Physics
Scientific paper
May 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980kosis..18..366d&link_type=abstract
Kosmicheskie Issledovaniia, vol. 18, May-June 1980, p. 366-372. In Russian.
Physics
Angles (Geometry), Optical Communication, Signal Detectors, Spacecraft Communication, Incident Radiation, Linear Filters, Optical Scanners, System Effectiveness
Scientific paper
The paper examines two methods of evaluation of the angle of direction towards the center of the earth of signals to optical scanning detectors. Formulas are derived which determine the accuracy of the direction; it is shown that the optimum system with maximum accuracy in the determination of the direction towards the earth's center represents a linear filter (bolometer), whose output supplies the intake of a correcting filter of a lower frequency in an optimum band. Using the location of earth's natural radiation in the infrared range, it is shown that this simple threshold scheme can be used for the location of artificial earth satellites and spacecraft.
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