Using TSX/TDX Pursuit Monostatic SAR Stacks for PS-InSAR Analysis in Urban Areas
Abstract
:1. Introduction
2. Materials and Methods
2.1. Standard PS-InSAR
- Preliminary processing: image import; master selection; co-registration; resampling; reflectivity map generation; amplitude stability index generation;
- Preliminary geocoding: ground control point (GCP) selection; external DEM input; projection of external DEM and synthetic amplitude in SAR coordinates; Mask for PSCs;
- APS estimation: interferometric formation using star graph; select a subset of PSCs according to a certain threshold; triangulation of sparse PSC network and generation of differential phase; deformation and topographic estimation based on given search space; selection of reference point; inversion of initial APS;
- Sparse estimation: interferometric formation using star graph; selection of all PSCs based on a certain threshold; Input of initial APS, differential phase and reference points; deformation and topographic estimations based on the given search space for the PSCs.
2.2. A PS-InSAR Solution for Mono-Static Pursuit Datasets
- Preliminary processing: image import; master selection; co-registration; resampling; reflectivity map generation; amplitude stability index generation;
- Preliminary geocoding: GCP selection; external DEM input; projection of external DEM and synthetic amplitude in SAR coordinates; Mask for PSCs;
- First APS estimation: interferometric formation using only 10 s PM pairs; selection of a subset of PSCs according to a certain threshold; triangulation of sparse PSC network and generation of the differential phase; topographic estimation only based on a given search space; selection of the reference point; inversion of the initial APS;
- First sparse estimation: interferometric formation using only 10 s PM pairs; selection of all PSCs based on a certain threshold; input of initial APS, differential phase, and reference point; topographic estimation only based on the given search space for PSCs;
- Second APS estimation: interferometric formation using a star graph; selection of a subset of PSCs according to a certain threshold; triangulation of sparse PSC networks and generation of a differential phase; deformation estimation based on residual phase components derived in the first round within a given search space; selection of the reference point; inversion of the initial APS;
- Second Sparse estimation: interferometric formation using star graph; selection of all PSCs based on a certain threshold; Input of initial APS, differential phase and reference point; deformation estimation based on the residual phase component derived in first round within a given search space for PSCs;
3. Experiment Results
3.1. Study Area and Dataset Information
3.2. Experimental Results
3.2.1. Processing Results from the Standard Method
3.2.2. Processing Results from Our Proposed Method
4. Discussion
4.1. Temporal Coherence
4.2. Topography Estimation
4.2.1. PS Point Numbers
4.2.2. Persistent Scatterer Density
4.3. Deformation Estimation
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Operation Mode | Pursuit Mono-Static | |
---|---|---|
Image Mode | Staring Spotlight (ST) | |
Look Angle | 43.4° | |
Polarization | VV | |
Direction | Ascending | |
Resolution | 0.24 m (azimuth) | |
0.80 m (ground range) | ||
Azimuth Extent | 3 km | |
Range Extent | 5.5 km | |
External Information | Acquisition Time | Temperature (°C) |
20141211 | 14.5 | |
20141222 | 9.1 | |
20150102 | 11.6 | |
20150113 | 11.2 | |
20150204 | 12.4 | |
20150215 | 16.7 | |
20150226 | 22.0 |
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Wang, Z.; Balz, T.; Zhang, L.; Perissin, D.; Liao, M. Using TSX/TDX Pursuit Monostatic SAR Stacks for PS-InSAR Analysis in Urban Areas. Remote Sens. 2019, 11, 26. https://doi.org/10.3390/rs11010026
Wang Z, Balz T, Zhang L, Perissin D, Liao M. Using TSX/TDX Pursuit Monostatic SAR Stacks for PS-InSAR Analysis in Urban Areas. Remote Sensing. 2019; 11(1):26. https://doi.org/10.3390/rs11010026
Chicago/Turabian StyleWang, Ziyun, Timo Balz, Lu Zhang, Daniele Perissin, and Mingsheng Liao. 2019. "Using TSX/TDX Pursuit Monostatic SAR Stacks for PS-InSAR Analysis in Urban Areas" Remote Sensing 11, no. 1: 26. https://doi.org/10.3390/rs11010026