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Verifying the Geometric Accuracy of Sentinel-1A and Sentinel-1B Using L0- Products

Schmidt, Kersten and Tous Ramon, Núria and Reimann, Jens and Schwerdt, Marco (2018) Verifying the Geometric Accuracy of Sentinel-1A and Sentinel-1B Using L0- Products. In: 2014 8th European Conference on Antennas and Propagation (EuCAP). European Conference on Antennas and Propagation (EuCAP), 2018-04-09 - 2018-04-13, London, United Kingdom.

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Abstract

The geometric accuracy of Sentinel-1 is usally derived from level-1 products in Stripmap mode using accurate surveyed corner reflector positions. While the range offset is found to be low (~30 cm) an azimuth offset of about 2 m remains. The study investigates the reason for the geometric offsets by deriving the geometric parameters from L0-data. Therefore the pulse round-trip time is analyzed from transmission to reception of a point target's backscatter including a simple pulse compression in range and azimuth. Finally, the azimuth offset is reduced to about 15 cm which indicates an artificial bias arising from SAR processing.

Item URL in elib:https://elib.dlr.de/117950/
Document Type:Conference or Workshop Item (Speech)
Title:Verifying the Geometric Accuracy of Sentinel-1A and Sentinel-1B Using L0- Products
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schmidt, KerstenKersten.Schmidt (at) dlr.dehttps://orcid.org/0000-0001-7896-908X
Tous Ramon, NúriaNuria.TousRamon (at) dlr.dehttps://orcid.org/0000-0002-0450-0438
Reimann, Jensjens.reimann (at) dlr.dehttps://orcid.org/0000-0002-0650-9073
Schwerdt, MarcoMarco.Schwerdt (at) dlr.dehttps://orcid.org/0000-0002-0045-3726
Date:2018
Journal or Publication Title:2014 8th European Conference on Antennas and Propagation (EuCAP)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Status:Published
Keywords:Sentinel-1, Geometric Calibration, Point targets
Event Title:European Conference on Antennas and Propagation (EuCAP)
Event Location:London, United Kingdom
Event Type:international Conference
Event Dates:2018-04-09 - 2018-04-13
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 - SAR-Missions
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Spaceborne SAR Systems
Deposited By: Schmidt, Dr. Kersten
Deposited On:08 Jan 2018 12:16
Last Modified:31 Jul 2019 20:15

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