BGS Hosted Metadata
Processed line aeromagnetic data over the Dufek Massif, Pensacola Mountains (1998/99 season)
A British Antarctic Survey Twin Otter and survey team acquired 8,300 line-km of magnetic data during the Austral summer of 1998/99. Gravity and radio-echo data were acquired simultaneously with the magnetic data at a compromise constant barometric height of 2,200 m, which provides a terrain clearance of 100 m over the highest peaks. Two separate surveys were conducted; one at 5 km line spacing (tie lines at 20 km) over and stretching beyond the southern extent of the Forrestal range (main survey), and one at 2 km line spacing (tie lines at 8 km) covering the Dufek Massif (detailed survey). Wing-tip-mounted cesium vapour magnetometers acquired data at 10 Hz, which was resampled to 1 Hz after deletion of data corrupted by the radio echo transmissions. It is not possible to compensate the magnetic data for maneuver noise after this process as the data are under-;sampled with respect to maneuver noise. However, because gravity data was being acquired at the same time, turbulent conditions were avoided and so maneuver noise was at a minimum. Ashtech Z12 dual frequency GPS receivers were used for survey navigation. Pseudorange data were supplied to a Picodas PNAV navigation interface computer, which was used to guide the pilot along the pre-planned survey lines. The actual flight path was recovered, using carrier-phase, continuous, kinematic GPS processing techniques. All magnetic and pseudorange navigation data were recorded at 1 Hz on a Picodas PDAS 1000, PC-based data acquisition system.
Data were de-spiked and then smoothed (~100 m low pass filter), before re-sampling from 10 to 1 Hz. The data were IGRF corrected, leveled and reduced to the pole in the field. A 2.5 km cell grid was produced. The negative bias to the anomaly amplitudes is a result of the poorly defined IGRF in this area.
We present here the processed line aeromagnetic data acquired using scintrex cesium magnetometers mounted on the BAS aerogeophysical equiped Twin Otter.
Data are provided as XYZ ASCII line data.
Simple
- Date (Creation)
- 2020-06-29
- Date (Revision)
- 2020-06-29
- Date (Publication)
- 2020-06-29
- Date (released)
- 2020-06-29
- Edition
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1.0
- Unique resource identifier
- https://doi.org/10.5285/c8d67254-7a66-4ec4-9df8-9dc1c254add5
- Codespace
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doi
- Unique resource identifier
- GB/NERC/BAS/PDC/01345
- Codespace
- Other citation details
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Please cite this item as: Ferris, J. (2020). Processed line aeromagnetic data over the Dufek Massif, Pensacola Mountains (1998/99 season) (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/c8d67254-7a66-4ec4-9df8-9dc1c254add5
- Credit
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No credit.
- Status
- Completed
- Point of contact
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Organisation name Individual name Electronic mail address Role British Antarctic Survey Ferris, Julie
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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Aeromagnetics
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Antarctica
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- Place
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Dufek Massif Antarctica
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Pensacola Mountains Antarctica
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GEMET - INSPIRE themes, version 1.0
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- no limitations to public access
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- no limitations
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- Other constraints
- Open Government Licence v3.0
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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/
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- Other restrictions
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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:
Ferris, J. (2020). Processed line aeromagnetic data over the Dufek Massif, Pensacola Mountains (1998/99 season) (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/C8D67254-7A66-4EC4-9DF8-9DC1C254ADD5
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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url
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- Cross reference
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doi
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- Unique resource identifier
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doi
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- Cross reference
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url
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- Cross reference
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- url
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url
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- Spatial representation type
- Text, table
- Language
- English
- Character set
- UTF8
- Topic category
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- Geoscientific information
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- Begin date
- 1999-01-01
- End date
- 1999-01-31
- 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
- 14680064
- 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=c8d67254-7a66-4ec4-9df8-9dc1c254add5 Get Data
- Hierarchy level
- Dataset
- Statement
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Methodology:
DUFEK aeromagnetic dataset available here includes fully processed and levelled products. Details of data acquisition and processing steps are presented in Ferris et al., (1998, 2003).
Channel description:
Basic Channels
x x projected meters*
y y projected meters *
Lon Longitude WGS 1984,
Lat Latitude WGS 1984,
Mag processing channels
MagF Final magnetic data value before levelling (nT)
MagL Statistically levelled magnetic data. Tie lines levelled to normal lines initially. (nT)
*Projected coordinates (x and y) are in Lambert conic conformal with two standard parallels defined as follows:
Latitude of false origin: -80
Longitude of false origin: 80
Latitude of 1st standard parallel -83
Latitude of 2nd standard parallel -77
False easting 2000000
False northing 2000000
Positioning for the Dufek survey uses Ashtech Z12 dual frequency GPS recievers (Ferris et al, 2003). Positions are calculated for the phase centre of the aircraft antenna. All positions (Lat, lon and height) are referred to the WGS1984 ellipsoid.
Metadata
- File identifier
- c8d67254-7a66-4ec4-9df8-9dc1c254add5 XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Hierarchy level name
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dataset
- Date stamp
- 2020-06-29
- 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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