91df43df-e3fd-4637-9091-e75f623e2b07 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 2020-02-27 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 Antarctica's Gamburtsev Province (AGAP) Project - Aeromagnetic data (2007-2009) 2020-02-27 creation 2020-02-27 revision 2020-02-27 publication 2020-02-27 released 1.0 https://doi.org/10.5285/91df43df-e3fd-4637-9091-e75f623e2b07 doi GB/NERC/BAS/PDC/01308 https://data.bas.ac.uk/ Please cite this item as: Ferraccioli, F., Damaske, D., Finn, C., Bell, R., Jordan, T., Robinson, C., & Frearson, N. (2020). Antarctica's Gamburtsev Province (AGAP) Project - Aeromagnetic data (2007-2009) (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/91df43df-e3fd-4637-9091-e75f623e2b07 Aeromagnetic data collected as part of the seven nation Antarctica's Gamburtsev Province (AGAP) expedition during the International Polar Year 2007-2009, and used to acquire a detailed image of the ice sheet bed deep in the interior of East Antarctica. Airborne geophysical methods were used to understand the fundamental structure shrouded beneath Dome A. Two twin Otter aircraft - one BAS, one United States Antarctic Program (USAP) - equipped with ice-sounding radars, laser ranging systems, gravity meters and magnetomemeters, operated from camps located on either side of Dome A. No credit. completed Ferraccioli, Fausto British Antarctic Survey Researcher author Damaske, Detlef Bundesanstalt fur Geowissenschaften und Rohstoffe Researcher author Finn, Carol US Geological Survey Researcher author Bell, Robin Lamont-Doherty Earth Observatory, Columbia University Researcher author Jordan, Tom British Antarctic Survey Researcher author Robinson, Carl British Antarctic Survey Researcher author Frearson, Nicholas 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 > Land Surface > Topography > Topographical Relief EARTH SCIENCE > Solid Earth > Geomagnetism > Magnetic Anomalies 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 Gamburtsev Province aerogeophysics magnetics theme Gamburtsev Province Antarctica place Land cover Geology 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 the data in any publication as follows: Ferraccioli, F., Damaske, D., Finn, C., Bell, R., Jordan, T., Robinson, C., & Frearson, N. (2020). Antarctica's Gamburtsev Province (AGAP) Project - Aeromagnetic data (2007-2009) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/91DF43DF-E3FD-4637-9091-E75F623E2B07 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. url url largerWorkCitation url url crossReference url url crossReference url url crossReference textTable eng utf8 geoscientificInformation imageryBaseMapsEarthCover -179.726 179.29 -89.996 -74.116 2008-11-01 2009-04-30 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 text/plain bytes 525336576 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=91df43df-e3fd-4637-9091-e75f623e2b07 WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: The aeromagnetic system used was manufactured by Scintrex/PicoEnvirotec and has also extensively been used in Antarctica before. Aeromagnetic data was collected using two optically pumped Scintrex Cs-3 sensors which were fitted in pods and mounted in wing-tip configuration on the Twin Otter. A fluxgate magnetometer provided the data to compensate for the magnetic effect of the aircraft and a magnetic base station was deployed to monitor external magnetic field variations. In total, 120,000 line km of data were acquired from a nested survey grid with line spacing of 5km and tie lines ~ 33 km apart. AGAP aeromagnetic data presented in Ferraccioli et al. (2011). The dataset available here includes all channels from raw through to levelled, and draped products. Channel naming follows SCAR/ADMAP2 data release protocols. Magnetic data channels and processing flow: MagR- Raw magnetic total field intensity data (nT). MagC- Compensated, or low pass filtered magnetic data (nT). Adjustments to compensate for aircraft roll, pitch and yaw were applied (see Ferraccioli et al, 2007 for details). RefField- Geomagnetic reference field value for which the magnetic data has been compensated. IGRF model 2005 as implemented in Geosoft (nT). MagRTC- Compensated magnetic value adjusted for Tip tanks (where used) and geomagnetic reference field values. MagRTC= MagR- RefField (nT). BCorr- Low pass filtered (60 minute) magnetic base station correction. Data from three base stations were used for different portions of the survey (BCorr_AGAP_N, BCorr_AGAP_S, BCorr_AGAP_SP), along with a merged value between North and South base stations (BCorr_AGAP_NS). MagBRTC- calculated as MagBRTC= MagRTC- Bcorr (nT). ACorr- Additional correction applied to compensate for heading errors. MagF- Final mag value before levelling (nT). MagL- Statistically levelled mag data (nT). MagML- Microlevelled magnetic data following technique of (Ferraccioli et al., 1998). (nT) Note tie lines are not included in the microlevelled data channel. Basic channel description: Line name Line Number Flight ID Sequential flight number x x projected meters* y y projected meters* Lon Longitude WGS 1984, Lat Latitude WGS 1984, Height_WGS1984 Aircraft altitude (meters) in WGS 1984, Date Date of flight in time format e.g. 2006/01/08 Time Time (UTC) of flight e.g. 23:52:42.0 *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 Data quality: The accuracy of the processed data is approximately 1 nT. asNeeded completed