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Recent findings on the Sentinel-L geolocation accuracy using the Australian corner reflector array


Gisinger, Christoph; Balss, Ulrich; Breit, Helko; Schubert, Adrian; Garthwaite, Matthew; Small, David; Gruber, Thomas; Eineder, Michael; Fritz, Thomas; Miranda, Nuno (2018). Recent findings on the Sentinel-L geolocation accuracy using the Australian corner reflector array. In: IGARSS 2018 (IEEE International Geoscience and Remote Sensing Symposium), Valencia (E), 22 July 2018 - 27 July 2018, 6356-6359.

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 Dopplerinduced 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 (1σ) to 6 cm in range and 28 cm in azimuth for both spacecrafts when using the Interferometric Wide swath (IW) product.

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 Dopplerinduced 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 (1σ) to 6 cm in range and 28 cm in azimuth for both spacecrafts when using the Interferometric Wide swath (IW) product.

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Additional indexing

Item Type:Conference or Workshop Item (Paper), not_refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Geography
Dewey Decimal Classification:910 Geography & travel
Language:English
Event End Date:27 July 2018
Deposited On:11 Jan 2019 14:54
Last Modified:11 Jan 2019 19:30
Publisher:IEEE
ISBN:978-1-5386-7150-4
OA Status:Closed
Publisher DOI:https://doi.org/10.1109/igarss.2018.8519220

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