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The 2-Look TOPS Mode: Design and Demonstration with TerraSAR-X

Yague-Martinez, Nestor and Prats, Pau and Wollstadt, Steffen and Moreira, Alberto (2019) The 2-Look TOPS Mode: Design and Demonstration with TerraSAR-X. IEEE Transactions on Geoscience and Remote Sensing. IEEE - Institute of Electrical and Electronics Engineers. DOI: 10.1109/TGRS.2019.2915797 ISSN 0196-2892

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Abstract

Burst-mode acquisition schemes achieve wide coverage at the expense of a degraded azimuth resolution, reducing therefore the performance on the retrieval of ground displacements in the azimuth direction, when interferometric acquisitions are combined. Moreover the azimuth varying line-of-sight can induce discontinuities in the interferometric phase when local azimuth displacements are present, e.g., due to ground deformation. In this contribution we propose the interferometric 2-look TOPS mode, a sustaining innovation, which records bursts of radar echoes of two separated slices of the Doppler spectrum. The spectral separation allows to exploit spectral diversity techniques, achieving sensitivities to azimuth displacements better than with StripMap, and eliminating discontinuities in the interferometric phase. Moreover some limitations of the TOPS mode to compensate ionospheric perturbations, in terms of data gaps or restricted sensitivity to azimuth shifts, are overcome. The design of 2-look TOPS acquisitions will be provided, taking the TerraSAR-X system as reference to derive achievable performances. The methodology for the retrieval of the azimuth displacement is exposed for the case of using pairs of images, as well as for the calculation of mean azimuth velocities when working with stacks. We include results with experimental TerraSAR-X acquisitions demonstrating its applicability for both scenarios.

Item URL in elib:https://elib.dlr.de/127366/
Document Type:Article
Title:The 2-Look TOPS Mode: Design and Demonstration with TerraSAR-X
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Yague-Martinez, NestorNestor.Yague (at) dlr.dehttps://orcid.org/0000-0002-4923-8525
Prats, PauPau.Prats (at) dlr.dehttps://orcid.org/0000-0002-7583-2309
Wollstadt, SteffenSteffen.Wollstadt (at) dlr.dehttps://orcid.org/0000-0003-3602-762X
Moreira, AlbertoAlberto.Moreira (at) dlr.dehttps://orcid.org/0000-0002-3436-9653
Date:2019
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1109/TGRS.2019.2915797
Publisher:IEEE - Institute of Electrical and Electronics Engineers
ISSN:0196-2892
Status:Accepted
Keywords:2-look TOPS, burst-mode, wide coverage, Synthetic Aperture Radar (SAR), SAR Interferometry, TerraSAR-X
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 - Projekt TanDEM-X
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > SAR Technology
Deposited By: Yague-Martinez, Nestor
Deposited On:07 May 2019 13:42
Last Modified:31 Jul 2019 20:25

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