Dataset
ESA Antarctic Ice Sheet Climate Change Initiative (Antarctic_Ice_Sheet_cci): Antarctic Ice Sheet monthly velocity from 2017 to 2020, derived from Sentinel-1, v1
Abstract
This dataset contains monthly gridded ice velocity maps of the Antarctic Ice Sheet derived from Sentin
el-1 data acquired between 2017-01-01 and 2020-08-31. It was generated by ENVEO, as part of the ESA Antarctic Ice Sheet Climate Change Initiative project (Antarctic_Ice_Sheet_cci).
The surface velocity is derived by applying feature tracking techniques using Sentinel-1 synthetic aperture radar (SAR) data acquired in the Interferometric Wide (IW) swath mode. Ice velocity is provided at 200m grid spacing in Polar Stereographic projection (EPSG: 3031). The horizontal velocity components are provided in true meters per day, towards easting and northing direction of the grid. The vertical displacement is derived from a digital elevation model. Provided is a NetCDF file with the velocity components: vx, vy, vz, along with maps showing the magnitude of the horizontal components, the valid pixel count and uncertainty. The product combines all ice velocity maps, based on 6- and 12-day repeats, acquired within a single month in a monthly averaged product.
Details
| Previous Info: |
No news update for this record
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| Previously used record identifiers: |
No related previous identifiers.
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| Access rules: |
Public data: access to these data is available to both registered and non-registered users.
Use of these data is covered by the following licence: http://licences.ceda.ac.uk/image/data_access_condition/esacci_icesheets_antarctic_terms_and_conditions.pdf. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record. |
| Data lineage: |
Data were processed by ENVEO as part of the ESA Antarctic Ice sheet CCI project and are archived on the ENVEO Cryoportal (http://cryoportal.enveo.at). They have been supplied to CEDA in the context of the ESA CCI Open Data Portal Project |
| Data Quality: |
Data are as given by the data provider. For more information see the Antarctic Ice Sheets CCI project documentation
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| File Format: |
Data are in NetCDF format
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Process overview
Instrument/Platform pairings
| Sentinel 1 Synthetic Aperture Radar (SAR) | Deployed on: Sentinel 1A |
| Sentinel 1 Synthetic Aperture Radar (SAR) | Deployed on: Sentinel 1B |
Computation Element: 1
| Title | Derivation of the Antarctic Ice Sheet CCI Ice Velocity v1 dataset from Sentinel-1 |
| Abstract | The surface velocity is derived by applying feature tracking techniques using Sentinel-1 synthetic aperture radar (SAR) data acquired in the Interferometric Wide (IW) swath mode. Ice velocity is provided at 200m grid spacing in Polar Stereographic projection (EPSG: 3031). The horizontal velocity components are provided in true meters per day, towards easting and northing direction of the grid. The vertical displacement is derived from a digital elevation model. Provided is a NetCDF file with the velocity components: vx, vy, vz, along with maps showing the magnitude of the horizontal components, the valid pixel count and uncertainty. The product combines all ice velocity maps, based on 6- and 12-day repeats, acquired within a single month in a monthly averaged product. |
| Input Description | None |
| Output Description | None |
| Software Reference | None |
| Output Description | None |
- var_id: crs
- units: m/day
- var_id: land_ice_surface_easting_stddev
- units: m/day
- var_id: land_ice_surface_easting_velocity
- units: m/day
- var_id: land_ice_surface_measurement_count
- units: m/day
- var_id: land_ice_surface_northing_stddev
- units: m/day
- var_id: land_ice_surface_northing_velocity
- units: m/day
- var_id: land_ice_surface_velocity_magnitude
- units: m/day
- var_id: land_ice_surface_vertical_velocity
- units: m
- var_id: x
- standard_name: projection_x_coordinate
- long_name: x coordinate of projection
- names: projection_x_coordinate, x coordinate of projection
- units: m
- var_id: y
- standard_name: projection_y_coordinate
- long_name: y coordinate of projection
- names: projection_y_coordinate, y coordinate of projection
Co-ordinate Variables
- long_name: time
- standard_name: time
- var_id: time
- names: time
Temporal Range
2017-01-01T00:00:00
2020-08-31T23:59:59
Geographic Extent
-56.0000° |
||
-180.0000° |
180.0000° |
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-90.0000° |