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

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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

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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