A PS points selection algorithm based on edge detection for GNSS-based InSAR system
- Resource Type
- Conference
- Authors
- Xu, Zhixiang; Liu, Feifeng; Wang, Zhanze; Wang, Chenghao; Gao, Jian
- Source
- 2021 CIE International Conference on Radar (Radar) Radar (Radar), 2021 CIE International Conference on. :2621-2625 Dec, 2021
- Subject
- Aerospace
Communication, Networking and Broadcast Technologies
Computing and Processing
Fields, Waves and Electromagnetics
Geoscience
Robotics and Control Systems
Signal Processing and Analysis
Global navigation satellite system
Image edge detection
Spaceborne radar
Radar detection
Coherence
Radar scattering
Synthetic aperture radar
global navigation satellite system (GNSS)
persistent scatterer (PS)-InSAR
edge detection
- Language
- ISSN
- 2640-7736
Global navigation satellite system (GNSS)-based interferometric synthetic aperture radar (InSAR) can be considered as a distributed system. Traditional persistent scatterer (PS)-InSAR technique cannot be directly used due to the large point spread function (PSF) of GNSS-based InSAR. In this paper, a PS point selection algorithm based on edge detection and PSF comparison is proposed. First, the PSF of the strong points are extracted based on the edge detection. Then the coherence coefficient is calculated based on the theoretical PSF to obtain the PS candidate (PSC) points. Raw data is used to verify the effetiveness of the proposed algorithm in GNSS-based InSAR.