Paper Info
Title
Interferometric Phase Error Analysis And Compensation In Gnss-Insar: A Case Study Of Structural Monitoring
Abstract
Global navigation satellite system (GNSS)-based synthetic aperture radar interferometry (InSAR) employs GNSS satellites as transmitters of opportunity and a fixed receiver with two channels, i.e., direct wave and echo, on the ground. The repeat-pass concept is adopted in GNSS-based InSAR to retrieve the deformation of the target area, and it has inherited advantages from the GNSS system, such as a short repeat-pass period and multi-angle retrieval. However, several interferometric phase errors, such as inter-channel and atmospheric errors, are introduced into GNSS-based InSAR, which seriously decreases the accuracy of the retrieved deformation. In this paper, a deformation retrieval algorithm is presented to assess the compensation of the interferometric phase errors in GNSS-based InSAR. Firstly, the topological phase error was eliminated based on accurate digital elevation model (DEM) information from a light detection and ranging (lidar) system. Secondly, the inter-channel phase error was compensated, using direct wave in the echo channel, i.e., a back lobe signal. Finally, by modeling the atmospheric phase, the residual atmospheric phase error was compensated for. This is the first realization of the deformation detection of urban scenes using a GNSS-based system, and the results suggest the effectiveness of the phase error compensation algorithm.
Year
DOI
Venue
2021
10.3390/rs13153041
REMOTE SENSING
Keywords
DocType
Volume
GNSS-based InSAR, interferometric phase error, deformation retrieval
Journal
13
Issue
Citations 
PageRank 
15
0
0.34
References 
Authors
0
4
Name
Order
Citations
PageRank
Zhanze Wang101.69
Zhipeng Liu2366.61
Zeng Tao375.02
Chenghao Wang401.01