In order to further help users keep up to date with the quality of precision orbit and clock deviation data provided by the analysis centers and improve the accuracy and convergence time of precision single point positioning (PPP) results,the paper assessed and analyzed the precision products from different analysis centers under the international global navigation satellite system (GNSS) monitoring & assessment system (IGMAS) and the International GNSS Service (IGS):the differential code bias (DCB) correction model of BeiDou navigation satellite system (BDS)'s satellite end was established for BeiDou-3 navigation satellite system (BDS-3)'s new frequency points B1C and B2a;then BDS B1I/B3I and B1C/B2a combination and GPS L1/L2 combination were used,and 15 multi-GNSS experiment (MGEX) stations were selected to collect data for 5 days for precision products of different analysis centers for static and para-dynamic PPP performance analysis.Experimental result showed that the B1C/B2a combination could offer superior accuracy than the B1I/B3I combination,with a 4.4％ and 4.3％ enhancement in E and N directions during static PPP;moreover,variances would exist in BDS/GNSS PPP performance across centers,specifically,COD,GFZ and WUM products would exhibit exceptional results,IAC products would demonstrate overall excellence but with some stability concerns,IGMAS products,due to larger sampling intervals,would exhibit slightly lower positioning accuracy compared to other centers,and SHAO products would reveal notable fluctuations in positioning errors during dynamic PPP experiments.
BeiDou navigation satellite system (BDS)/global navigation satellite system (GNSS)/BeiDou-3 navigation satellite system (BDS-3)/international GNSS monitoring & assessment system (IGMAS)/precise point positioning (PPP)/differential code bias (DCB)/precision
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