Latest GNSS results of the CMONOC network and its application in earthquake monitoring
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Transcript of 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)[email protected]
http://www.shao.ac.cn/shao_gnss_ac
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Content
Background & motivation
GNSS Velocity field
Ionospheric disturbance monitoring
GNSS coseismic monitoring
Further results and analysis
Summary
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Background & motivation
http://neiscn.org/
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
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Background & MotivationRoutine GNSS data analysis at SHAOSHA strategy in huge network solution (Chen et al. CSNC2013)
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Background & MotivationGNSS data analysis at SHAOGNSS routine results
Troposphere Time series
Coord. Time series
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CMONOC GNSS Velocity fieldDaily solutions combined using QOCA247 stations with time span > 1 yearITRF 2008 => EURA plate
Horizontal
Vertical
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Ionospheric disturbance monitoringVTEC Quartiles
Zhang X H 2013; Xie Yibing et al. 2014
4/11 4/12 4/13 4/14 4/15 4/16 4/17 4/18 4/19 4/20 4/210
5
10
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25
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Td/d
VT
EC
(TE
CU
)
Mean L1 L2 Real
Lushan (Sichuan Province) MS7.0 earthquake on April 20,2013Estimated VTEC less than L2 quartile: disturbance
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.
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GNSS coseismic monitoringinstantaneous site velocity solution
Zhang and Guo 2013
Xinjiang Ms6.6 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.
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Further results and analysisTroposphereRegional modeling and real-time estimation
ZTD time series
ZTD modeling
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Further results and analysisSite deformation analysis
Vertical seasonal signalExpansion rate
Strain rate
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SummaryRoutine 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 analysisRegional RF combining with SLR & VLBI
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Thank you!Thank you!
Acknowledgment: NSFC project (No. 11273046)
CMONOC Projecthttp://www.shao.ac.cn/shao_gnss_ac