A New Method of Satellite Link Antenna Pointing Error Analysis for the Mixed Constellations
Satellite link communication is a rising technique problem in global satellite navigation systems of each country in nowadays. Spot antenna can be used to deal with satellite link communication. As the designed beam angle of spot antenna is very small, satellite link antenna is very sensitive with the satellite platform attitude error. In this paper, a new method of satellite link antenna pointing error modeling and analysis is presented for a kind of mixed constellations navigation satellite systems. The rotation matrix method is used for the integrated error analysis, each kind of error sources which affect the satellite link antenna pointing precision in the mixed constellation is considered synthetically. The analysis results are the conclusions of the whole satellite level, which can exactly reflect that whether the selected spot antenna can be able to satisfy the geometric basic condition of building the satellite link. Numerical example is given to illustrate the effectiveness of the analysis method.
KeywordsSatellite link antenna Antenna pointing error Error sources Rotation matrix method
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