Evaluation of GLAMR-based calibration for SI-traceable field reflectance retrievals

Amit Angal; Joel McCorkel; Kurt Thome

doi:10.1117/12.2238630

19 September 2016 Evaluation of GLAMR-based calibration for SI-traceable field reflectance retrievals

Amit Angal, Joel McCorkel, Kurt Thome

Proceedings Volume 9972, Earth Observing Systems XXI; 99721U (2016) https://doi.org/10.1117/12.2238630
Event: SPIE Optical Engineering + Applications, 2016, San Diego, California, United States

Abstract

The reflected solar instrument that is part of the Climate Absolute Radiance and Refractivity Observatory (CLARREO) mission is being formulated with a goal of providing SI-traceable measurement of radiance that is an order of magnitude more accurate than the current imaging sensors. The Goddard Laser for Absolute Measurement of Radiance (GLAMR) is a key element to reaching such accuracy along with transferring the laboratory calibration to on-orbit measurements. Results from field reflectance retrievals using three separate instruments all of which have been calibrated using GLAMR are shown. The instruments include a commercial field spectrometer and a portable version of CLARREO’s calibration demonstration system. The third instrument is NASA Goddard’s Lidar, Hyperspectral and Thermal Imager (G-LiHT) which is an airborne system. All three were operated during a March 2013 measurement campaign at Red Lake Playa, Arizona as part of the on-orbit commissioning phase of Landsat 8. Reflectance is derived from near-coincident measurements by the three sensors for a small area of the playa. The retrieved results are SI-traceable and demonstrate the ability to transfer the GLAMR calibration to the field. Use of the G-LiHT data in the calibration of Landsat-7 and -8 sensors permits them both to be placed on the GLAMR-scale as well.

Citation Download Citation

Amit Angal, Joel McCorkel, and Kurt Thome "Evaluation of GLAMR-based calibration for SI-traceable field reflectance retrievals", Proc. SPIE 9972, Earth Observing Systems XXI, 99721U (19 September 2016); https://doi.org/10.1117/12.2238630

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