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Proceedings Paper

Ground-monitor radiometer system for vicarious calibration
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Paper Abstract

The Remote Sensing Group at the University of Arizona has been active in the vicarious calibration of numerous sensors through the use of ground-based test sites. Application of these approaches has been limited in the past by the fact that ground-based personnel must be present at the time of the sensor overpass. This work presents the design and implementation of a set of ground-based, ground-viewing radiometers that are deployed without the need for on-site personnel. The radiometers are based on LED detectors allowing them to be robust and inexpensive and combining the results of these measurements with known calibration of the sensors and a suitable surface BRDF model, allows the surface spectral reflectance of the test site to be determined for the sensor overpass. The at-sensor radiance can be predicted via a radiative transfer code using atmospheric data from a fully-automated solar radiometer. Early results from this approach are presented for the Landsat ETM+ and Terra and Aqua MODIS sensors. These results show that errors are currently larger for this method than those with ground-based personnel, but the increased number of calibration opportunities should improve the overall understanding of the sensor calibration.

Paper Details

Date Published: 15 October 2004
PDF: 10 pages
Proc. SPIE 5546, Imaging Spectrometry X, (15 October 2004); doi: 10.1117/12.559950
Show Author Affiliations
Kurtis Thome, Optical Sciences Ctr./Univ. of Arizona (United States)
Jeffrey Czapla-Myers, Optical Sciences Ctr./Univ. of Arizona (United States)
Stuart F. Biggar, Optical Sciences Ctr./Univ. of Arizona (United States)

Published in SPIE Proceedings Vol. 5546:
Imaging Spectrometry X
Sylvia S. Shen; Paul E. Lewis, Editor(s)

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