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Analyzing the Influence of Wet Biomass Changes in Polarimetric Differential SAR Interferometry at L-Band

Brancato, Virginia and Hajnsek, Irena (2018) Analyzing the Influence of Wet Biomass Changes in Polarimetric Differential SAR Interferometry at L-Band. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 11 (5), pp. 1494-1508. IEEE - Institute of Electrical and Electronics Engineers. DOI: 10.1109/JSTARS.2018.2805775 ISSN 1939-1404

Full text not available from this repository.

Official URL: https://ieeexplore.ieee.org/document/8314462/

Abstract

The displacement estimated with differential SAR interferometry (DInSAR) might not be unique when more than one polarization channel is available. For the case of agricultural areas, these ambiguities have been mainly related to complex vegetation dynamics, i.e., vegetation growth. This study intends to explore the potential of a synergistic use of DInSAR with SAR Polarimetry (PolDInSAR) in tracking changes within agricultural vegetation covers. The connection between the PolDInSAR observables (i.e., herein, the DInSAR phases at various polarization channels and/or their linear combinations) with wet biomass and soil water content changes is empirically investigated with linear regression techniques. This is done in the frame of an L-band airborne DInSAR dataset. The impact of vegetation vigor differs depending on the type of crop analyzed. For those crops exhibiting a birefringent electromagnetic propagation (i.e., barley, wheat, and rapeseed), the influence of wet biomass is particularly pronounced in the VV DInSAR phase but also in the HH–VV phase difference. Contrarily to the former, the latter shows also a scarce sensitivity to changes in soil water content. Therefore, this PolDInSAR observable is used to generate biomass maps of the analyzed test site. The predicted biomass variations are in good agreement with the collected in situ measurements, i.e., the coefficient of determination varies between 0.8 and 0.9.

Item URL in elib:https://elib.dlr.de/119623/
Document Type:Article
Title:Analyzing the Influence of Wet Biomass Changes in Polarimetric Differential SAR Interferometry at L-Band
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Brancato, VirginiaETH ZurichUNSPECIFIED
Hajnsek, IrenaDLR/HR, ETH ZurichUNSPECIFIED
Date:May 2018
Journal or Publication Title:IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:11
DOI :10.1109/JSTARS.2018.2805775
Page Range:pp. 1494-1508
Publisher:IEEE - Institute of Electrical and Electronics Engineers
Series Name:IEEE Xplore Digital Library
ISSN:1939-1404
Status:Published
Keywords:Agriculture, biomass, differential SAR interferometry DInSAR), polarimetry, soil moisture, synthetic aperture radar
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 Sicherheitsrelevante Erdbeobachtung
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Radzuweit, Sibylle
Deposited On:12 Apr 2018 09:21
Last Modified:24 Apr 2019 17:33

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