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A Motion Compensation Strategy for Airborne Repeat-Pass SAR Data

Brancato, Virginia and Jäger, Marc and Scheiber, Rolf and Hajnsek, Irena (2018) A Motion Compensation Strategy for Airborne Repeat-Pass SAR Data. IEEE Geoscience and Remote Sensing Letters, 15 (10), pp. 1580-1584. IEEE - Institute of Electrical and Electronics Engineers. DOI: 10.1109/LGRS.2018.2848596 ISSN 1545-598X

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Official URL: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8403314

Abstract

Generating accurate repeat-pass interferometric airborne synthetic aperture radar (SAR) products demands the precise compensation of the 3-D motion of the aircraft. This requires to estimate and correct small residual motion errors (RMEs) within the accuracy limits of the sensor navigation subsystem, e.g., using residual motion compensation (MoCo) algorithms. Because of their data-driven nature, the performance of these algorithms severely degrades for heavily decorrelated interferograms. This letter proposes a generic RME estimation and compensation strategy optimally estimating RME in a stack of SAR acquisitions, where some interferometric pairs are strongly affected by decorrelation. The algorithm works even if the whole scene decorrelates, as long as the coherence magnitude is reasonably high over short temporal and spatial baselines. The approach entails correcting the navigation data of each slave image of a one-to-many interferometric network with a cumulative correction. The summation is over the results of a precursory application of a general data-driven residual MoCo algorithm (e.g., multisquint) to interferometric pairs for which the impact of interferometric decorrelation is marginal (i.e., small temporal and/or spatial baselines). Compared to other RME correction strategies, the main appeal of the proposed approach lies in the simplicity of its implementation. The overall methodology is tested on a zero-baseline time series acquired at L-band by the German Aerospace Center’s airborne system F-SAR.

Item URL in elib:https://elib.dlr.de/121878/
Document Type:Article
Additional Information:© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Title:A Motion Compensation Strategy for Airborne Repeat-Pass SAR Data
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Brancato, VirginiaETH ZurichUNSPECIFIED
Jäger, MarcMarc.Jaeger (at) dlr.deUNSPECIFIED
Scheiber, RolfRolf.Scheiber (at) dlr.dehttps://orcid.org/0000-0002-6833-4897
Hajnsek, IrenaIrena.Hajnsek (at) dlr.deUNSPECIFIED
Date:1 October 2018
Journal or Publication Title:IEEE Geoscience and Remote Sensing Letters
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:15
DOI :10.1109/LGRS.2018.2848596
Page Range:pp. 1580-1584
Publisher:IEEE - Institute of Electrical and Electronics Engineers
ISSN:1545-598X
Status:Published
Keywords:interferometry, motion compensation (MoCo), processing, repeat-pass, residual motion errors (RMEs) estimation, synthetic aperture radar (SAR)
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 Flugzeug-SAR
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > SAR Technology
Microwaves and Radar Institute > Radar Concepts
Deposited By: Scheiber, Dr.-Ing. Rolf
Deposited On:01 Oct 2018 09:33
Last Modified:31 Jul 2019 20:19

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