My research focuses on InSAR displacement measurement associated with earthquakes, geothermal fields, landslides, etc., in which advanced algorithms and methods are used to guarantee the reliability of InSAR results. Based on the InSAR displacements, the undergoing geophysical mechanism/process is further analyzed.  My Ph.D. degree mainly includes estimating InSAR three-dimensional (3-D) displacements by combining various SAR/InSAR measurements (i.e., DInSAR, POT, MAI, and BOI), and mitigating errors (e.g., decorrelation noise, DEM error, tropospheric delay) in InSAR time series. I swiftly obtained and shared the 3-D displacements of several earthquakes (e.g., the 2021 Mw7.4 Maduo earthquake and the 2022 Mw6.9 Menyuan earthquake in China). Also, the long-term (2007-2020) InSAR displacements over the Geysers geothermal field in California are acquired. I’m now trying to look into the mechanism of earthquakes, geothermal fields, and so on.

• Liu, J., Hu, J., Xu, W., Li, Z., Zhu, J., Ding, X., & Zhang, L. (2019). Complete Three-Dimensional Coseismic Deformation Field of the 2016 Central Tottori Earthquake by Integrating Left- and Right-Looking InSAR Observations With the Improved SM-VCE Method. Journal of Geophysical Research: Solid Earth, 124(11), 12099–12115. https://doi.org/10.1029/2018JB017159
• Hu, J., Liu, J., Li, Z., Zhu, J., Wu, L., Sun, Q., & Wu, W. (2021). Estimating three-dimensional coseismic deformations with the SM-VCE method based on heterogeneous SAR observations : Selection of homogeneous points and analysis of observation combinations. Remote Sensing of Environment, 255, 112298. https://doi.org/10.1016/j.rse.2021.112298
• Liu, J., Hu, J., Burgmann, R., Li, Z., Sun, Q., & Ma, Z. (2021). A Strain-Model Based InSAR Time Series Method and its Application to The Geysers Geothermal Field, California. Journal of Geophysical Research: Solid Earth, 126(8), e2021JB021939. https://doi.org/10.1029/2021JB021939
• Liu, J., Hu, J., Li, Z., Sun, Q., Ma, Z., Zhu, J., & Wen, Y. (2021). Dynamic Estimation of Multi-Dimensional Deformation Time Series from InSAR Based on Kalman Filter and Strain Model. IEEE Transactions on Geoscience and Remote Sensing. https://doi.org/10.1109/TGRS.2021.3125574
• Liu, J., Hu, J., Li, Z., Ma, Z., Wu, L., Jiang, W., et al. (2022). Complete three-dimensional coseismic displacements due to the 2021 Maduo earthquake in Qinghai Province, China from Sentinel-1 and ALOS-2 SAR images. SCIENCE CHINA Earth Sciences, 65(4), 687–697. https://doi.org/10.1007/s11430-021-9868-9
  

• Ph.D., September 2017 to June 2022, Surveying and Mapping, Central South University, China
• B.S., September 2013 to June 2017, Geomatics Engineering, Central South University, China

• Physical Science and Engineering Division
• Crustal Deformation and InSAR Group