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Recent Findings on the Sentinel-1 Geolocation Accuracy using the Australian Corner Reflector Array

Gisinger, Christoph and Balss, Ulrich and Breit, Helko and Schubert, Adrian and Garthwaite, Matthew and Small, David and Gruber, Thomas and Eineder, Michael and Fritz, Thomas and Miranda, Nuno (2018) Recent Findings on the Sentinel-1 Geolocation Accuracy using the Australian Corner Reflector Array. In: 2018 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), pp. 6356-6359. IGARSS 2018, 22.-27. Jul. 2018, Valencia, Spanien. DOI: 10.1109/IGARSS.2018.8519220

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Abstract

Synthetic Aperture Radar (SAR) satellites observe range and azimuth geometric accuracies at the low centimeter level. The accuracy of geolocation is driven by several aspects, e.g. orbit determination, SAR image processing, or atmospheric error correction. Our paper concentrates on the Sentinel-1 mission and the compensation of the platform motion effects in the geolocation, which were found to limit the best possible geolocation capabilities of Sentinel-1. The key to advance the geolocation results is the rigorous compensation of the bistatic effect in azimuth, and the correction of the Doppler-induced shifts in range. First results for Sentinel-1 at the Australian reflector Array consisting of 40 Corner Reflector (CR) show consistent improvement in the geolocation (1 sigma) to 6 cm in range and 28 cm in azimuth for both spacecrafts when using the Interferometric Wide swath (IW) product.

Item URL in elib:https://elib.dlr.de/120640/
Document Type:Conference or Workshop Item (Speech)
Title:Recent Findings on the Sentinel-1 Geolocation Accuracy using the Australian Corner Reflector Array
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gisinger, Christophchristoph.gisinger (at) dlr.deUNSPECIFIED
Balss, Ulrichulrich.balss (at) dlr.deUNSPECIFIED
Breit, HelkoHelko.Breit (at) dlr.deUNSPECIFIED
Schubert, Adrianrsl, universität zürichUNSPECIFIED
Garthwaite, Matthewgeoscience australiaUNSPECIFIED
Small, DavidRSL, Universität ZürichUNSPECIFIED
Gruber, ThomasTU MünchenUNSPECIFIED
Eineder, Michaelmichael.eineder (at) dlr.deUNSPECIFIED
Fritz, Thomasthomas.fritz (at) dlr.deUNSPECIFIED
Miranda, NunoESRIN, ESAUNSPECIFIED
Date:July 2018
Journal or Publication Title:2018 IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.1109/IGARSS.2018.8519220
Page Range:pp. 6356-6359
Status:Published
Keywords:radar remote sensing, spaceborne radar, geodesy, synthetic aperture radar, geolocation
Event Title:IGARSS 2018
Event Location:Valencia, Spanien
Event Type:international Conference
Event Dates:22.-27. Jul. 2018
Organizer:IEEE
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-Methodology
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Deposited By: Gisinger, Christoph
Deposited On:28 Jun 2018 10:51
Last Modified:04 Dec 2018 12:21

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