BGS Hosted Metadata
Processed bed elevation picks from airborne radar depth sounding across East and West Antarctica (1966-1987)
This is a collection of all vintage BAS radar data that went into BEDMAP 1 (Lythe and Vaughan, 2001) that have not been released so far as line data. BEDMAP data describes the thickness of the Antarctic ice sheet. They have been collected on surveys undertaken over the past 50 years and brought together into a single database. These data have allowed the compilation of a suite of seamless digital topographic models for the Antarctic continent and surrounding ocean.
Data are provided as XYZ ASCII line data.
Simple
- Date (Creation)
- 2020-06-30
- Date (Revision)
- 2020-06-30
- Date (Publication)
- 2020-06-30
- Date (released)
- 2020-06-30
- Edition
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1.0
- Unique resource identifier
- https://doi.org/10.5285/5c6447bc-7a49-4f0d-a782-3c542c2662ae
- Codespace
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doi
- Unique resource identifier
- GB/NERC/BAS/PDC/01357
- Codespace
- Other citation details
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Please cite this item as: BEDMAP 1 consortia (2020). Processed bed elevation picks from airborne radar depth sounding across East and West Antarctica (1966-1987)(Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/5c6447bc-7a49-4f0d-a782-3c542c2662ae
- Credit
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No credit.
- Status
- Completed
- Point of contact
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Organisation name Individual name Electronic mail address Role BEDMAP 1 consortia
Author NERC EDS UK Polar Data Centre Point of contact
- Maintenance and update frequency
- As needed
- Maintenance note
- Completed
- Theme
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Aerogeophysics
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Antarctica
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Radar
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Surface elevation
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- Place
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East and West Antarctica Antarctica
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GEMET - INSPIRE themes, version 1.0
- Access constraints
- Other restrictions
- Other constraints
- no limitations to public access
- Access constraints
- Other restrictions
- Other constraints
- no limitations
- Use constraints
- License
- Other constraints
- Open Government Licence v3.0
- Use constraints
- Other restrictions
- Other constraints
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This data is governed by the NERC Data Policy: https://www.ukri.org/who-we-are/nerc/our-policies-and-standards/nerc-data-policy/
- Use constraints
- Other restrictions
- Other constraints
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Further by downloading this data the user acknowledges that they agree with the NERC data policy (), and the following conditions:
1. To cite the data in any publication as follows:
BEDMAP 1 Consortia. (2020). Processed bed elevation picks from airborne radar depth sounding across East and West Antarctica (1966-1987) (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/5C6447BC-7A49-4F0D-A782-3C542C2662AE
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.
- Unique resource identifier
- url
- Codespace
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url
- Association Type
- Cross reference
- Unique resource identifier
- doi
- Codespace
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doi
- Association Type
- Cross reference
- Unique resource identifier
- doi
- Codespace
-
doi
- Association Type
- Cross reference
- Spatial representation type
- Text, table
- Language
- English
- Character set
- UTF8
- Topic category
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- Elevation
- Geoscientific information
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- Begin date
- 1966-12-27
- End date
- 1988-02-10
- Supplemental Information
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It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk.
- Title
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European Petroleum Survey Group (EPSG) Geodetic Parameter Registry
- Date (Publication)
- 2008-11-12
- Cited responsible party
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Organisation name Individual name Electronic mail address Role European Petroleum Survey Group
Publisher
- Unique resource identifier
- urn:ogc:def:crs:EPSG::3031
- Version
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6.18.3
Distributor
- Distributor contact
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Organisation name Individual name Electronic mail address Role NERC EDS UK Polar Data Centre Distributor
- Distributor format
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Name Version text/plain
- Units of distribution
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bytes
- Transfer size
- 65011712
- OnLine resource
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Protocol Linkage Name WWW:LINK-1.0-http--link
https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=5c6447bc-7a49-4f0d-a782-3c542c2662ae Get Data
- Hierarchy level
- Dataset
- Statement
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Methodology:
RESPAC was the British Antarctic Survey radio-echo sounding database. It included data collected by BAS from 1966 to 1987.
A number of different radar systems were used to collect ice thickness and navigation data during these campaigns. All data in RESPAC was incorporated into both the BEDMAP1 (Lythe et al. 2001) and Bedmap2 (Fretwell et al. 2013) compilations. Here we provide basic channels containing information on flight line, data-point location, and ice thickness measurements which are described in the table below. It should be noted that early surveys (prior to 1987) did not use GPS positioning, but were located using a variety of methods such as celestial navigation, inertial avionics (INS), Doppler avionics and dead-reckoning. Furthermore, various processes of "refixing" were applied to most flightlines, with distributed navigational uncertainties through the flight and at fixed points during the flight to the map-position of known landmarks. In summary, all navigational data have large positional uncertainties of up to ~5 km (Drewry, 1983). It is assumed that all radar data processing is accurate and consistent; however, we do not consider it reasonable to make estimates of change in ice thickness from this dataset without considering the potential large navigation errors, varied collection systems and processing steps.
Data is available in a single file, split by the field season in which it was collected. For example, data from the 1966/67 field season will appear as L6667 (line) in the database.
Channel description:
Basic Channels Name Description
Current_record Linear time in seconds since 1st Jan 1950.
Season Season in which survey flights were undertaken
Lon Longitude WGS 1984
Lat Latitude WGS 1984
x x projected meters, coordinate system- Polar stereographic
y y projected meters, coordinate system- Polar stereographic
Height_WGS1984 Aircraft altitude (meters) in WGS 1984
Radar
tIce Ice thickness (m)
SurfElev Ice surface elevation (m)
BedElev Bed elevation (m)
*Projected coordinates (x and y) are in Polar Stereographic:
Latitude of natural origin: -71
Longitude of natural origin: 0
Scale factor at natural origin: 0.994
False easting 0
False northing 2072760.109
Metadata
- File identifier
- 5c6447bc-7a49-4f0d-a782-3c542c2662ae XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Hierarchy level name
-
dataset
- Date stamp
- 2020-06-30
- Metadata standard name
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ISO 19115 Geographic Information - Metadata
- Metadata standard version
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ISO 19115:2003(E)
- Metadata author
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Organisation name Individual name Electronic mail address Role NERC EDS UK Polar Data Centre Point of contact
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