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Latest GNSS results of the CMONOC network and its application in earthquake monitoring

Latest GNSS results of the CMONOC network and its application in earthquake monitoring Junping Chen, Yize Zhang, Yibing Xie, Weijie Tan, Sainan Yang, Bin Wu Shanghai Astronomical Observatory (SHAO) junping@shao.ac.cn http://www.shao.ac.cn/shao_gnss_ac. Content. Background & motivation

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Latest GNSS results of the CMONOC network and its application in earthquake monitoring

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  1. Latest GNSS results of the CMONOC network and its application in earthquake monitoring Junping Chen, Yize Zhang, Yibing Xie, Weijie Tan, Sainan Yang, Bin Wu Shanghai Astronomical Observatory (SHAO) junping@shao.ac.cn http://www.shao.ac.cn/shao_gnss_ac

  2. Content • Background & motivation • GNSS Velocity field • Ionospheric disturbance monitoring • GNSS coseismic monitoring • Further results and analysis • Summary 2

  3. Background & motivation • CMONOC(Crustal Movement Observation Network of China) 260 continuous stations 2000 campaign stations 6 SLR + 3 VLBI 100 absolute gravity stations 700 relative gravity stations http://neiscn.org/ 3

  4. Background & Motivation • Routine GNSS data analysis at SHAO • SHA strategy in huge network solution (Chen et al. CSNC2013) 4

  5. Background & Motivation • GNSS data analysis at SHAO • GNSS routine results Troposphere Time series Coord. Time series 5

  6. CMONOC GNSS Velocity field • Daily solutions combined using QOCA • 247 stations with time span > 1 year • ITRF 2008 => EURA plate Horizontal Vertical 6

  7. Ionospheric disturbance monitoring • VTEC Quartiles ① calculation of the VTEC (Vertical TEC) using precise model; ② calculation the real-time VTEC and VTEC quartiles of current epoch; ③ comparison between real-time VTEC and VTEC quartiles to check for ionospheric disturbances. Lushan (Sichuan Province) MS7.0 earthquake on April 20,2013 Estimated VTEC less than L2 quartile: disturbance Zhang X H 2013; Xie Yibing et al. 2014 7

  8. GNSS coseismic monitoring • instantaneous site velocity solution ① retrieval of real-time high rate streams; ② calculation of the Doppler observations; ③ estimation of station instantaneous velocity; ④check for coseismic deformation. Xinjiang Ms6.6 earthquake on June 30,2012 Zhang and Guo 2013 8

  9. Further results and analysis • Troposphere • Regional modeling and real-time estimation ZTD time series ZTD modeling 9

  10. Further results and analysis • Site deformation analysis Vertical seasonal signal Expansion rate Strain rate 10

  11. Summary • Routine GNSS CMONOC analysis at SHAO • Velocity field & earthquake monitoring results • Troposphere modeling and site deformation analysis on going • NEXT: • CMONOC data contributing to BDS data analysis • Regional RF combining with SLR & VLBI 11

  12. Acknowledgment: NSFC project (No. 11273046) CMONOC Project http://www.shao.ac.cn/shao_gnss_ac Thank you! 12

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