【摘 要】
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UsingGNSSobservation datato establish high‐precision ionospheric modelhas an importantrole in precise point positioning,real‐time navigationandionosphereresea
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UsingGNSSobservation datato establish high‐precision ionospheric modelhas an importantrole in precise point positioning,real‐time navigationandionosphereresearch.One of themain errorsources to accurately estimate totalelectron content(TEC)isDifferential Code Bias(DCB).At present,the international GNSSService(IGS)dailypublishGPSandGLONASSsatellites DCB andIGStracking stationreceivers DCB,BeiDouNavigation Satellite System (BDS) has notprovidedthe BDS satellitesDCBservices.Based onBeiDou Experimental Tracking Stations (BETS),and usea combination ofionosphericresidualmethod to resolve BDSsatellites DCB andBETStracking stationreceiversDCB at B1andB2frequencies.The results show that,BDS satellites DCB are between‐8~16 ns at B1 andB2frequencies and theirstabilities are basically better than0.5 ns.Because of the satellite elevation,IGSOsatellitesDCB have higheststabilities,followed by MEOsatellites,and GEO satellites have worst stabilities,especiallyC04and C05; BETStracking stationreceiversDCBarebasically between‐5~‐25 ns,and theirstabilities are better than1.5 ns.
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