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Glacier Monitoring Using Frequency Domain Offset Tracking Applied to Sentinel-1 Images: A Product Performance Comparison

Amitrano, Donato, Guida, Raffaella, Di Martino, Gerardo and Iodice, Antonio (2019) Glacier Monitoring Using Frequency Domain Offset Tracking Applied to Sentinel-1 Images: A Product Performance Comparison Remote Sensing, 11 (11), 1322.

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Abstract

The Sentinel-1 mission has now reached its maturity, and is acquiring high-quality images with a high revisit time, allowing for effective continuous monitoring of our rapidly changing planet. The purpose of this work is to assess the performance of the different synthetic aperture radar products made available by the European Space Agency through the Sentinels Data Hub against glacier displacement monitoring with offset tracking methodology. In particular, four classes of products have been tested: the medium resolution ground range detected, the high-resolution ground range detected, acquired in both interferometric wide and extra-wide swath, and the single look complex. The first are detected pre-processed images with about 40, 25, and 10-meter pixel spacing, respectively. The last category, the most commonly adopted for the application at issue, represents the standard coherent synthetic aperture radar product, delivered in unprocessed focused complex format with pixel spacing ranging from 14 to 20 meters in azimuth and from approximately 2 to 6 meters in range, depending on the acquisition area and mode. Tests have been performed on data acquired over four glaciers, i.e the Petermann Glacier, the Nioghalvfjerdsfjorden, the Jackobshavn Isbræ and the Thwaites Glacier. They revealed that the displacements estimated using interferometric wide swath single look complex and high-resolution ground range detected products are fully comparable, even at computational level. As a result, considering the differences in memory consumption and pre-processing requirements presented by these two kinds of product, detected formats should be preferred for facing the application.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
NameEmailORCID
Amitrano, Donatod.amitrano@surrey.ac.uk
Guida, RaffaellaR.Guida@surrey.ac.uk
Di Martino, Gerardo
Iodice, Antonio
Date : 1 June 2019
DOI : 10.3390/rs11111322
Copyright Disclaimer : © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Uncontrolled Keywords : Synthetic aperture radar; Offset tracking; displacements; Sentinel-1; Glacier monitoring
Depositing User : Clive Harris
Date Deposited : 10 Jun 2019 07:53
Last Modified : 10 Jun 2019 07:53
URI: http://epubs.surrey.ac.uk/id/eprint/851959

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