TY - JOUR
T1 - PPP-derived tropospheric ZWD augmentation from local CORS network tested on bridge monitoring points
AU - Tang, Xu
AU - Liu, Zhizhao
AU - Wyn Roberts, Gethin
AU - Matthew Hancock, Craig
N1 - Funding Information:
Xu Tang was supported by the National Natural Science of China (NSFC) (project 41704024), the Startup for Introducing Talent of NUIST (project 2019r034) and the foundation from China Design Group Co.,LTD. Zhizhao Liu was supported by the Key Programme of NSFC (project 41730109) and the Hong Kong Research Grants Council (RGC) (projects PolyU and PolyU).
Funding Information:
The International GNSS Service (IGS) is acknowledged for providing the high-rate GPS observations, satellite clock and orbital products. The services of the Natural Environment Research Council (NERC) British Isles continuous GNSS Facility (BIGF, www.bigf.ac.uk) are gratefully acknowledged for providing archived CORS GNSS data to this study. Financial support. Xu Tang was supported by the National Natural Science of China (NSFC) (project 41704024), the Startup for Introducing Talent of NUIST (project 2019r034) and the foundation from China Design Group Co.LTD. Zhizhao Liu was supported by the Key Programme of NSFC (project 41730109) and the Hong Kong Research Grants Council (RGC) (projects PolyU and PolyU).
Publisher Copyright:
© 2022 COSPAR
PY - 2022/5
Y1 - 2022/5
N2 - 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.
AB - 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.
KW - Bridge Displacement Monitoring
KW - Precise Point Positioning
KW - Zenith Wet Delay
UR - http://www.scopus.com/inward/record.url?scp=85126124394&partnerID=8YFLogxK
U2 - 10.1016/j.asr.2022.02.054
DO - 10.1016/j.asr.2022.02.054
M3 - Journal article
AN - SCOPUS:85126124394
VL - 69
SP - 3633
EP - 3643
JO - Life sciences and space research
JF - Life sciences and space research
SN - 0273-1177
IS - 10
ER -