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Coherence-based SAR tomography for spaceborne applications

Nannini, Matteo and Martone, Michele and Rizzoli, Paola and Prats, Pau and Rodriguez Cassola, Marc and Reigber, Andreas and Moreira, Alberto (2019) Coherence-based SAR tomography for spaceborne applications. Remote Sensing of Environment, 225, pp. 107-114. Elsevier. doi: 10.1016/j.rse.2019.01.040. ISSN 0034-4257.

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Official URL: https://www.sciencedirect.com/science/article/abs/pii/S0034425719300446?via%3Dihub


Future SAR missions will provide three-dimensional images of semi-transparent media, such as vegetation and ice, through SAR tomography. Access to information on the internal structure of these volume scatterers is a key factor for a better understanding of ecosystem dynamics and climate change. Because of this, several concepts are nowadays examined to implement SAR tomography in a spaceborne framework. In order to do that, it is necessary to gather different observations of the area of interest. Unfortunately, a consequence of the time that elapses between acquisitions is that the electromagnetic properties of the medium may vary. This implies that, there may be inconsistencies in the acquired data, leading to errors in the final inversion. A solution to partially cope with this temporal decorrelation, is to acquire data employing two or more sensors operating with a reduced (or even absent) temporal gap and then to collect several acquisitions at different time instants. By means of this imaging concept, the required line-of-sight diversity is granted and the desired resolution in the height direction ensured. In this way, sets of temporal decorrelation-free interferometric coherences can be built and the vertical scattering profile can be retrieved via coherence-based tomography. This contribution analyses a two-sensor system like TanDEM-X, Tandem-L , or SAOCOM-CS. In particular, the potential of coherence-based tomography are shown with data acquired with the TanDEM-X sensors for boreal and Amazon forest. In addition, a technique to partially cope with temporal decorrelation through covariance matrix filtering is also presented in the paper.

Item URL in elib:https://elib.dlr.de/127009/
Document Type:Article
Title:Coherence-based SAR tomography for spaceborne applications
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Nannini, MatteoUNSPECIFIEDhttps://orcid.org/0000-0003-3523-9639UNSPECIFIED
Martone, MicheleUNSPECIFIEDhttps://orcid.org/0000-0002-4601-6599UNSPECIFIED
Rizzoli, PaolaUNSPECIFIEDhttps://orcid.org/0000-0001-9118-2732UNSPECIFIED
Prats, PauUNSPECIFIEDhttps://orcid.org/0000-0002-7583-2309UNSPECIFIED
Reigber, AndreasUNSPECIFIEDhttps://orcid.org/0000-0002-2118-5046UNSPECIFIED
Moreira, AlbertoUNSPECIFIEDhttps://orcid.org/0000-0002-3436-9653UNSPECIFIED
Date:May 2019
Journal or Publication Title:Remote Sensing of Environment
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 107-114
Keywords:Synthetic Aperture Radar (SAR), SAR Tomography, Companion Satellites, Bi-static SAR, Volume Scatterers, Vegetation.
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Aircraft SAR
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > SAR Technology
Microwaves and Radar Institute > Spaceborne SAR Systems
Deposited By: Nannini, Matteo
Deposited On:04 Apr 2019 08:51
Last Modified:31 Oct 2023 14:40

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