Parameters estimation and applications from single- to five-frequency multi-GNSS precise point positioning

doi:10.11947/j.AGCS.2022.20220129

Abstract

Abstract: Global navigation satellite system (GNSS) has been developed into the era of multi-frequency multi-GNSS, particularly four global navigation satellite systems including China's BeiDou navigation satellite system (BDS) with broadcasting more than ten frequencies of all-day and all-time observation information about pseudo-range, phase and Doppler. Multi-frequency multi-GNSS provides users more observations with more combination choices and new opportunities for the applications of precise positioning, navigation and timing (PNT), such as high precision location-based services, geodesy, space weather and disaster monitoring. However, the multi-frequency and multi-GNSS brings numerous questions and challenges, e.g. the combination models and system bias of GNSS precise point positioning (PPP) as well as atmospheric delay estimation. This paper presents multi-GNSS PPP models from single- to five-frequency observations. The PPP performance, receiver clock difference, tropospheric delay, satellite and receiver hardware delay, and inter-frequency bias are estimated and assessed from single- to five-frequency multi-GNSS observations. The latest advances on GNSS PPP applications are presented, including GNSS meteorology, ionospheric modeling, time-frequency transfer, structure health and earthquake monitoring as well as their related applications. The results show that the multi-frequency multi-GNSS has greatly improved the accuracy and reliability of PPP in parameters estimation, which has an important application value. Finally, the application prospective and outlook of multi-frequency multi-GNSS PPP are given and discussed.

Key words: GNSS, precise point positioning, meteorology, ionosphere, earthquake monitoring

CLC Number:

P228

JIN Shuanggen, WANG Qisheng, SHI Qiqi. Parameters estimation and applications from single- to five-frequency multi-GNSS precise point positioning[J]. Acta Geodaetica et Cartographica Sinica, 2022, 51(7): 1239-1248.

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