Abstract:
These files are surface elevation determined from swath processing of data acquired by the interferometric radar altimeter CryoSat-2. The data have been collected and processed over the Greenland Ice Sheet between 2011 and 2016. These data have been processed by the University of Edinburgh and are made publicly available as part of the European Space Agency funded CryoSat+ CryoTop Evolution STSE Study (ESA Contract 4000116874) involving the University of Edinburgh, isardSat UK, University of Leeds-CPOM, ENVEO.
Keywords:
Altimetry, Climate, CryoSat-2, Elevation, Greenland Ice Sheet
Gourmelen, N., & Weissgerber, F. (2018). Swath elevation from CryoSat-2 over the Greenland Ice Sheet, 2011-2016 (Version None) [Data set]. Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/d762710b-562b-41a6-b9b4-adb26bfad4c6
| Access Constraints: | No restrictions apply. |
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| Use Constraints: | This data is supplied under Open Government Licence v3 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. Further by downloading this data the user acknowledges that they agree to cite both the data and the Gourmelen et al. (2017) literature reference in any publication. |
| Creation Date: | 2018-02-22 |
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| Dataset Progress: | Complete |
| Dataset Language: | English |
| ISO Topic Categories: |
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| Parameters: |
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| Personnel: | |
| Name | UK PDC |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Noel Gourmelen |
| Role(s) | Technical Contact, Investigator |
| Organisation | University of Edinburgh |
| Name | Flora Weissgerber |
| Role(s) | Technical Contact, Investigator |
| Organisation | University of Edinburgh |
| Name | Maria Jose Escorihuela |
| Role(s) | Investigator |
| Organisation | isardSat |
| Name | Monica Roca |
| Role(s) | Investigator |
| Organisation | isardSat |
| Name | Anna Hogg |
| Role(s) | Investigator |
| Organisation | University of Leeds |
| Name | Jan Wuite |
| Role(s) | Investigator |
| Organisation | ENVEO |
| Name | Tom Nagler |
| Role(s) | Investigator |
| Organisation | ENVEO |
| Name | Mark Drinkwater |
| Role(s) | Technical Contact |
| Organisation | European Space Agency |
| Parent Dataset: | N/A |
| Reference: | Gourmelen, N, Escorihuela, M, Shepherd, A, Foresta, L, Muir, A, Garcia-Mondejar, A, Roca, M, Baker, S & Drinkwater, MR 2017, 'CryoSat-2 swath interferometric altimetry for mapping ice elevation and elevation change' Advances in Space Research. DOI: 10.1016/j.asr.2017.11.014 | |
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| Quality: | There is a minimal amount of editing of the data as to provide maximum flexibility. The user should therefore use caution, as the dataset will contain measurements of variable quality. The user should make use of the quality estimator provided, e.g. signal coherence and signal power. A typical minimum value of coherence is 0.8 and a typical minimum value of power is -170. It is also recommended to the user to check for remaining errors using a reference DEM (e.g. GIMPDEM, arcticDEM) as to identify remaining data blunders that would originate from sensor or processing errors. Details of data quality, potential issues, and validations can be found in Gourmelen et al., 2017 and in literature listed here. | |
| Lineage: | The swath elevation data are produced from CryoSat-2 as described in the following paper: Gourmelen, N, Escorihuela, M, Shepherd, A, Foresta, L, Muir, A, Garcia-Mondejar, A, Roca, M, Baker, S & Drinkwater, M R 'CryoSat-2 swath interferometric altimetry for mapping ice elevation and elevation change' (2017) Advances in Space Research. DOI: 10.1016/j.asr.2017.11.014 |
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| Temporal Coverage: | |
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| Start Date | 2011-01-01 |
| End Date | 2016-12-31 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | 59 |
| Northernmost | 84 |
| Longitude | |
| Westernmost | -74 |
| Easternmost | 7 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Location: | |
| Location | Arctic |
| Detailed Location | Greenland Ice Sheet |
| Data Collection: | Data was collected using the CryoSat-2 spaceborne interferometric radar altimeter. |
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| Distribution: | |
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| Distribution Media | Online FTP |
| Distribution Size | N/A |
| Distribution Format | netCDF |
| Fees | N/A |
| Data Storage: | Data are distributed as netcdf files containing 7 fields: Latitude (lat) Longitude (lon) Elevation above the ellipsoid (elev) Power in dB (powerdB) Coherence (coh) Sample number (sampleNb) Waveform number (wf_number) The last 2 parameters are given so that users can retrace the origin of a given measurement to the original, L1b, CryoSat data. The file name follows the CryoSat2's file name convention (http://wiki.services.eoportal.org/tiki-index.php?page=CryoSat+Wiki), replacing the string for 'L1B' by '2S' as in level 2 swath product. A pdf dataset user manual is also available. |