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Meet the “Scene Select Mechanism”—Part of the LDCM Thermal Infrared Sensor

Meet the “Scene Select Mechanism”—Part of the LDCM Thermal Infrared Sensor Special Topics: LDCM and LDCM Components The Scene Select Mechanism is an apparatus that rotates the LDCM Thermal Infrared Sensor (TIRS) mirror among three scenes: the Earth view (“nadir;” when imaging the Earth), and two calibration views (one of a warm blackbody carried onboard […]

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LDCM Operational Land Imager (OLI) Telescope

LDCM Operational Land Imager (OLI) Telescope Special Topics: LDCM and LDCM Components The OLI telescope uses a four-mirror compact design. The optics are positioned inside a lightweight, yet highly stable, carbon composite optical bench (i.e., a substrate on which the optics are mounted) that has special features to control undesired stray light (stray light is […]

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NASA 2025-10-21 05:36:12

Landsat Data Continuity Mission Becomes an Observatory • Engineers at Orbital Sciences Corporation, Gilbert, Ariz., have installed the Thermal Infrared Sensor (TIRS) instrument back onto to the Landsat Data Continuity Mission (LDCM) spacecraft. With both the Operational Land Imager (OLI) and TIRS instruments now on the spacecraft, LDCM is a complete observatory.After the TIRS instrument was […]