Next Article in Journal
Deriving Field Scale Soil Moisture from Satellite Observations and Ground Measurements in a Hilly Agricultural Region
Next Article in Special Issue
Assessment of Integrated Water Vapor Estimates from the iGMAS and the Brazilian Network GNSS Ground-Based Receivers in Rio de Janeiro
Previous Article in Journal
A Machine Learning Approach to Crater Classification from Topographic Data
Previous Article in Special Issue
Precise Orbit Determination for BeiDou GEO/IGSO Satellites during Orbit Maneuvering with Pseudo-Stochastic Pulses
Open AccessArticle

A Decentralized Processing Schema for Efficient and Robust Real-time Multi-GNSS Satellite Clock Estimation

1
German Research Centre for Geosciences GFZ, Telegrafenberg, 14473 Potsdam, Germany
2
Technische Universitaet Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
3
GNSS Research Center, Wuhan University, NO. 129 Luoyu Road, Wuhan 430079, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2019, 11(21), 2595; https://doi.org/10.3390/rs11212595
Received: 9 October 2019 / Revised: 31 October 2019 / Accepted: 4 November 2019 / Published: 5 November 2019
(This article belongs to the Special Issue Global Navigation Satellite Systems for Earth Observing System)
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. View Full-Text
Keywords: Multi-GNSS constellation; real-time precise positioning; satellite clock estimation; precise point positioning Multi-GNSS constellation; real-time precise positioning; satellite clock estimation; precise point positioning
Show Figures

Graphical abstract

MDPI and ACS Style

Jiang, X.; Gu, S.; Li, P.; Ge, M.; Schuh, H. A Decentralized Processing Schema for Efficient and Robust Real-time Multi-GNSS Satellite Clock Estimation. Remote Sens. 2019, 11, 2595.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop