Improvement of Polarimetric SAR Calibration Based on the Ainsworth Algorithm for Chinese Airborne PolSAR Data

Author

Hong Zhang ; Wuping Lu ; Bo Zhang ; Jiehong Chen ; Chao Wang

Author_Institution

Key Lab. of Digital Earth, Center for Earth Obs. & Digital Earth, Beijing, China

Volume

10

Issue

4

fYear

2013

fDate

Jul-13

Firstpage

898

Lastpage

902

Abstract

It is necessary to calibrate polarimetric synthetic aperture radar (PolSAR) data in order to use the data for science applications. In this letter, we propose an improved algorithm to estimate the calibration parameters based on the Ainsworth algorithm and the Quegan algorithm. Since there is no approximation in the process of the parameter estimation, this algorithm can accurately solve all parameters, even if the crosstalk is high. To verify the effect of the proposed calibration algorithm, this letter analyzes the accuracy of the proposed algorithm with the simulated PolSAR data and Chinese airborne X-band PolSAR data. The results confirm that the proposed algorithm can provide a more stable and accurate solution to the crosstalk parameters.

Keywords

airborne radar; calibration; crosstalk; geophysical techniques; radar polarimetry; synthetic aperture radar; Ainsworth algorithm; Chinese airborne X-band PolSAR data; Quegan algorithm; calibration algorithm; crosstalk parameters; polarimetric synthetic aperture radar data calibration; Accuracy; Algorithm design and analysis; Approximation algorithms; Calibration; Crosstalk; Estimation; Scattering; Ainsworth algorithm; Quegan algorithm; calibration; polarimetric synthetic aperture radar (PolSAR);

fLanguage

English

Journal_Title

Geoscience and Remote Sensing Letters, IEEE

Publisher

ieee

ISSN

1545-598X

Type

jour

DOI

10.1109/LGRS.2012.2226864

Filename

6417956