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Proceedings Paper

Improved GOES earth sensor performance
Author(s): Edward R. Washwell; Keiko Chevray; Ahmed Kamel; Andre' Dress; Tim Walsh
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Paper Abstract

The Earth Sensors on GOES-8 exhibit seasonal pointing errors in both the dual and single chord operating modes of the sensors. The errors were largely compensated for by a software patch uploaded to the satellite. The combination of detailed analyses and laboratory test results established that the observed error signatures are the result of stray solar radiation. The nature of the stray radiation paths giving rise to the seasonal errors is such that only the most significant stray path was eliminated in the GOES-9 hardware. The Earth Sensors on GOES-9 show significantly improved pointing performance over GOES-8, validating the origin of the most significant error source in the GOES-8 Earth Sensors. Low level seasonal pointing errors are observed, as expected, in the GOES-9 Earth Sensors. These errors again are effectively compensated for by an additional software patch developed to permit satisfactory single chord Earth Sensor operation. The operating principles of the Earth Sensor are described. On-orbit data of the seasonal anomalies are presented for both the uncompensated and compensated hardware and operating modes.

Paper Details

Date Published: 18 October 1996
PDF: 12 pages
Proc. SPIE 2812, GOES-8 and Beyond, (18 October 1996); doi: 10.1117/12.254114
Show Author Affiliations
Edward R. Washwell, Space Systems/Loral (United States)
Keiko Chevray, Space Systems/Loral (United States)
Ahmed Kamel, Space Systems/Loral (United States)
Andre' Dress, Computer Sciences Corp. (United States)
Tim Walsh, NOAA (United States)

Published in SPIE Proceedings Vol. 2812:
GOES-8 and Beyond
Edward R. Washwell, Editor(s)

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