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PPP-derived tropospheric ZWD augmentation from local CORS network tested on bridge monitoring points

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posted on 2022-12-05, 16:11 authored by Xu Tang, Zhizhao Liu, Gethin Wyn Roberts, Craig HancockCraig Hancock
This 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

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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

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Hong Kong Research Grants Council (RGC) (projects PolyU and PolyU)

History

School

  • Architecture, Building and Civil Engineering

Published in

Advances in Space Research

Volume

69

Issue

10

Pages

3633 - 3643

Publisher

Elsevier

Version

  • AM (Accepted Manuscript)

Rights holder

© COSPAR

Publisher 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.2022.02.054

Acceptance date

2022-02-27

Publication date

2022-03-04

Copyright date

2022

ISSN

0273-1177

eISSN

1879-1948

Language

  • en

Depositor

Dr Craig Hancock. Deposit date: 29 November 2022

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