BDS Precise Point Positioning for Seismic Displacements Monitoring: Benefit from the High-Rate Satellite Clock CorrectionsReportar como inadecuado


BDS Precise Point Positioning for Seismic Displacements Monitoring: Benefit from the High-Rate Satellite Clock Corrections


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GNSS Research Center, Wuhan University, 129 Luoyu Road, Wuhan 430079, China





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Academic Editor: Assefa M. Melesse

Abstract In order to satisfy the requirement of high-rate high-precision applications, 1 Hz BeiDou Navigation Satellite System BDS satellite clock corrections are generated based on precise orbit products, and the quality of the generated clock products is assessed by comparing with those from the other analysis centers. The comparisons show that the root mean square RMS of clock errors of geostationary Earth orbits GEO is about 0.63 ns, whereas those of inclined geosynchronous orbits IGSO and medium Earth orbits MEO are about 0.2–0.3 ns and 0.1 ns, respectively. Then, the 1 Hz clock products are used for BDS precise point positioning PPP to retrieve seismic displacements of the 2015 Mw 7.8 Gorkha, Nepal, earthquake. The derived seismic displacements from BDS PPP are consistent with those from the Global Positioning System GPS PPP, with RMS of 0.29, 0.38, and 1.08 cm in east, north, and vertical components, respectively. In addition, the BDS PPP solutions with different clock intervals of 1 s, 5 s, 30 s, and 300 s are processed and compared with each other. The results demonstrate that PPP with 300 s clock intervals is the worst and that with 1 s clock interval is the best. For the scenario of 5 s clock intervals, the precision of PPP solutions is almost the same to 1 s results. Considering the time consumption of clock estimates, we suggest that 5 s clock interval is competent for high-rate BDS solutions. View Full-Text

Keywords: BDS; precise point positioning; seismic displacements; Nepal earthquake; satellite clock corrections BDS; precise point positioning; seismic displacements; Nepal earthquake; satellite clock corrections





Autor: Tao Geng, Xing Su, Rongxin Fang * , Xin Xie, Qile Zhao and Jingnan Liu

Fuente: http://mdpi.com/



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