Landsat 9 Thermal Infrared Sensor 2 pre-launch characterization: initial imaging and spectral performance results

Aaron Pearlman; Joel McCorkel; Matthew Montanaro; Boryana Efremova; Brian Wenny; Allen Lunsford; Amy Simon; Jason Hair; Dennis Reuter

doi:10.1117/12.2321084

7 September 2018 Landsat 9 Thermal Infrared Sensor 2 pre-launch characterization: initial imaging and spectral performance results

Aaron Pearlman, Joel McCorkel, Matthew Montanaro, Boryana Efremova, Brian Wenny, Allen Lunsford, Amy Simon, Jason Hair, Dennis Reuter

Author Affiliations +

Proceedings Volume 10764, Earth Observing Systems XXIII; 1076406 (2018) https://doi.org/10.1117/12.2321084
Event: SPIE Optical Engineering + Applications, 2018, San Diego, California, United States

Abstract

The Thermal Infrared Sensor-2 (TIRS-2) aboard Landsat 9 will continue Landsat’s four decade-long legacy of providing moderate resolution thermal imagery from low earth orbit (at 705 km) for environmental applications. Like the Thermal Infrared Sensor aboard Landsat 8, it is a pushbroom sensor with a cross-track field of view of 15° and provides two spectral channels at 10.8 and 12 μm. To ensure radiometric, spatial, and spectral performance, a comprehensive pre-launch testing program is being conducted at NASA Goddard Space Flight Center at the component, subsystem, and instrument level. This paper will focus on the results from the subsystem level testing where the instrument is almost completely assembled. This phase of testing is specifically designed to assess imaging performance including focus and stray light rejection, but is also used to provide a preliminary assessments of spatial and spectral performance. The calibration ground support equipment provides a flexible blackbody illumination source and optics to conduct these tests. The spectral response test setup has its own illumination source outside the chamber that propagates through the calibration ground support equipment in an optical configuration designed for this purpose. This test configuration with the calibration ground support equipment and TIRS-2 subsystem in the thermal vacuum chamber enables a large range of illumination angles for stray light measurements. The results show that TIRS-2 performance is expected to meet all of its performance requirements with few waivers and deviations.

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Aaron Pearlman, Joel McCorkel, Matthew Montanaro, Boryana Efremova, Brian Wenny, Allen Lunsford, Amy Simon, Jason Hair, and Dennis Reuter "Landsat 9 Thermal Infrared Sensor 2 pre-launch characterization: initial imaging and spectral performance results", Proc. SPIE 10764, Earth Observing Systems XXIII, 1076406 (7 September 2018); https://doi.org/10.1117/12.2321084

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