Assessment of Data Quality and Seismic Monitoring Capability of the Belt and Road GNSS Network

Abstract

The B&R GNSS network is an important part of the modern seismic observation network, and it is also a typical representation of the large-scale deployment of domestic GNSS equipment in the seismic system for the first time. In this study, 4 representative GNSS sites in different regions of China were selected, and the G-Nut/anubis software was used to evaluate the multi-system GNSS observation data, focusing on 4 indicators: data integrity rate, data validity ratio, multipath error, and cycle slip ratio, and evaluate its earthquake monitoring capabilities based on high-frequency GNSS estimated earthquake magnitudes. The results show that: 1) The quality of multi-system GNSS observation data produced by the three domestic GNSS receivers used in the Belt and Road GNSS network meets the project design and specification requirements; 2) After the network is established, the number of GNSS sites in the Sichuan-Yunnan region that can be used to monitor co-seismic response displacement and estimate Mw6.5 earthquakes can reach 11, and there is good coverage of the Sichuan-Yunnan Rhomboid Block and the western Yunnan region.

Keywords: Belt and Road, multi-system GNSS, quality assessment, seismic monitoring capability