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TOPS Time Series Performance Assessment with TerraSAR-X Data

Nannini, Matteo and Prats-Iraola, Pau and De Zan, Francesco and Geudtner, Dirk (2016) TOPS Time Series Performance Assessment with TerraSAR-X Data. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 3832 -3848. IEEE - Institute of Electrical and Electronics Engineers. ISSN 1939-1404.

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The TOPS (i.e., Terrain Observation by Progressive Scans) SAR mode enables a large ground coverage with an azimuth-invariant SNR whilst avoiding the drawbacks of scalloping. The implementation of TOPS, obtained by steering the antenna from aft to fore within a burst, introduces an azimuth-dependent Doppler variation on the received signal. The processing of TOPS data needs to account for this signal property, requiring additional care especially when used for SAR interferometry (InSAR) applications. In particular, achieving a high coregistration accuracy is more stringent than for stripmap modes. For the analysis of TOPS InSAR data time series, the required high coregistration accuracy is even more critical, because any small error would translate into a biased estimation of geophysical parameters, such as the surface deformation. In this context, this paper discusses the interferometric processing aspects related to TOPS and presents several analyses to evaluate the TOPS performance when processing time series. Both PS (Permanent Scatterers) and SBAS (Small BAselines Subset) techniques will be employed to perform the analysis. Two interleaved time series acquired by the TerraSAR-X sensor in TOPS and stripmap modes are used to evaluate and compare the results.

Item URL in elib:https://elib.dlr.de/103571/
Document Type:Article
Title:TOPS Time Series Performance Assessment with TerraSAR-X Data
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Date:2 February 2016
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 ISI Web of Science:Yes
Page Range:3832 -3848
Publisher:IEEE - Institute of Electrical and Electronics Engineers
Keywords:Synthetic aperture radar (SAR), terrain observation by progressive scan (TOPS), differential interferometric synthetic aperture radar (DInSAR).
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
Deposited By: Nannini, Matteo
Deposited On:23 Mar 2016 12:11
Last Modified:19 Nov 2021 20:28

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