Paper Info
Title
Calibration and Validation of Polarimetric ALOS2-PALSAR2
Abstract
PALSAR2 polarimetric distortion matrix is measured using corner reflectors deployed in the Amazonian forest. The Amazonian forest near the geomagnetic equator provides ideal sites for the assessment of L-band PALSAR2 antenna parameters, at free Faraday rotation. Corner reflectors (CRs) deployed at free Faraday rotation provide accurate estimation of antenna cross-talks in contrast to the biased measurements obtained with CRs deployed at significant Faraday rotation. The extended Freeman-Van Zyl calibration method introduced and validated for ALOS-PALSAR calibration is used for the assessment of PALSAR-2 calibration parameters. Six datasets collected over the Amazonian rainforests (with CRs) are used to assess PALSAR-2 distortion matrix for five beams (FP6-3 to FP6-7) with incidence angle varying from 25 degrees to 40 degrees. It is shown that the PALSAR2 antenna is highly isolated with very low cross-talks (lower than -40 dB). Finally, the impact of a significant Faraday rotation on antenna cross-talk measurements using CR is discussed.
Year
DOI
Venue
2022
10.3390/rs14102452
REMOTE SENSING
Keywords
DocType
Volume
radar polarimetry, synthetic aperture radar, calibration, Faraday rotation
Journal
14
Issue
ISSN
Citations 
10
2072-4292
0
PageRank 
References 
Authors
0.34
0
3
Name
Order
Citations
PageRank
Ridha Touzi121425.43
M. Shimada2795145.65
Takeshi Motohka300.34