<p>The 2025 GEDI STM was especially exciting, as it came on the cusp of post-storage data being processed and released as V2.1. Additionally, it marked the first time the new CST cohort presented on their research and joined breakout sessions with the wider GEDI team. The meeting highlighted the mission\u2019s ongoing success and scientific value following hibernation on the ISS. Looking ahead, data users can anticipate the V3.0 product release later in 2025.<\/p>\n<p><strong><em>Talia Schwelling<\/em><\/strong><br \/><strong><em>University of Maryland College Park<\/em><\/strong><br \/><strong><em>tschwell@umd.edu<\/em><\/strong><\/p>\n<div id=\"\" class=\"nasa-gb-align-full width-full maxw-full padding-x-3 padding-y-0 nasa_template_article_a hds-module hds-module-full alignfull wp-block-nasa-blocks-credits-and-details\">\n<section class=\"padding-x-0 padding-top-5 padding-bottom-2 desktop:padding-top-7 desktop:padding-bottom-9\">\n<div class=\"grid-row grid-container maxw-widescreen padding-0\">\n<div class=\"grid-col-12 desktop:grid-col-2 padding-right-4 margin-bottom-5 desktop:margin-bottom-0\">\n<div class=\"padding-top-3 border-top-1px border-color-carbon-black\">\n<div class=\"margin-bottom-2\">\n<h2 class=\"heading-14\">Share<\/h2>\n<\/p>\n<\/div>\n<div class=\"padding-bottom-2\">\n<ul class=\"social-icons social-icons-round\">\n<li class=\"social-icon social-icon-x\">\n\t\t\t\t\t\t\t<a href=\"https:\/\/x.com\/intent\/tweet?via=NASA&#038;text=Summary%20of%20the%202025%20GEDI%20Science%20Team%20Meeting&#038;%23038;url=https%3A%2F%2Fscience.nasa.gov%2Funcategorized%2Fsummary-of-the-2025-gedi-science-team-meeting%2F\" aria-label=\"Share on X.\"><br \/>\n\t\t\t\t\t\t\t\t<svg width=\"1200\" height=\"1227\" viewBox=\"0 0 1200 1227\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M714.163 519.284L1160.89 0H1055.03L667.137 450.887L357.328 0H0L468.492 681.821L0 1226.37H105.866L515.491 750.218L842.672 1226.37H1200L714.137 519.284H714.163ZM569.165 687.828L521.697 619.934L144.011 79.6944H306.615L611.412 515.685L658.88 583.579L1055.08 1150.3H892.476L569.165 687.854V687.828Z\" fill=\"white\"\/><\/svg><br \/>\n\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t<\/li>\n<li class=\"social-icon social-icon-facebook\">\n\t\t\t\t\t\t\t<a href=\"https:\/\/www.facebook.com\/sharer.php?u=https%3A%2F%2Fscience.nasa.gov%2Funcategorized%2Fsummary-of-the-2025-gedi-science-team-meeting%2F\" aria-label=\"Share on Facebook.\" rel=\"noopener\"><br \/>\n\t\t\t\t\t\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 24 24\" aria-hidden=\"true\"><path d=\"M9 8h-3v4h3v12h5v-12h3.642l.358-4h-4v-1.667c0-.955.192-1.333 1.115-1.333h2.885v-5h-3.808c-3.596 0-5.192 1.583-5.192 4.615v3.385z\"\/><\/svg><br \/>\n\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t<\/li>\n<li class=\"social-icon social-icon-linkedin\">\n\t\t\t\t\t\t\t<a href=\"https:\/\/www.linkedin.com\/shareArticle?mini=true&#038;url=https%3A%2F%2Fscience.nasa.gov%2Funcategorized%2Fsummary-of-the-2025-gedi-science-team-meeting%2F\" aria-label=\"Share on LinkedIn.\" rel=\"noopener\"><br \/>\n\t\t\t\t\t\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 24 24\" aria-hidden=\"true\"><path d=\"M4.98 3.5c0 1.381-1.11 2.5-2.48 2.5s-2.48-1.119-2.48-2.5c0-1.38 1.11-2.5 2.48-2.5s2.48 1.12 2.48 2.5zm.02 4.5h-5v16h5v-16zm7.982 0h-4.968v16h4.969v-8.399c0-4.67 6.029-5.052 6.029 0v8.399h4.988v-10.131c0-7.88-8.922-7.593-11.018-3.714v-2.155z\"\/><\/svg><br \/>\n\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t<\/li>\n<li class=\"social-icon social-icon-rss\">\n\t\t\t\t\t\t\t<a href=\"https:\/\/science.nasa.gov\/feed\/\" aria-label=\"Subscribe to RSS feed.\"><br \/>\n\t\t\t\t\t\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 800 800\" aria-hidden=\"true\"><path d=\"M493 652H392c0-134-111-244-244-244V307c189 0 345 156 345 345zm71 0c0-228-188-416-416-416V132c285 0 520 235 520 520z\"\/><circle cx=\"219\" cy=\"581\" r=\"71\"\/><\/svg><br \/>\n\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid-col-12 desktop:grid-col-5 padding-right-4 margin-bottom-5 desktop:margin-bottom-0\">\n<div class=\"padding-top-3 border-top-1px border-color-carbon-black\">\n<div class=\"margin-bottom-2\">\n<h2 class=\"heading-14\">Details<\/h2>\n<\/p>\n<\/div>\n<div class=\"grid-row margin-bottom-3\">\n<div class=\"grid-col-4\">\n<div class=\"subheading\">Last Updated<\/div>\n<\/p>\n<\/div>\n<div class=\"grid-col-8\">Aug 18, 2025<\/div>\n<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid-col-12 desktop:grid-col-5 padding-right-4 margin-bottom-5 desktop:margin-bottom-0\">\n<div class=\"padding-top-3 border-top-1px border-color-carbon-black \">\n<div class=\"margin-bottom-2\">\n<h2 class=\"heading-14\">Related Terms<\/h2>\n<\/div>\n<ul class=\"article-tags\">\n<li class=\"article-tag\"><a href=\"https:\/\/science.nasa.gov\/category\/uncategorized\/\" rel=\"noopener\">Uncategorized<\/a><\/li>\n<li class=\"article-tag\"><a href=\"https:\/\/science.nasa.gov\/earth\/\" rel=\"noopener\">Earth Science<\/a><\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Introduction The 2025 Global Ecosystem Dynamics Investigation (GEDI) Science Team Meeting (STM) took place April 1\u20133, 2025 at the University of Maryland, College Park (UMD). Upwards of 60 participants attended in-person, while several others joined virtually by Zoom. The GEDI Mission and Competed Science Team members were in attendance along with the GEDI NASA program [\u2026]<\/p>\n","protected":false},"author":13,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[],"tags":[],"class_list":["post-268941","post","type-post","status-publish","format-standard","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/posts\/268941","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=268941"}],"version-history":[{"count":2,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/posts\/268941\/revisions"}],"predecessor-version":[{"id":269003,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=\/wp\/v2\/posts\/268941\/revisions\/269003"}],"wp:attachment":[{"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=268941"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=268941"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vibewire.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=268941"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}