Abstract:
During the 2001-02 field season a regional survey was flown on a 10 km line spacing grid over the drainage basin of the Rutford Ice stream (West Antarctica), as part of the TORUS (Targeting ice stream onset regions and under-ice systems) project. We present here the bed elevation picks from airborne radar depth sounding collected using the "BAS-built" radar depth sounding system mounted on the BAS aerogeophysical equipped Twin Otter aircraft.
Data are provided as XYZ ASCII line data
Keywords:
Antarctic, aerogeophysics, ice thickness, radar, surface elevation
Corr, H., & Smith, A. (2020). Processed bed elevation picks from airborne radar depth sounding across Ellsworth Land (2001) (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/4b2ccda1-91ec-4c57-9ae0-07b9a387f352
| Use Constraints: | This data is covered by a UK Open Government Licence (http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/) Further by downloading this data the user acknowledges that they agree with the NERC data policy (http://www.nerc.ac.uk/research/sites/data/policy.asp), and the following conditions: 1. To cite the data in any publication as follows: Corr, H., & Smith, A. (2020). Processed bed elevation picks from airborne radar depth sounding across Ellsworth Land (2001) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/4B2CCDA1-91EC-4C57-9AE0-07B9A387F352 2. The user recognizes the limitations of data. Use of the data is at the users' own risk, and there is no warranty as to the quality or accuracy of any data, or the fitness of the data for your intended use. The data are not necessarily fully quality assured and cannot be expected to be free from measurement uncertainty, systematic biases, or errors of interpretation or analysis, and may include inaccuracies in error margins quoted with the data. |
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| Creation Date: | 2019-12-04 |
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| Dataset Progress: | Complete |
| Dataset Language: | English |
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| Parameters: |
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| Personnel: | |
| Name | Mr Hugh Corr |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | PDC BAS |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Andrew M Smith |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Parent Dataset: | N/A |
| Reference: | Corr, H., Ferraccioli, F., Frearson, N., Jordan, T.A., Robinson, C., Armadillo, A., Caneva, G., Bozzo, E. & Tabacco, I.E., 2007. Airborne Radio-Echo Sounding of the Wilkes Subglacial Basin, the Transantarctic Mountains, and the Dome C Region. in The Italian-British Antarctic Geophysical and Geological Survey in Northern Victoria Land 2005-06-Towards the International Polar Year 2007-08., pp. 55-63, eds. Bozzo, E. & Ferraccioli, F. Terra Antartica Reports. Processing references: Fremand, A. C., Bodart, J. A., Jordan, T. A., Ferraccioli, F., Robinson, C., Corr, H. F., & Vaughan, D. G. (2022). British Antarctic Survey''s Aerogeophysical Data: Releasing 25 Years of Airborne Gravity, Magnetic, and Radar Datasets over Antarctica. Earth System Science Data Discussions, 1-49. https://doi.org/10.5194/essd-14-3379-2022 Corr, H., Popple, M., 1994. Airborne radio echo sounding on the Evans flowline, Ronne ice shelf. In: Oerter, H. (Ed.), Filchner-Ronne Ice Shelf Programme 8. Alfred-Wegener-Institute for Polar and Marine Research, Bremerhaven, pp. 9-11. |
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| Quality: | The following parameters have no values: segY_name, traceNum, priNum, surfPickloc, bedPickloc | |
| Lineage: | Radar data were collected using the "BAS-built" radar echo sounding system (Corr and Popple, 1994; Fremand, Bodart et al., 2022). The TORUS survey involved the collection of a total of approximately 9,500 km of line data along 15 flights, with 10 km spacing. The airborne ice sounding radar system used a 4 µs linear frequency modulated pulse in addition to a standard short 0.25 us pulse. Data provided here includes picks of surface and ice sheet bed elevation. Note a single flight may contain data from two or more SEGY files, identified in the SEGYname channel. Surface elevation is derived from radar altimeter for ground clearance < 750 m, and the PASIN system for higher altitudes. Channel description: Basic Channels Name Description Date UTC date (YYYY/MM/DD) Time UTC time (HH:MM:SS.SS) FlightID Sequential flight number and survey ID e.g. W12 Line_no Line Number e.g. LW200.1 Lon Longitude WGS 1984 Lat Latitude WGS 1984 x x projected meters* y y projected meters* Height_WGS1984 Aircraft altitude (meters) in WGS 1984 Radar surfElev Surface elevation (m) bedElev Ice bed elevation, derived by subtracting tice from surfElev (m) tIce Ice thickness, derived from bedPickLoc and surfPickLoc (m). * Projected coordinates (x and y) are in Lambert conic conformal with two standard parallels defined as follows: Latitude of natural origin: -71 Longitude of natural origin: 0 Scale factor at natural origin 0.994 False easting 0 False northing 2082760.109 |
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| Temporal Coverage: | |
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| Start Date | 2001-11-21 |
| End Date | 2001-12-11 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -78.2 |
| Northernmost | -76 |
| Longitude | |
| Westernmost | -93.8 |
| Easternmost | -82.1 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Data Resolution: | |
| Latitude Resolution | N/A |
| Longitude Resolution | N/A |
| Horizontal Resolution Range | 30 meters - < 100 meters |
| Vertical Resolution | N/A |
| Vertical Resolution Range | N/A |
| Temporal Resolution | N/A |
| Temporal Resolution Range | N/A |
| Location: | |
| Location | Antarctica |
| Detailed Location | Ellsworth Land |
| Sensor(s): |
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| Source(s): |
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| Distribution: | |
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| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 60 MB |
| Distribution Format | ASCII |
| Fees | N/A |
| Data Storage: | This dataset constains 1 ASCII XYZ file: -TORUS_RadarByFlight.XYZ ~60MB |