Regional Ionospheric Delay Modeling Method and Its Application Based on Uncombined PPP
Ionospheric delay is one of the main errors in GNSS positioning. The ionospheric total electron content (TEC) is the key information reflecting the ionospheric delay. Generally dual-frequency pseudo-range observations smoothing by carrier phase are used to extract TEC, resulting in observations including ionospheric delay, differential code bias (DCB) of satellites and receivers. This method ignores the known high-precision information of satellite position and clock, and the accuracy is limited by smoothing process. This paper, based on the raw observation data, performs uncombined PPP on the base station, separates the DCBs, extracts the TEC information of each station, establishes the regional ionospheric delay model, and finally verifies the ionospheric model accuracy by using single frequency PPP. The experimental results show that the model accuracy is better than 3TECU, and the single-frequency PPP accuracy is better than 0.3m.
uncombined PPP (UPPP) Total electron content (TEC) Ionospheric delay model Differential code bias (DCB)
Zhengxie Zhang Chengfa Gao Shuguo Pan Puyu Sun Bo Chen
School of Transportation, Southeast University, 2 Sipailou, 210096 Nanjing, China School of Instrument Science and Engineering, Southeast University, 2 Sipailou, 210096 Nanjing, Chin
国内会议
北京
英文
1-12
2019-05-01（万方平台首次上网日期，不代表论文的发表时间）