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Ice Velocity (GAMMA)
| Product Code & Name |
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Ice Velocity
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| Contact |
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Tazio Strozzi, Gamma Remote Sensing, Worbstrasse 225, 3073 Gümligen (BE), SWITZERLAND, strozzi () gamma-rs.ch
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| Overview |
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Knowledge on glacier ice velocity provides a better understanding of a wide range of processes related to glacier dynamics, for example glacier mass flux, flow modes and flow instabilities (e.g. surges), sub-glacial processes (e.g. erosion), and the development of glacier lakes and associated hazards. In addition, the comparison of the spatio-temporal variations of glacier velocities both within and between regions will improve understanding of climate change impacts. Satellite SAR missions make it possible to operationally map and monitor glacier flow on a nearly global scale using offset-tracking methods. With Sentinel-1 Level 1 SLC data, downloaded from the Scientific Data Hub, the retrieval of ice surface velocity maps over the Svalbard Archipelago is possible since August 2014 every 12 or 24 days. Horizontal surface velocity data in m/day are provided together with a quality measure, a header file describing the input data and validation, and a quick-look image of the product in GeoTIFF format.
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| Data Portals |
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| Validation Status |
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Processor qualified and operational. Verification of selected glaciers.
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| User Guide |
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Product User Guide (PUG), ESA Glacier_CCI Project, Version 1.4 22.02.2016
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| Algorithm Theoretical Basis Document |
Algorithm Theoretical Basis Document Phase 2 (ATBD), ESA Glacier_CCI Project, Version 2.1 25.11.2014.
F. Paul, T. Bolch, A. Kääb, T. Nagler, C. Nuth, K. Scharrer, A. Shepherd, T. Strozzi, F. Ticconi, R. Bhambri, E. Berthier, S. Bevan, N. Gourmelen, T. Heid, S. Jeong, M. Kunz, T.R. Lauknes, A. Luckman, J. Merryman, G. Moholdt, A. Muir, J. Neelmeijer, M. Rankl, J. Van Looy and T. Van Niel, The glaciers climate change initiative: Methods for creating glacier area, elevation change and velocity products, Remote Sensing of Environment, 162: 408–426, doi: 10.1016/j.rse.2013.07.043, 2015.
Strozzi T., A. Kouraev, A. Wiesmann, U. Wegmüller, A. Sharov and C. Werner, Estimation of Arctic glacier motion with satellite L-band SAR data, Remote Sensing of Environment, 112:636-645, doi:10.1016/j.rse.2007.06.2007, 2008.
Strozzi T., A. Luckman, T. Murray, U. Wegmüller, and C. Werner, Glacier motion estimation using SAR offset-tracking procedures, IEEE Transactions on Geoscience and Remote Sensing, Vol. 40, No. 11, pp. 2384-2391, November 2002.
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| Spatial Coverage & Resolution |
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Svalbard Archipelago (Norway) at 100 m posting
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| Temporal Coverage & Resolution |
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From 2015.08.02 onwards every 12 or 24 days
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| Platform(s) |
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Sentinel-1
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| Sensor(s) |
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C-SAR
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| Data Format (s) |
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ASCII file (csv format) with header file description (xml format) and quick-look image (GeoTIFF format)
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| Version |
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Version 04
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| Producers |
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Gamma Remote Sensing
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| Data Policy |
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Open
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| Access |
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Products are provided on demand. Access via unique HTTP link.
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