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Service accuracy of global navigation satellite system(GNSS)is determined by satellite constellation,signal-in-space(SIS)accuracy and signal transmission errors.The State Council Information Office of the People’s Republic of China issued China’s BeiDou Navigation Satellite System(BDS)White Paper(www.beidou.gov.cn/fbh2016.html)on Jun.16th 2016,which notes that,BDS takes a three-step development strategy,from domestic service,through Asia-Pacific regional service,to global service,and features mixed constellation of Geostationary Earth Orbit(GEO),Inclined Geostationary Earth Orbit(IGSO)and Medium
Service accuracy of global navigation satellite system (GNSS) is determined by satellite constellation, signal-in-space (SIS) accuracy and signal transmission errors. The State Council Information Office of the People’s Republic of China issued China’s BeiDou Navigation Satellite System (BDS) White Paper (www.beidou.gov.cn/fbh2016.html) on Jun.16th 2016, which notes that, BDS takes a three-step development strategy, from domestic service, through Asia-Pacific regional service, to global service, and features mixed constellation of Geostationary Earth Orbit (GEO), Inclined Geostationary Earth Orbit (IGSO) and Medium