Latest GNSS results of the CMONOC network and

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 ØBackground & motivation ØGNSS Velocity field ØIonospheric disturbance monitoring ØGNSS coseismic monitoring ØFurther results and analysis ØSummary 2

Background & motivation ØCMONOC (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

Background & Motivation ØRoutine GNSS data analysis at SHAO SHA strategy in huge network solution (Chen et al. CSNC 2013) 4

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

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

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

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

Further results and analysis ØTroposphere Regional modeling and real-time estimation ZTD time series ZTD modeling 9

Further results and analysis ØSite deformation analysis Expansion rate Vertical seasonal signal Strain rate 10

Summary ØRoutine GNSS CMONOC analysis at SHAO ØVelocity field & earthquake monitoring results ØTroposphere modeling and site deformation analysis on going NEXT: ØCMONOC data contributing to BDS data analysis ØRegional RF combining with SLR & VLBI 11

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