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Proceedings Paper

Evaluation of GLAMR-based calibration for SI-traceable field reflectance retrievals
Author(s): Amit Angal; Joel McCorkel; Kurt Thome
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Paper 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.

Paper Details

Date Published: 19 September 2016
PDF: 6 pages
Proc. SPIE 9972, Earth Observing Systems XXI, 99721U (19 September 2016); doi: 10.1117/12.2238630
Show Author Affiliations
Amit Angal, Science Systems and Applications, Inc. (United States)
Joel McCorkel, NASA Goddard Space Flight Ctr. (United States)
Kurt Thome, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 9972:
Earth Observing Systems XXI
James J. Butler; Xiaoxiong (Jack) Xiong; Xingfa Gu, Editor(s)

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