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Remote Sens. 2015, 7(7), 9431-9449;

Sentinel-1A Product Geolocation Accuracy: Commissioning Phase Results

Remote Sensing Laboratories, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
ESA-ESRIN, Via Galileo Galilei, 00044 Frascati, Italy
ESA-ESTEC, Keplerlaan 1, 2200 AG Noordwijk, The Netherlands
Author to whom correspondence should be addressed.
Academic Editors: Richard Müller and Prasad S. Thenkabail
Received: 17 May 2015 / Revised: 25 June 2015 / Accepted: 14 July 2015 / Published: 22 July 2015
Full-Text   |   PDF [2443 KB, uploaded 23 July 2015]   |  


Sentinel-1A (S1A) is an Earth observation satellite carrying a state-of-the-art Synthetic Aperture Radar (SAR) imaging instrument. It was launched by the European Space Agency (ESA) on 3 April 2014. With the end of the in-orbit commissioning phase having been completed at the end of September 2014, S1A data products are already consistently providing highly accurate geolocation. StripMap (SM) mode products were acquired regularly and tested for geolocation accuracy and consistency during dedicated corner reflector (CR) campaigns. At the completion of this phase, small geometric inconsistencies had been understood and mitigated, with the high quality of the final product geolocation estimates reflecting the mission’s success thus far. This paper describes the measurement campaign, the methods used during geolocation estimation, and presents best estimates of the product Absolute Location Error (ALE) available at the beginning of S1A’s operational phase. View Full-Text
Keywords: synthetic aperture radar (SAR); Sentinel-1A; geolocation calibration/validation synthetic aperture radar (SAR); Sentinel-1A; geolocation calibration/validation

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Schubert, A.; Small, D.; Miranda, N.; Geudtner, D.; Meier, E. Sentinel-1A Product Geolocation Accuracy: Commissioning Phase Results. Remote Sens. 2015, 7, 9431-9449.

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