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Impact of Dielectric Changes of Forest Volumes on L-Band SAR Reflectivity Profiles

Pardini, Matteo and Papathanassiou, Konstantinos and Lombardini, Fabrizio (2018) Impact of Dielectric Changes of Forest Volumes on L-Band SAR Reflectivity Profiles. IEEE Transactions on Geoscience and Remote Sensing, 56 (12), pp. 7324-7337. IEEE - Institute of Electrical and Electronics Engineers. DOI: 10.1109/TGRS.2018.2850357 ISSN 0196-2892

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Official URL: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8424543

Abstract

Synthetic Aperture Radar (SAR) Tomography (TomoSAR) allows reconstructing a vertical profile of the power backscattered by natural volumes by combining more than two SAR images acquired with slightly different incidence angles. Being an electromagnetic quantity, the profile depends on the radar frequency, polarization, and acquisition geometry, but also on the 3-D distribution of the backscattering elements and their dielectric properties. The characterization of each one of these factors is crucial to enable the extraction of physical 3-D structure attributes from TomoSAR profiles. The objective of this work is to investigate how L-band TomoSAR reflectivity profiles of forest volumes are affected by seasonal and weather-induced changes of their dielectric properties. Radiometric (e.g. ground and volume powers) and geometric (e.g. center of mass of the volume-only profiles and phase centers of the volume scattering layers) parameters have been estimated under different conditions and compared. Then, TomoSAR data sets affected by dielectric non-stationarities (i.e. changing conditions) have been considered in order to assess the invariance of each radiometric and geometric parameter. This analysis has been carried out by processing four L-band airborne TomoSAR data sets acquired before and after a rainfall, and in spring and autumn over the Traunstein forest (South of Germany).

Item URL in elib:https://elib.dlr.de/118322/
Document Type:Article
Title:Impact of Dielectric Changes of Forest Volumes on L-Band SAR Reflectivity Profiles
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Pardini, MatteoMatteo.Pardini (at) dlr.dehttps://orcid.org/0000-0003-2018-7514
Papathanassiou, KonstantinosKostas.Papathanassiou (at) dlr.deUNSPECIFIED
Lombardini, FabrizioUniversity of PisaUNSPECIFIED
Date:December 2018
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:56
DOI :10.1109/TGRS.2018.2850357
Page Range:pp. 7324-7337
Publisher:IEEE - Institute of Electrical and Electronics Engineers
ISSN:0196-2892
Status:Published
Keywords:Forest structure, synthetic aperture radar (SAR), SAR tomography (TomoSAR), dielectric changes.
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 Tandem-L Vorstudien
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Pardini, Dr.-Ing. Matteo
Deposited On:18 Jan 2018 14:18
Last Modified:19 Dec 2018 19:50

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