Paper Info
Title
Robust, Model-Based External Calibration of Multi-Channel Airborne SAR Sensors using Range Compressed Raw Data
Abstract
The paper describes a method for the accurate calibration of multi-channel SAR instruments, such as those required to support SAR polarimetry, single-pass interferometry and digital beam-forming (DBF), on the basis of dedicated SAR acquisitions containing reference targets with known properties. Unlike conventional approaches, the method is based entirely on the analysis of range-compressed raw data. It leverages the pulse-by-pulse analysis of amplitude, phase and delay variations observed within the range histories of reference targets to fully characterize and correct propagation direction dependent calibration issues such as those related to antenna pointing or antenna phase center positions. The fact that the approach does not require SAR image focusing in azimuth is especially relevant in the context of DBF, where individual channels need to be calibrated but are, by themselves, under-sampled. The calibration techniques presented are illustrated and validated using multi-channel polarimetric and single-pass interferometric SAR data acquired by DLR's airborne F-SAR and DBFSAR instruments.
Year
DOI
Venue
2019
10.3390/rs11222674
REMOTE SENSING
Keywords
DocType
Volume
Synthetic Aperture Radar,external calibration,SAR polarimetry,SAR interferometry,digital beam-forming,baseline calibration,geometric calibration,antenna pointing
Journal
11
Issue
Citations 
PageRank 
22
0
0.34
References 
Authors
0
3
Name
Order
Citations
PageRank
Marc Jäger11169.88
Rolf Scheiber257468.81
Andreas Reigber367070.53