Computer Science – Performance
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992wadc.iafcv....a&link_type=abstract
IAF, International Astronautical Congress, 43rd, Washington, Aug. 28-Sept. 5, 1992. 7 p.
Computer Science
Performance
Horizon Scanners, Infrared Scanners, Satellite Attitude Control, Field Of View, Infrared Spectra, Radiance
Scientific paper
The sun and the moon are two infrared sources in space which give false signals to the infrared earth sensors which are used for attitude sensing of satellites. Both the sun and moon subtend approximately half a degree angle at the satellite in low altitude orbits. The sun gives very large IR signal in, the spectral band of the sensor. The radiance from moon's illuminated side is comparable with the signal from the earth and it depends upon the phase of the moon in its orbit around the earth. The effect of the interference of these bodies on the sensor performance, the existing methods of avoiding the interference or rejection of such affected data and their limitations are discussed in this paper. New improved methods to detect the interference and for fault tolerant operation of the sensor in presence of such interference are presented.
Alex T. K.
Shrivastava S. K.
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