Paper Info
Title
A Decentralized Processing Schema for Efficient and Robust Real-time Multi-GNSS Satellite Clock Estimation
Abstract
Real-time multi-GNSS precise point positioning (PPP) requires the support of high-rate satellite clock corrections. Due to the large number of ambiguity parameters, it is difficult to update clocks at high frequency in real-time for a large reference network. With the increasing number of satellites of multi-GNSS constellations and the number of stations, real-time high-rate clock estimation becomes a big challenge. In this contribution, we propose a decentralized clock estimation (DECE) strategy, in which both undifferenced (UD) and epoch-differenced (ED) mode are implemented but run separately in different computers, and their output clocks are combined in another process to generate a unique product. While redundant UD and/or ED processing lines can be run in offsite computers to improve the robustness, processing lines for different networks can also be included to improve the clock quality. The new strategy is realized based on the Position and Navigation Data Analyst (PANDA) software package and is experimentally validated with about 110 real-time stations for clock estimation by comparison of the estimated clocks and the PPP performance applying estimated clocks. The results of the real-time PPP experiment using 12 global stations show that with the greatly improved computational efficiency, 3.14 cm in horizontal and 5.51 cm in vertical can be achieved using the estimated DECE clock.
Year
DOI
Venue
2019
10.3390/rs11212595
REMOTE SENSING
Keywords
DocType
Volume
Multi-GNSS constellation,real-time precise positioning,satellite clock estimation,precise point positioning
Journal
11
Issue
Citations 
PageRank 
21
0
0.34
References 
Authors
0
5
Name
Order
Citations
PageRank
Xinyuan Jiang100.34
Shengfeng Gu232.97
Pan Li301.35
Maorong Ge42919.02
Harald Schuh53520.68