BGS Hosted Metadata
High resolution processed line aerogravity data over James Ross Island, Northern Antarctic Peninsula (1997/1998)
Airborne gravity data were collected using a Zero Length Spring Corporation (ZLS)-modified LaCoste and Romberg model S air-sea gravimeter. The meter was mounted in a gyro-stabilised, shock mounted platform at the centre of mass of the aircraft to minimise the effect of vibrations and rotational motions. GPS data were recorded with an Ashtech Z12 dual frequency receiver in the aircraft and at a fixed base station. Differential, carrier phase, kinematic GPS methods were then used to calculate all the navigational information used for the dynamic corrections of the aerogravity data. Standard processing steps were taken to convert the raw gravity data to free air anomalies, including latitude, free air and Eotvos corrections. The vertical accelerations of the aircraft, which dominate the gravity signal recorded by the meter, were calculated by double differencing GPS height measurements. In addition, a correction was made for gravimeter reading errors caused by the platform tilting when it was subjected to horizontal accelerations (Swain, 1996). After making the above corrections, the data were low pass filtered for wavelengths less than 9 km to remove short wavelength noise from the geological signal. The data were continued to a common altitude of 2050 m and levelled. Cross-over analysis at 118 intersections yielded a standard deviation of 2.9 mGal, which is within the 1-5 mGal error range typically reported for airborne gravity surveys after levelling. Comparison between airborne measurements and previous land-based gravity data (Garrett, 1990), yielded an RMS difference of ~4.5 mGal, which is within the 2 sigma range for airborne gravity data accuracy.
Simple
- Alternate title
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Polar Data Centre (PDC) record GB/NERC/BAS/PDC/01353
- Date (Publication)
- 2020-08-07
- Citation identifier
- http://www.antarctica.ac.uk/dms/metadata.php?id= / GB/NERC/BAS/PDC/01353
- Point of contact
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Organisation name Individual name Electronic mail address Role British Antarctic Survey
Custodian UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation
Jones, P., Jordan, T., Ferraccioli, F., & Ghidella, M.
Originator
- Maintenance and update frequency
- Unknown
- Keywords
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NDGO0001
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NERC OAI Harvesting
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NERC_DDC
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GCMD Parameter Valids
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EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets
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EARTH SCIENCE > Solid Earth > Geodetics/Gravity > Gravity
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BAS Free-text keywords
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Aerogeophysics
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Aerogravity
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Antarctica
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- Use limitation
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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:
Jones, P. C., Jordan, T., Ferraccioli, F., & Ghidella, M. (2020). High resolution processed line aerogravity data over James Ross Island, Northern Antarctic Peninsula (1997/1998) (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/F3A55F48-1B9B-4DA2-987D-BE63B6BF5061
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.
- Access constraints
- Other restrictions
- Other constraints
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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:
Jones, P. C., Jordan, T., Ferraccioli, F., & Ghidella, M. (2020). High resolution processed line aerogravity data over James Ross Island, Northern Antarctic Peninsula (1997/1998) (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/F3A55F48-1B9B-4DA2-987D-BE63B6BF5061
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.
- Language
- English
- Topic category
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- Geoscientific information
))
- Begin date
- 1998-12-13
- End date
- 1998-12-14
- Reference system identifier
- OGP / urn:ogc:def:crs:EPSG::4326
- Distribution format
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- Distributor contact
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Organisation name Individual name Electronic mail address Role Polar Data Centre - British Antarctic Survey
Distributor
- Hierarchy level
- Dataset
Domain consistency
- Measure identification
- INSPIRE / Conformity_001
Conformance result
- Title
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INSPIRE Data Specification on unknown theme Guidelines
- Date
- Explanation
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See the referenced specification
- Pass
- No
- Statement
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No special comments
Metadata
- File identifier
- GB_NERC_BAS_PDC_01353 XML
- Metadata language
- English
- Hierarchy level
- Dataset
- Date stamp
- 2020-08-07
- Metadata standard name
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NERC profile of ISO19115:2003
- Metadata standard version
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1.0
- Metadata author
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Organisation name Individual name Electronic mail address Role British Antarctic Survey
Point of contact
)))
