Integration of Single-Frequency GNSS and Strong-Motion Observations for Real-Time Earthquake Monitoring
1
National Time Service Center, Chinese Academy of Sciences, Shu Yuan Road, Xi’an 710600, China
2
University of Chinese Academy of Sciences, Yu Quan Road, Beijing 100049, China
3
Key Laboratory of Precision Navigation Positioning and Timing Technology, Chinese Academy of Sciences, Xi’an 710600, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2018, 10(6), 886; https://doi.org/10.3390/rs10060886
Received: 18 April 2018 / Revised: 26 May 2018 / Accepted: 5 June 2018 / Published: 6 June 2018
(This article belongs to the Special Issue Revisiting the 2008 Mw 7.9 Wenchuan, China Earthquake: New evidence and implications from earth observations)
In this study, a real-time earthquake monitoring system based on the integration of single-frequency global navigation satellite system (GNSS) and strong motion (SM) observations was developed. This high-precision integrated system can provide full-frequency monitoring information, and it makes full use of SM data to quickly and accurately determine the vibration window for initial baseline shift correction. High-precision displacement data obtained from GNSS epoch-differenced velocity estimation are used to constrain the SM’s low-frequency baseline shift. Hence, full-frequency monitoring information (displacement, velocity, and acceleration) can be provided in real-time. Three different datasets were used for validation and the results confirm that the proposed system can be used for practical earthquake monitoring.
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MDPI and ACS Style
Tu, R.; Zhang, R.; Zhang, P.; Liu, J.; Lu, X. Integration of Single-Frequency GNSS and Strong-Motion Observations for Real-Time Earthquake Monitoring. Remote Sens. 2018, 10, 886.
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