Prediction of Polarimetric-SAR Field-Orientation Rotation Due to Topographical Slope Variation for Squint Operations

Author

Sabry, R. ; Vachon, P.W. ; Cole, M.

Author_Institution

Radar Applic. & Space Technol., Defence R&D Canada - Ottawa, Ottawa, ON, Canada

Volume

8

Issue

3

fYear

2011

fDate

5/1/2011 12:00:00 AM

Firstpage

570

Lastpage

574

Abstract

Local surface slope variations can impact synthetic aperture radar (SAR) imagery by changing the perceived polarization state of the imaged region. Correction of the topography-induced effects results in more accurate evaluation of polarimetric parameters. In this letter, the polarization-orientation angle (POA) correction is analytically estimated for a general polarimetric-SAR scenario operating at a known squint angle based upon a digital elevation model, permitting correction of the topography-induced effects. It can also aid to identify a squint angle that can counteract the effect of a specific POA rotation. Model parameters are demonstrated through a software implementation.

Keywords

geophysical signal processing; radar polarimetry; radar signal processing; remote sensing by radar; synthetic aperture radar; topography (Earth); POA correction; PolSAR field orientation rotation prediction; SAR imagery; local surface slope variations; perceived polarization state change; polarimetric SAR; polarization orientation angle correction; squint operations; synthetic aperture radar; topographical slope variation; topography induced effect correction; Azimuth; Imaging; Radar polarimetry; Remote sensing; Scattering; Surfaces; Synthetic aperture radar; Polarimetry; polarization orientation angle (POA); synthetic aperture radar (SAR);

fLanguage

English

Journal_Title

Geoscience and Remote Sensing Letters, IEEE

Publisher

ieee

ISSN

1545-598X

Type

jour

DOI

10.1109/LGRS.2010.2092410

Filename

5677572