Abstract Based on data collected for 31 days at 20 stations of the Chinese coastal GNSS observation network in 2014, the method of estimating zenith tropospheric delay(ZTD) from GPS/GLONASS data in coastal areas is studied from data processing modes, system combinations and cut-off elevation angle. The ZTD products of CODE and radiosonde data are used as references to assess the estimated ZTD. The study indicates that the ZTD estimated from combined GPS/GLONASS double difference is better than that from GPS double difference and combined GPS/GLONASS precise point positioning(PPP) under 10° cut-off elevation angle. There is no obvious systematic bias in the extraction results of each method. Satellite cut-off angle setting has a great influence on the ZTD accuracy. The ZTD extracted by the double-difference network solution GPS single system has the best accuracy under 30° cut-off elevation angle, but its precision is significantly reduced compared to the results of the lower cut-off angle.
WANG Zhaoyang,XING Zhe,ZHOU Xinghua et al. Study on the Method of Extracting Zenith Tropospheric Delay by GPS/GLONASS in Coastal Area[J]. jgg, 2019, 39(6): 629-633.
WANG Zhaoyang,XING Zhe,ZHOU Xinghua et al. Study on the Method of Extracting Zenith Tropospheric Delay by GPS/GLONASS in Coastal Area[J]. jgg, 2019, 39(6): 629-633.