Precise Positioning of BDS, BDS/GPS: Implications for Tsunami Early Warning in South China Sea

Remote Sensing

Kejie Chen¹  Natalia Zamora²  Andrey Y. Babeyko²  Xingxing Li²  Maorong Ge²  Zhenhong Li²  Roberto Tomas²  Xiaofeng Li² 

[1] GFZ German Research Centre for Geoscience, Telegrafenberg, 14473 Potsdam, Germany

关键词: BDS;    BDS/GPS;    South China Sea;    tsunami early warning system;   

DOI  :  10.3390/rs71215814

来源: mdpi

【 摘 要 】

Global Positioning System (GPS) has been proved to be a powerful tool for measuring co-seismic ground displacements with an application to seismic source inversion. Whereas most of the tsunamis are triggered by large earthquakes, GPS can contribute to the tsunami early warning system (TEWS) by helping to obtain tsunami source parameters in near real-time. Toward the end of 2012, the second phase of the BeiDou Navigation Satellite System (BDS) constellation was accomplished, and BDS has been providing regional positioning service since then. Numerical results indicate that precision of BDS nowadays is equivalent to that of the GPS. Compared with a single Global Satellite Navigation System (GNSS), combined BDS/GPS real-time processing can improve accuracy and especially reliability of retrieved co-seismic displacements. In the present study, we investigate the potential of BDS to serve for the early warning system of tsunamis in the South China Sea region. To facilitate early warnings of tsunamis and forecasting capabilities in this region, we propose to distribute an array of BDS-stations along the Luzon Island (Philippines). By simulating an earthquake with Mw = 8 at the Manila trench as an example, we demonstrate that such an array will be able to detect earthquake parameters in real time with a high degree of accuracy and, hence, contribute to the fast and reliable tsunami early warning system in this region.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.