DOI: 10.5285/ceca9a1e-7e8d-45b8-8d58-fd3625a54da7
title: Processed line aeromagnetic data over Adelaide Island (2011)

description: Aeromagnetic datasets are available for surveys over two parts of Adelaide Island- Fuchs ice piedmont at the northern end of the island and a high resolution survey grid to the south (HRAM). Data were acquired using scintrex cesium magnetometers mounted on the BAS aerogeophysical equipped Twin Otter in 2011. Data are provided as XYZ ASCII line data. This study is an output of the British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Core Programme.
description: Adelaide Island aeromagnetic data is split into two datasets: One survey over the Fuchs Ice Piedmont and a High Resolution Aeromagnetic (HRAM) survey over the Wright Peninsula and Princess Royal Range. Aeromagnetic data are presented in Jordan et al. (2014) and datasets available here include all channels from raw through to levelled, and microlevelled products. Channel naming follows SCAR/ADMAP2 data release protocols. It should be noted that in the Fuchs magnetic database, channels are sorted by x coordinates ascending. Note in the database split by line the sections are defined as follows L= main survey grid lines, T=main survey tie lines. Magnetic data channels and processing flow for HRAM low and high cap surveys: 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). For this survey, both compensation, and low pass filtering of MagR were used. TCorr- Manual corrections made to account for tip tank events, data spikes etc. RefField- Geomagnetic reference field value for which the magnetic data has been compensated. IGRF model 2010 as implemented in Geosoft (nT). MagRTC- Compensated magnetic value adjusted for Tip tanks (where used) and geomagnetic reference field values (nT). MagRTC= MagR- RefField. BCorr- Low pass filtered (60 minute) magnetic base station correction (nT). 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. Magnetic data channels and processing flow for Fuchs survey: MagR- Raw magnetic total field intensity data (nT). TCorr- Manual corrections made to account for tip tank events, data spikes etc. RefField- Geomagnetic reference field value for which the magnetic data has been compensated. IGRF model 2010 as implemented in Geosoft (nT). MagRT- Compensated magnetic value adjusted for Tip tanks (where used) and geomagnetic reference field values. (nT) MagRTC= MagR- RefField. BCorr- Low pass filtered (60 minute) magnetic base station correction. MagBRT- calculated as MagBRT= MagRT- Bcorr (nT). ACorr- Additional correction applied to compensate for low amplitude, high frequency remnant noise in the data. A high-pass filter with a cutoff wavelength of 15 fiducials was used. 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 Channels Line_no 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
description: Data collection times: Fuchs: 16/01/2011 - 23/06/2011 HRAM HighCap: 04/02/2011 - 20/02/2011 HRAM - LowCap: 05/02/2011 - 17/02/2011
description: Fully levelled aeromagnetic data product, including base station correction, statistical and microlevelling. Fuchs survey has 1 km line spacing. HRAM has 500m line spacing. No values for Scorr.