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Interferometric Evaluation of Sentinel-1A TOPS data

Yague-Martinez, Nestor and Rodriguez Gonzalez, Fernando and Brcic, Ramon and Shau, Robert (2015) Interferometric Evaluation of Sentinel-1A TOPS data. FRINGE 2015, 2015-03-23 - 2015-03-27, ESRIN, Frascati, Italy.

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Official URL: http://seom.esa.int/fringe2015/page_session2.php


The European radar satellite Sentinel 1A was launched in April 2014 as the first of the Copernicus Space Component. The Sentinel 1 system has been conceived to provide repeat-pass interferometric capabilities with wide area coverage for medium resolution applications. Wide-swath is achieved by employing the novel TOPS (Terrain Observation by Progressive Scans) acquisition mode. The contribution of this talk focuses on an interferometric evaluation of Sentinel-1A data. A brief description of the interferometric algorithms of the Integrated Wide Area Processor at DLR is provided. The spectral properties of TOPS data are exposed and the stringent coregistration accuracy emphasized, where a pixelwise ESD-based estimator is proposed. Burst mode data require that repeat-pass acquisitions are synchronized in order to obtain coherence over distributed scatterers. An evaluation of the common Doppler bandwidth for two stack of S1A scenes is provided. By exploiting the high sensitivity of TOPS data to the measurement of the along-track shift, an assessment of the shifts is as well provided for two scenarios. In the first place a temporal analysis is done with two stacks of acquisitions in different acquisiton geometries. Geophysical effects as diferential solid Earth tides are compensated. The outcome of this analysis indicates that a mere geometric coregistration is not enough to obtain accurate interferometric results, being necessary to compensate for orbital timing errors. The second analysis focuses on the systematic evaluation of the along-track shifts for a datatake composed by several slices, where good spatial stability is shown.

Item URL in elib:https://elib.dlr.de/96461/
Document Type:Conference or Workshop Item (Speech)
Title:Interferometric Evaluation of Sentinel-1A TOPS data
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Yague-Martinez, NestorUNSPECIFIEDhttps://orcid.org/0000-0002-4923-8525UNSPECIFIED
Brcic, RamonUNSPECIFIEDhttps://orcid.org/0000-0001-6661-9170134256103
Date:March 2015
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:Synthetic aperture radar (SAR), TOPS, Sentinel-1, Interferometry
Event Title:FRINGE 2015
Event Location:ESRIN, Frascati, Italy
Event Type:international Conference
Event Start Date:23 March 2015
Event End Date:27 March 2015
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 - Vorhaben hochauflösende Fernerkundungsverfahren (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Microwaves and Radar Institute > SAR Technology
Deposited By: Yague-Martinez, Nestor
Deposited On:29 May 2015 14:03
Last Modified:24 Apr 2024 20:02

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