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., 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.

Methodology:

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

Data quality:

No value given for SCorr. This channel is provided for compatibility with ADMAP2 convention.