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Download filePPP-derived tropospheric ZWD augmentation from local CORS network tested on bridge monitoring points
journal contribution
posted on 2022-12-05, 16:11 authored by Xu Tang, Zhizhao Liu, Gethin Wyn Roberts, Craig HancockCraig HancockThis paper developed the tropospheric correction augmented PPP for the purpose of bridge displacement monitoring. ZWD is estimated from undifferenced observations collected by UK CORS, and further applied to augment PPP client for displacement at the bridge surveying points. Coordinate time series obtained by GPS DD are treated as the true bridge displacement, which is used to assess the standard and CORS ZWD augmented PPP solutions obtained by varying cutoff angles. The experimental results reveal that the displacement precision of standard PPP severely depends on the satellite geometry. Meanwhile, the CORS ZWD augmented PPP results are less affected. The RMSE of improved PPP time series in the vertical component drops by 12%, 49% and 66% for the 5°, 10° and 15° cutoff angle cases, respectively. CORS ZWD augmented PPP can improve the monitoring precision and eliminate irregular displacement time series due to poor satellite geometry.
Funding
Research on Key Technologies of Dynamic Deformation Monitoring of Inter-satellite Differential RTK PPP Large Bridge
National Natural Science Foundation of China
Find out more...Startup for Introducing Talent of NUIST (project 2019r034)
China Design Group Co.,LTD.
GNSS+ water vapor detection research and its innovative application in extreme weather and climate change
National Natural Science Foundation of China
Find out more...Hong Kong Research Grants Council (RGC) (projects PolyU and PolyU)
History
School
- Architecture, Building and Civil Engineering
Published in
Advances in Space ResearchVolume
69Issue
10Pages
3633 - 3643Publisher
ElsevierVersion
- AM (Accepted Manuscript)
Rights holder
© COSPARPublisher statement
This paper was accepted for publication in the journal Advances in Space Research and the definitive published version is available at https://doi.org/10.1016/j.asr.2022.02.054Acceptance date
2022-02-27Publication date
2022-03-04Copyright date
2022ISSN
0273-1177eISSN
1879-1948Publisher version
Language
- en