Improved GOES earth sensor performance

Edward R. Washwell; Keiko Chevray; Ahmed Kamel; Andre' Dress; Tim Walsh

doi:10.1117/12.254114

18 October 1996 Improved GOES earth sensor performance

Edward R. Washwell, Keiko Chevray, Ahmed Kamel, Andre' Dress, Tim Walsh

Proceedings Volume 2812, GOES-8 and Beyond; (1996) https://doi.org/10.1117/12.254114
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

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.

Citation Download Citation

Edward R. Washwell, Keiko Chevray, Ahmed Kamel, Andre' Dress, and Tim Walsh "Improved GOES earth sensor performance", Proc. SPIE 2812, GOES-8 and Beyond, (18 October 1996); https://doi.org/10.1117/12.254114

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