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Surface Parameter Estimation using bistatic polarimetric X-band Measurements

Ben Khadhra, Kais and Börner, Thomas and Hounam, David and Chandra, Madhukar (2012) Surface Parameter Estimation using bistatic polarimetric X-band Measurements. Progress In Electromagnetics Research B, 39, pp. 197-223. EMW Publishing. ISSN 1937-6472.

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Official URL: http://www.jpier.org/PIERB/pier.php?paper=12020112

Abstract

The main purpose of this paper is to separately estimate the important surface parameters (soil moisture and roughness) by using full polarimetric bistatic measurements. The results provide a basis for new satellite application of future bistatic measurement systems such as the TanDEM-X satellite mission. Initially, bistatic X-band measurements, which have been recorded in the Bistatic Measurement Facility (BMF) at the DLR Oberpfaffenhofen, Microwaves and Radar Institute, will be presented. The bistatic measurement sets are composed of soils with different well-known statistical roughness scales and different moistures. The BMF has been calibrated using the Isolated Antenna Calibration Technique (IACT). The validation of the calibration was achieved by measuring the reflectivity of fresh water. In the second part, the assessment of the surface parameters (soil moisture and surface roughness) using the well calibrated data introduced in the former related part, will be detailed. The validation of the specular algorithm by estimating the soil moisture of two surfaces with different roughness scales will be reported. Additionally, a new technique using the coherent term of the Integral Equation Method (IEM) to estimate the soil roughness will be presented, as well as the sensitivity of phase and reflectivity with regard to moisture variation and therefore the penetration depth was evaluated. Current results demonstrate a non-linear relationship between the signal phase and the soil moisture, as expected, confirming the possibility of using DInSAR to measure variations in soil moisture.

Document Type:Article
Title:Surface Parameter Estimation using bistatic polarimetric X-band Measurements
Authors:
AuthorsInstitution or Email of Authors
Ben Khadhra, KaisUniversity of Waterloo, Canada
Börner, ThomasUNSPECIFIED
Hounam, DavidUNSPECIFIED
Chandra, MadhukarTechnische Universität Chemnitz
Date:March 2012
Journal or Publication Title:Progress In Electromagnetics Research B
Refereed publication:Yes
In Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:No
Volume:39
Page Range:pp. 197-223
Editors:
EditorsEmail
Chew, Weng ChoUniversity of Hong Kong
Publisher:EMW Publishing
Series Name:Progress In Electromagnetics Research
ISSN:1937-6472
Status:Published
Keywords:Soil moisture, soil roughness, radar, SAR, polarimetry, bistatic, anechoic chamber, parameter extraction
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben SAR-Expert-Support-Lab
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Microwaves and Radar Institute
Deposited By: Dr.rer.nat. Thomas Börner
Deposited On:23 Mar 2012 15:47
Last Modified:07 Feb 2013 20:48

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