Abstract We analyze the accuracy of the RT-GIM products during January and August 2021 from Chinese Academy of Sciences(CAS), Centre National d’Etudes Spatiales(CNES), Canadian Geodetic Survey of Natural Resources Canada(NRCan) and Polytechnic University of Catalonia(UPC). Compared to the post-processed IGS-GIM, the RMS between those RT-GIM and the IGS-GIM is 3.93 TECu for CAS, 4.01 TECu for CNES, 4.50 TECu for NRCan and 3.86 TECu for UPC. Compared to the dSTEC derived from reference stations, the STD of RT-GIM from CAS, CNES, NRCan and UPC are 4.42 TECu, 4.40 TECu, 4.96 TECu and 4.42 TECu, respectively. Based on the positioning results carried on 21 globally distributed GNSS stations during 7 consecutive days, we analyze the 95% quantile of vertical residuals to check the positioning improvement of different RT-GIM. Compared to positioning results corrected by the broadcast ionospheric model, the positioning accuracy increases by 11.9% for CAS, 18.3% for CNES, 3.4% for NRCan and 15.5% for UPC in the elevation direction of the northern hemisphere.
ZHANG Yan,WANG Ningbo,LI Zishen et al. Accuracy Analysis of Real-Time Global Ionospheric Maps from CAS, CNES, NRCan and UPC[J]. jgg, 2022, 42(10): 1095-1100.
ZHANG Yan,WANG Ningbo,LI Zishen et al. Accuracy Analysis of Real-Time Global Ionospheric Maps from CAS, CNES, NRCan and UPC[J]. jgg, 2022, 42(10): 1095-1100.
