Physics
Scientific paper
Jun 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981itb....27...25s&link_type=abstract
IEEE Transactions on Broadcasting, vol. BC-27, June 1981, p. 25-28.
Physics
Blackout (Propagation), Broadcasting, Communication Satellites, Satellite Networks, Solar Eclipses, Spacecraft Power Supplies, Orbit Calculation, Parallax, Photovoltaic Conversion, Radiation Effects, Solar Cells, Spherical Coordinates, Synchronous Satellites, Transmission Efficiency
Scientific paper
A relatively simple method for calculating eclipses by the moon at a given satellite is presented. The method uses data of solar eclipses on the surface of the earth published yearly in the Nautical Almanac. Two coordinate systems used to position the sun and the moon on the celestial sphere are considered: the equatorial coordinates and the horizon coordinates. The eclipse at a geostationary satellite is calculated by determining the parallax of the stellar body, the difference between the geocentric and satellicentric altitude angles. An example of the method is illustrated for several eclipses which occurred during 1981. The example shows how the method is used to determine both the times and the depth of the eclipses.
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