Effect of Surface Mass Loading on Geodetic GPS Observations
We investigated the effect of mass loading (atmospheric, oceanic and hydrological loading (AOH)) on Global Positioning System (GPS) height time series from 30 GPS stations in the Eurasian plate. Wavelet coherence (WTC) was employed to inspect the correlation and the time-variable relative phase betw...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2018-10-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | http://www.mdpi.com/2076-3417/8/10/1851 |
| _version_ | 1818910939656749056 |
|---|---|
| author | Zhen Li Jianping Yue Jiyuan Hu Yunfei Xiang Jian Chen Yankai Bian |
| author_facet | Zhen Li Jianping Yue Jiyuan Hu Yunfei Xiang Jian Chen Yankai Bian |
| author_sort | Zhen Li |
| collection | DOAJ |
| description | We investigated the effect of mass loading (atmospheric, oceanic and hydrological loading (AOH)) on Global Positioning System (GPS) height time series from 30 GPS stations in the Eurasian plate. Wavelet coherence (WTC) was employed to inspect the correlation and the time-variable relative phase between the two signals in the time–frequency domain. The results of the WTC-based semblance analysis indicated that the annual fluctuations in the two signals for most sites are physically related. The phase asynchrony at the annual time scale between GPS heights and AOH displacements indicated that the annual oscillation in GPS heights is due to a combination of mass loading signals and systematic errors (AOH modelling errors, geophysical effects and/or GPS system errors). Moreover, we discuss the impacts of AOH corrections on GPS noise estimation. The results showed that not all sites have an improved velocity uncertainty due to the increased amplitude of noise and/or the decreased spectral index after AOH corrections. Therefore, the posterior mass loading model correction is potentially feasible but not sufficient. |
| first_indexed | 2024-12-19T22:50:46Z |
| format | Article |
| id | doaj.art-ea22f508e708458f87e93404db06367d |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-19T22:50:46Z |
| publishDate | 2018-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-ea22f508e708458f87e93404db06367d2022-12-21T20:02:49ZengMDPI AGApplied Sciences2076-34172018-10-01810185110.3390/app8101851app8101851Effect of Surface Mass Loading on Geodetic GPS ObservationsZhen Li0Jianping Yue1Jiyuan Hu2Yunfei Xiang3Jian Chen4Yankai Bian5School of Earth Sciences and Engineering, Hohai University, Nanjing 211100, ChinaSchool of Earth Sciences and Engineering, Hohai University, Nanjing 211100, ChinaSchool of Geodesy and Geomatics, Wuhan University, Wuhan 430079, ChinaSchool of Earth Sciences and Engineering, Hohai University, Nanjing 211100, ChinaSchool of Earth Sciences and Engineering, Hohai University, Nanjing 211100, ChinaSchool of Earth Sciences and Engineering, Hohai University, Nanjing 211100, ChinaWe investigated the effect of mass loading (atmospheric, oceanic and hydrological loading (AOH)) on Global Positioning System (GPS) height time series from 30 GPS stations in the Eurasian plate. Wavelet coherence (WTC) was employed to inspect the correlation and the time-variable relative phase between the two signals in the time–frequency domain. The results of the WTC-based semblance analysis indicated that the annual fluctuations in the two signals for most sites are physically related. The phase asynchrony at the annual time scale between GPS heights and AOH displacements indicated that the annual oscillation in GPS heights is due to a combination of mass loading signals and systematic errors (AOH modelling errors, geophysical effects and/or GPS system errors). Moreover, we discuss the impacts of AOH corrections on GPS noise estimation. The results showed that not all sites have an improved velocity uncertainty due to the increased amplitude of noise and/or the decreased spectral index after AOH corrections. Therefore, the posterior mass loading model correction is potentially feasible but not sufficient.http://www.mdpi.com/2076-3417/8/10/1851GPScross wavelet transformmass loadingnoise estimate |
| spellingShingle | Zhen Li Jianping Yue Jiyuan Hu Yunfei Xiang Jian Chen Yankai Bian Effect of Surface Mass Loading on Geodetic GPS Observations Applied Sciences GPS cross wavelet transform mass loading noise estimate |
| title | Effect of Surface Mass Loading on Geodetic GPS Observations |
| title_full | Effect of Surface Mass Loading on Geodetic GPS Observations |
| title_fullStr | Effect of Surface Mass Loading on Geodetic GPS Observations |
| title_full_unstemmed | Effect of Surface Mass Loading on Geodetic GPS Observations |
| title_short | Effect of Surface Mass Loading on Geodetic GPS Observations |
| title_sort | effect of surface mass loading on geodetic gps observations |
| topic | GPS cross wavelet transform mass loading noise estimate |
| url | http://www.mdpi.com/2076-3417/8/10/1851 |
| work_keys_str_mv | AT zhenli effectofsurfacemassloadingongeodeticgpsobservations AT jianpingyue effectofsurfacemassloadingongeodeticgpsobservations AT jiyuanhu effectofsurfacemassloadingongeodeticgpsobservations AT yunfeixiang effectofsurfacemassloadingongeodeticgpsobservations AT jianchen effectofsurfacemassloadingongeodeticgpsobservations AT yankaibian effectofsurfacemassloadingongeodeticgpsobservations |