Welcome to my homepage!
This is about Space Geodesy.
I am always on the way to find and understand mm-to-meter level earthquake cycle deformation using space geodetic techniques.
My friends and I stand together for truth, science and love.
Contact me: zhangfeng.ma@ntu.edu.sg
Research Highlights:
Slow Rupture in a Fluid-rich Fault Zone Initiated the 2024 Mw 7.5 Noto Earthquake
Science
3D coseismic deformation and PGA
Slip model, stress drop and collocation with two fluid-rich zone inferred from two high Vp/Vs ratio anomalies
High freaquency radiators overlapped with eartquake swarms in the surprisingly slow inital rupture (snapshots)
Conceptional Model
Unwrapping Error and Fading Signal Correction on Multi-looked InSAR Data
Submitted to Remote Sensing of Environment
Fading signal can be estimated by stacking triplet phase closure. The estimated fading signal can help to improve the performance of unwrapping error correction.
After fading signal correction, triplet phase closure can be more concentrated on unwrapping error (integer cycles of 2-pi).
Unwrapping error and fading signal correction can help to reduce the uncertainty of InSAR results.
Unwrapping error and fading signal correction can help to reduce the uncertainty of InSAR velocity.
Unwrapping error and fading signal correction can help to unique InSAR result what if different interferograms are used.
Fading signal in wet season is more stronger than that in dry season. This discrepancy can even lead fake seasonal displacements into InSAR time series.
Our estimated fading signal can be directly used for soil moisture estimation and may benefit landuse mapping.
Space Geodetic Insights to the Stress Rotation after the February 2023 Turkey-Syria Earthquake Doublet
Submitted to Geophysical Research Letters
Classified Focal Mechanisms Before and After Earthquake Doublet
3D Deformation Maps defrived from Space Geodetic Data
Slip Distribution and Stress Field
Stress Rotation and Extensional Horsetail Splay Fault
A New Spatiotemporal InSAR Tropospheric Noise Filtering: An Interseismic Case Study Over Central San Andreas Fault
IEEE Transactions on Geoscience and Remote Sensing
Arc Graph Model Posterior Variances & Arc Model Type Automatically selected by F-Test
InSAR Displacement after Correction & Comparisons to GPS Stations
Challenges and Prospects to Time Series BOI (Burst Overlap Interferometry): Some Insights from a New BOI Algorithm Test over the Chaman Fault
IEEE Transactions on Geoscience and Remote Sensing
New Time Series BOI Workflow
BOI Interferogram Optimization
New Misregistration Estimation Method Which Considers Block Motion
BOI Velocity and Slip Rates Derived Using New Method
A Pseudo-SBAS Method to Invert 2D Deformations of the 2021 Central Greece Earthquake Sequence using Multi-track and Multi-temporal Sentinel-1 SAR Data
Submitted to Journal of Geodesy
Decomposed 2D deformation maps for three sequent earthquakes
Cascading triggering mechanisms for three earthquakes
Validation using Burst Overlap Interferometry (BOI)
Exploration on dipping direction of the fault geometry of Mar 4 earthquake using 2D deformations and 1D interferogram
Towards Big SAR Data Era: An Efficient Sentinel-1 Near-Real-Time InSAR Processing Workflow with an Emphasis on Co-registration and Phase Unwrapping
ISPRS J P&RS
Sequential Sentinel-1 TOPS Data Time Series Coresgistration
IEEE TGRS 2020
Sentinel-1 TOPS Interferometric Processing
InSAR 3D Phase Unwrapping
Time Series Phase Unwrapping Based on Graph Theory and Compressed Sensing
IEEE TGRS 2021
If you would like to obtain a code copy or are interested in collaborative researches, please contact the author at the following E-mail addresses: jspcmazhangfeng@hhu.edu.cn
Go Extra Miles: An Additional Error Correction Procedure Aimed to Further Improve Phase Unwrapping Accuracy and Creep Model Uncertainty
JGR-SE 2021
InSAR Unwrapping Error Correction and Creep Model Uncertainty Improvement
