Beidou GEO satellite precise timing system and method based on directional antenna
A directional antenna and timing system technology, applied in the field of satellite timing, can solve the problems of difficulty in fixing carrier phase ambiguity, limited ability to resist multipath effects, low code pseudorange measurement accuracy, etc., so as to weaken multipath effects and reduce observation noise. , the effect of improving the signal-to-noise ratio
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[0039] The present invention will be described in further detail below in conjunction with specific examples, but the embodiments of the present invention are not limited thereto.
[0040] BeiDou Navigation Satellite System (BDS) has been officially put into operation, and time service is one of the three basic service functions of BDS. The Beidou system adopts the GEO / IGSO / MEO mixed constellation. Currently, there are 45 Beidou-2 (BDS-2) and Beidou-3 (BDS-3) satellites in orbit, including 8 GEO, 10 IGSO and 27 MEO. Among them, GEO satellites have the characteristics of "stationary" and are always visible to fixed stations on the ground. Compared with MEO satellites, which have invisible arcs every day, GEO satellites are more suitable for observation with directional antennas to provide continuous and stable precision timing services.
[0041] figure 1 It is a schematic diagram of the Beidou GEO satellite precision timing system based on the directional antenna provided by t...
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