410ee2f9-2d22-4155-aaed-43b93a7c3d62 eng utf8 dataset dataset NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom polardatacentre@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact 2018-03-16 ISO 19115 Geographic Information - Metadata ISO 19115:2003(E) European Petroleum Survey Group (EPSG) Geodetic Parameter Registry 2008-11-12 publication European Petroleum Survey Group EPSGadministrator@iogp.org https://www.epsg-registry.org/ EPSG Geodetic Parameter Dataset The EPSG Geodetic Parameter Dataset is a structured dataset of Coordinate Reference Systems and Coordinate Transformations, accessible through this online registry. information publisher urn:ogc:def:crs:EPSG::3031 6.18.3 Aeromagnetic survey across the Brunt Ice Shelf, 2017 2018-03-16 creation 2018-03-16 revision 2018-03-16 publication 2018-03-16 released None https://doi.org/10.5285/410ee2f9-2d22-4155-aaed-43b93a7c3d62 doi GB/NERC/BAS/PDC/01072 https://data.bas.ac.uk/ Please cite this item as: Jordan, T., Corr, H., & Robinson, C. (2018). Aeromagnetic survey across the Brunt Ice Shelf, 2017 (Version None) [Data set]. Polar Data Centre, Natural Environment Research Council, UK. https://doi.org/10.5285/410ee2f9-2d22-4155-aaed-43b93a7c3d62 This data set contains aeromagnetic data collected opportunistically during an airborne radar survey of the Brunt Ice Shelf as part of the NERC/BAS Life Time of Halley project. The survey was flown draped with an average height above the ice surface of 420m, and includes 4716 km of new data. The aircraft used was the BAS aerogeophysically equipped twin otter VP-FBL. Data are available include all data streams from raw to fully processed, following the ADMAP 2 naming convention, and are provided in both Geosoft database (.gdb) and ASCII file formats (.xyz). Base station data is also provided. No credit. completed Jordan, Tom British Antarctic Survey Researcher author Corr, Hugh British Antarctic Survey Researcher author Robinson, Carl British Antarctic Survey Researcher author NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact asNeeded completed EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glaciers EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Ice Sheets theme Global Change Master Directory (GCMD) Science Keywords 2026-01-27 publication 23 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) Greenbelt MD United States of America https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Antarctica Brunt Ice Shelf Coats Land Geophysics Magnetic theme Brunt Ice Shelf, Coats Land, East Antarctica Antarctica place Elevation theme GEMET - INSPIRE themes, version 1.0 2021-01-06 revision otherRestrictions no limitations to public access otherRestrictions no limitations license Open Government Licence v3.0 otherRestrictions This data is governed by the NERC Data Policy: https://www.ukri.org/who-we-are/nerc/our-policies-and-standards/nerc-data-policy/ otherRestrictions . Further by downloading this data the user acknowledges that they agree with the NERC data policy (), and the following conditions: 1. To cite both the data and literature reference in any publication as follows: DATA REFERENCE Jordan, T., Corr, H. & Robinson, C. "Aeromagnetic survey across the Brunt Ice Shelf, 2017" (2018) Polar Data Centre, Natural Environment Research Council, UK Research & Innovation, UK doi:10.5285/410ee2f9-2d22-4155-aaed-43b93a7c3d62 LITERATURE REFERENCE Jordan and Becker 2018 In prep. 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. otherRestrictions No restrictions apply. doi doi crossReference url url dependency url url crossReference textTable eng utf8 climatologyMeteorologyAtmosphere geoscientificInformation -27.39956 -14.58033 -76.16255 -74.23034 2017-01-09 2017-01-14 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. NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information distributor bytes 1 https://ramadda.data.bas.ac.uk/repository/entry/show/?entryid=410ee2f9-2d22-4155-aaed-43b93a7c3d62 WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: Raw line aeromagnetic data from the 2017 Brunt Survey were corrected for the regional geomagnetic field (IGRF) and diurnal variations recorded by the Halley VI magnetic fluxgate base station. Base station corrections were filtered with a 30 minute filter to ensure short wavelength signals, likely only seen at the base station, were not transferred to the airborne dataset. Additional corrections for offsets induced by aircraft operations and flight heading direction were also applied. Note magnetic compensation was not carried out as the opportunistic nature of the dataset did not allow for a suitable calibration flight. To further improve the levelling of the 2017 Brunt aeromagnetic survey data from ICEGRAV 2013 survey (Forsberg et al., 2017) was also considered, but is not included in this data download. Magnetic data from both surveys were continued to a common altitude of 500m. To minimize errors due to downward continuation data were filtered with a low pass filter two times the downward continuation distance. After continuation the data were statistically levelled to minimize survey to survey offsets and residual errors along individual lines. Data collection: Data was collected using the BAS aerogeophysicaly equipped twin otter VP-FBL. Magnetic data was collected using wing tip mounted Scintrex CS-3 High Sensitivity Cs magnetometers. Data was recorded at 10 Hz on a PicoEnvirotec logging system, before being decimated to 1 Hz for subsequent processing. Additional base station information from a calibrated long-term fluxgate sensor at Halley Station was used during data processing. Data quality: The standard deviation of the crossover error of the final statistically levelled dataset was 8.21 nT for 313 intersections, after removing 9 anomalously high (>30 nT) crossover values. Resolution: The line spacing for the main survey area is 5km, with regional lines spaced ~18 km apart. The provided data is sampled at 1Hz, which equates to a 60m along track sample spacing. asNeeded completed