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:

Jordan, T., Corr, H., & Robinson, C. (2021). Processed line aeromagnetic data from the FISS 2016 surveys covering the Filchner and Halley Ice Shelves, and the English Coast (western Palmer Land), West Antarctica (2016/2017) (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/83C4F40E-ABD4-4F76-A7DB-D7307BD56B55

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:

The dataset available here includes all channels from raw through to levelled and microlevelled products. Channel naming and processing follows SCAR/ADMAP2 data release protocols.

channel description:

Line:Flight Flight line and flight number. Format XYYY:ZZ X=L (line), T(Tie), P or S (legacy survey)

Lat Lon Height_WGS84 Direct GPS navigation information, accurate to ~5 m.

Date Time UTC time values

MagR Raw magnetic data (nT)

Tcorr Tip correction for aircraft systems (nT)

RefField IGRF reference field (nT)

MagRTC Mag corrected for Tips and reference field NOTE No compensation correction (nT)

BCorr Base station correction with 30 min filter and after mean removal (nT)

MagBRT Mag after base station correction (nT) - B=base corrected, T=tip corrected, R=regional corrected

Acorr Heading correction - only applicable to some lines (nT)

MagF Final mag field prior to levelling (nT)

MagL Statistically levelled anomalies (nT)

MagML Micro-levelled anomalies (nT)

x y Polar Stereographic coordinates (m)

FISS - 16/17 season

Slessor: Opportunistic aeromagnetic data collected during an airborne radar survey. Flights with 2.5 km line spacing. Standard ADMAP2 processing flow, including IGRF and Tip tank corrections. However, due to the opportunistic nature of the survey no compensation calibration for aircraft motion was performed. Base station correction based on local base station filtered with 30 minute filter, after removal of mean base station value across the survey period. For levelling additional data from ADMAP2 compilation and ICEGRAV 2013 surveys was included to provide additional ties. These are coded as P or S lines, rather than L or T. Microleveling utilised gridded line data filtered with 10 km Butterworth How Pass, and cosine directional filter (with Azimuth 140, and degree 1). Filtered correction was sampled onto lines and low-pass filtered with 12 km Butterworth filter.

Support Force processing notes:

Opportunistic aeromagnetic data collected during an airborne radar survey. Flights with 2.5 km line spacing. Standard ADMAP2 processing flow, with IGRF correction. Tip corrections were not performed as these errors were restricted to areas outside the main survey grid, also due to the opportunistic nature of the survey no compensation calibration for aircraft motion was performed. Base station correction based on local base station filtered with 30 minute filter, after removal of mean base station value across the survey period. Microleveling utilised gridded line data filtered with 10 km Butterworth How Pass, and cosine directional filter (with Azimuth 52.5, and degree 0.75). Filtered correction was sampled onto lines and low-pass filtered with 12 km Butterworth filter.

Baily

Opportunistic aeromagnetic data collected during an airborne radar survey. Flights with 2.5 km line spacing. Standard ADMAP2 processing flow, including IGRF and Tip tank corrections. However, due to the opportunistic nature of the survey no compensation calibration for aircraft motion was performed. Base station correction based on local base station filtered with 30 minute filter, after removal of mean base station value across the survey period. Microleveling utilised gridded line data filtered with 10 km Butterworth How Pass, and cosine directional filter (with Azimuth 111, and degree 1). Filtered correction was sampled onto lines and low-pass filtered with 12 km Butterworth filter.

Recovery

Opportunistic aeromagnetic data collected during an airborne radar survey. Flights with 2.5 km to 5 km line spacing, and an array of oblique lines. Standard ADMAP2 processing flow, including IGRF and Tip tank corrections. However, due to the opportunistic nature of the survey no compensation calibration for aircraft motion was performed. Base station correction based on local base station filtered with 30 minute filter, after removal of mean ...(4)