Abstract:
This data set contains aeromagnetic data collected during the WISE/ISODYN project. This collaborative UK/Italian project collected ~ 61000 line km of new aerogeophysical data during the 2005/2006 austral summer, over the previously poorly surveyed Wilkes subglacial basin, Dome C, George V Land and Northern Victoria Land.
We present here the processed line aeromagnetic data collected using scintrex cesium magnetometers mounted on the BAS aerogeophysical equipped Twin Otter.
Data are provided as XYZ ASCII line data.
Keywords:
Aerogeophysics, Aeromagnetics, Antarctica
Ferraccioli, F., Armadillo, E., Jordan, T., & Bozzo, E. (2020). Processed line aeromagnetic data over Wilkes Subglacial Basin (2005/06 season) (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/45f8f9f0-0959-4044-b8fd-218f9d5c68c2
| Use Constraints: | 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: Ferraccioli, F., Armadillo, E., Jordan, T., & Bozzo, E. (2020). Processed line aeromagnetic data over Wilkes Subglacial Basin (2005/06 season) (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/45F8F9F0-0959-4044-B8FD-218F9D5C68C2 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. |
|---|
| Creation Date: | 2020-07-01 |
|---|---|
| Dataset Progress: | Planned |
| Dataset Language: | English |
| ISO Topic Categories: |
|
| Parameters: |
|
| Personnel: | |
| Name | PDC BAS |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Dr Fausto Ferraccioli |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | E. Armadillo |
| Role(s) | Investigator |
| Organisation | DISTAV, University di Genova, Genoa, Italy |
| Name | Dr Tom A Jordan |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | E. Bozzo |
| Role(s) | Investigator |
| Organisation | DISTAV, Universita di Genova, Genoa, Italy |
| Parent Dataset: | N/A |
| Reference: | Main reference: Ferraccioli, F., Armadillo, A., Jordan, T.A., Bozzo, E. & Corr, H., 2009. Aeromagnetic exploration over the East Antarctic Ice Sheet: a new view of the Wilkes Subglacial Basin, Tectonophysics, 478, 62-77, doi:10.1016/j.tecto.2009.1003.1013. Processing references: Ferraccioli, F., Gambetta, M. & Bozzo, E., 1998. Microlevelling procedures applied to regional aeromagnetic data: an example from the Transantarctic Mountains (Antarctica), Geophysical Prospecting, 46, 177-196, https://doi.org/10.1046/j.1365-2478.1998.00080.x Ferraccioli, F., Jordan, T.A., Armadillo, A., Bozzo, E., Corr, H., Caneva, G., Robinson, C., Frearson, N. & Tabacco, I.E., 2007. Collaborative aerogeophysical campaign targets the Wilkes Subglacial Basin, the Transantarctic Mountains and the Dome C region. in The Italian-British Antarctic Geophysical and Geological Survey in Northern Victoria Land 2005-06-Towards the International Polar Year 2007-08., pp. 1-36, eds. Bozzo, E. & Ferraccioli, F. Terra Antartica Reports. Pilkington, M. & Thurston, B.J., 2001. Draping corrections for aeromagnetic data: line versus grid-based approaches, Exploration Geophysics, 32, 95-101.https://doi.org/10.1071/EG01095 Fremand, A. C., Bodart, J. A., Jordan, T. A., Ferraccioli, F., Robinson, C., Corr, H. F. J., Peat, H. J., Bingham, R. G., and Vaughan, D. G.: British Antarctic Survey's aerogeophysical data: releasing 25 years of airborne gravity, magnetic, and radar datasets over Antarctica, Earth Syst. Sci. Data, 14, 3379-3410, https://doi.org/10.5194/essd-14-3379-2022, 2022. |
|
|---|---|---|
| Quality: | No value given for SCorr. This channel is provided for compatibility with ADMAP2 convention. | |
| Lineage: | WISE-ISODYN aeromagnetic data presented in (Ferraccioli et al., 2009), further details on basic data acquisition are described in (Ferraccioli et al., 2007). 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. Adjustments to compensate for aircraft roll, pitch and yaw were applied (see Ferraccioli et al, 2007 for details). For this survey, both compensation, and low pass filtering of MagR were used. 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. BCorr- Low pass filtered (60 minute) magnetic base station correction. MagBRTC- calculated as MagBRTC= MagRTC- Bcorr. ACorr- Additional correction applied to compensate for heading errors. MagF- Final mag value before levelling. MagL- Statistically levelled mag data. MagML- Microlevelled magnetic data following technique of (Ferraccioli et al., 1998). Note tie lines are not included in the microlevelled data channel. MagML_Drape Microlevelled data draped to a uniform level of 2800m above the bed topography, using the method of (Pilkington and Thurston, 2001). Basic channel descriptpion: 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: -74.018118 Longitude of false origin: 179 Latitude of 1st standard parallel -72.66666666667 Latitude of 2nd standard parallel -75.33333333333 False easting 1444000 False northing 1123000 |
|
| Temporal Coverage: | |
|---|---|
| Start Date | 2005-12-04 |
| End Date | 2006-01-25 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -76.09474 |
| Northernmost | -68.97948 |
| Longitude | |
| Westernmost | 138.8504 |
| Easternmost | 171.58707 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Data Resolution: | |
| Latitude Resolution | N/A |
| Longitude Resolution | N/A |
| Horizontal Resolution Range | 30 meters - < 100 meters |
| Vertical Resolution | N/A |
| Vertical Resolution Range | N/A |
| Temporal Resolution | N/A |
| Temporal Resolution Range | N/A |
| Location: | |
| Location | Antarctica |
| Detailed Location | Wilkes Subglacial Basin |
| Sensor(s): |
|
|---|---|
| Source(s): |
|
| Distribution: | |
|---|---|
| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 146 MB |
| Distribution Format | ASCII |
| Fees | N/A |
| Data Storage: | This dataset constains 1 ASCII XYZ file: -WISE_ISODYN_Mag.XYZ ~146MB |