Abstract
Abstract. Currently, the Sentinel-2 twin satellite constellation of the Copernicus program is in operational mode and generates high repeat acquisitions at high-latitudes during polar day. These pushbroom satellites have a large field-of-view and are therefore ideal for simultaneous extraction of glacier displacement and elevation data. In this study we showcase the capabilities of this system set-up by generating time-series of glacier flow and elevation change over Negribreen, a tidewater glacier in Svalbard which nowadays is in its surge phase.
Highlights
The Sentinel-2 twin satellite constellation is part of the operational Copernicus monitoring system, and acquires medium resolution imagery with a wide field-of-view of 270 kilometers over the Earth surface for most of its sun-lit orbit
The scope of this study is to introduce an approach that can exploit such highly redundant datasets at high latitudes, for example to monitor rapid glacier dynamical change
In this study we explore the possibility of simultaneous estimation of surface displacement and elevation change
Summary
The Sentinel-2 twin satellite constellation is part of the operational Copernicus monitoring system, and acquires medium resolution imagery with a wide field-of-view of 270 kilometers over the Earth surface for most of its sun-lit orbit. Its acquisition coverage at the equator resolves in a repetition rate of 10 days. Locations at high latitudes are observed from different angles, making across-track photogrammetry possible. This potential of Sentinel-2 has been demonstrated before by non-orthorectified images (Gaudel et al, 2017, Lacroix et al, 2018), but was limited to the calculation of a single elevation model. We use a surging glacier in Svalbard to demonstrate this potential because a glacier surge has both strong lateral and vertical changes within a short time period
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