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Optimal Design for Regional Navigation Constellation Based on Beidou I Satellite Navigation System

Jingwei Zhang

Abstract

Analyze coverage characteristics of Beidou I to our country and our periphery zone. The optimal design for Inclined Geo-Synchronous Orbit (IGSO) regional navigation constellation based on 3 Geostationary Earth Orbit (GEO) satellites of Beidou I is a major research here. By simulation analysis about the sub-satellite point trace, educe what conditions the right ascension of the ascending node (RAAN), the argument of perigee and the original phase angle of constellation should satisfy when the coverage performance is optimal. Adopting the method of grid simulation and Taking the regional coverage performance and the Position Dilution of Precision (PDOP) as optimal indexes, the optimal design process for eccentricity of inclined geo-synchronous ellipse orbit (IGSEO) constellation and inclination of inclined geo-synchronous circular orbit (IGSCO) constellation is stated. Two themes of regional navigation constellation based on Beidou I are given. Both the two themes can enable a six-fold continuous coverage to China and its surrounding areas, and the average PDOP is less than 4.

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Key concepts: Dilution of precision, Geostationary orbit, Constellation, Geosynchronous orbit, Computer science, Orbit (dynamics), Satellite constellation, Geodesy