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Sentinel-1A Calibration Support during Routine Operation

Schmidt, Kersten and Schwerdt, Marco and Castellanos Alfonzo, Gabriel and Tous Ramon, Núria (2016) Sentinel-1A Calibration Support during Routine Operation. European Conference on Synthetic Aperture Radar (EUSAR), 2016-06-06 - 2016-06-09, Hamburg, Germany.

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Abstract

Sentinel-1A (S-1A) is the first of two satellites for global Earth monitoring in C-band in the frame of the COPERNI-CUS program of the European Commission and the European Space Agency (ESA). After launch in April 2014, the calibration of the SAR instrument was performed by ESA and their partners during the commissioning phase. Addi-tionally an independent verification of the Sentinel-1A instrument calibration was undertaken by the German Aero-space Center (DLR) on behalf of ESA [1]. However, as the commissioning phase was executed under non-ideal con-ditions the strong requirement for the absolute radiometric accuracy of 1 dB (3σ) could not be achieved. In order to improve the radiometric and polarimetric performance of S-1A, further support has been given by the DLR for addi-tional calibration activities executed during routine operation. Based on the DLR SAR calibration facility and rain-forest acquisitions, the paper describes the different effects observed and gives recommendations to solve the out-standing issues. Furthermore, it is shown, that the strong radiometric requirement of Sentinel-1A is achievable.

Item URL in elib:https://elib.dlr.de/102589/
Document Type:Conference or Workshop Item (Speech)
Title:Sentinel-1A Calibration Support during Routine Operation
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Schmidt, KerstenUNSPECIFIEDhttps://orcid.org/0000-0001-7896-908XUNSPECIFIED
Schwerdt, MarcoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Castellanos Alfonzo, GabrielUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tous Ramon, NúriaUNSPECIFIEDhttps://orcid.org/0000-0002-0450-0438UNSPECIFIED
Date:2016
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:SAR Calibration, Point Targets, Sentinel-1A
Event Title:European Conference on Synthetic Aperture Radar (EUSAR)
Event Location:Hamburg, Germany
Event Type:international Conference
Event Dates:2016-06-06 - 2016-06-09
Organizer:VDE
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 - SAR Expert Support Lab
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute
Microwaves and Radar Institute > Spaceborne SAR Systems
Deposited By: Schmidt, Dr. Kersten
Deposited On:28 Jan 2016 08:41
Last Modified:21 Sep 2017 09:41

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