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Proceedings Paper

Vicarious calibration of GOES Imager visible channel using the Moon
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Paper Abstract

In this paper, we study the feasibility of a method for vicarious calibration of the GOES Imager visible channel using the Moon. The measured Moon irradiance from 26 unclipped moon imagers exhausted all the potential Moon appearances between July 1998 and December 2005, together with the seven scheduled Moon observation data obtained after November 2005, were compared with the USGS lunar model results to estimate the degradation rate of the GOES-10 Imager visible channel. A total of nine methods of determining the space count and identifying lunar pixels were employed in this study to measure the Moon irradiance. Our results show that the selected mean and the masking Moon appears the best method. Eight of the nine resulting degradation rates range from 4.5%/year to 5.0%/year during the nearly nine years of data, which are consistent with most other degradation rates obtained for GOES-10 based on different references. In particular, the degradation rate from the Moon-based calibration (4.5%/year) agrees very well with the MODIS-based calibration (4.4%/year) over the same period, confirming the capability of relative and absolute calibration based on the Moon. Finally, our estimate of lunar calibration precision as applied to GOES-10 is 3.5%.

Paper Details

Date Published: 7 September 2006
PDF: 12 pages
Proc. SPIE 6296, Earth Observing Systems XI, 62960Z (7 September 2006); doi: 10.1117/12.681591
Show Author Affiliations
Xiangqian Wu, NOAA/NESDIS/ORA (United States)
Thomas C. Stone, U.S. Geological Survey (United States)
Fangfang Yu, ERT, Inc. (United States)
Dejiang Han, ASRC Aerospace (United States)

Published in SPIE Proceedings Vol. 6296:
Earth Observing Systems XI
James J. Butler, Editor(s)

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