Space Coverage Analysis of BeiDou Navigation Satellite System Regional Constellation

摘要

Satellites constellation space coverage analysis plays an important reference role in GNSS spatial positioning, navigation and timing, guides the designing of future constellation. This paper used regional constellation of BeiDou navigation satellite system composed of 5GEO, 5IGSO and 4MEO satellites, based on geometric relationship between satellite, earth and focused point, computed worldwide spatial visible satellites number and PDOP, analyzed the statistical results, and showed the spatio-temporal distribution. Computational results showed that: BeiDou regional navigation satellite system could provide effective PNT services for Asia-Pacific region and spatial south and north Polar Regions under 1,000 km, satisfied the designed requirements, but not the space above 1,000 km because of the promptly reducing of spatial coverage range, increasing of effective continual time segments, decreasing of maximum continual time and total time in all segments.