Airborne magnetic data covering the Evans, and Rutford Ice Streams, and ice rises in the Ronne Ice Shelf (2006/07)

The dataset available here includes all channels from raw through to levelled, and microlevelled products. Channel naming follows SCAR/ADMAP2 data release protocols, although the order of processing steps differs from that outlined by ADMAP2 documentation. Magnetic data channels and processing flow: MagR- Raw magnetic total field intensity data (nT). MagC- Raw magnetic data corrected/cleaned for obvious tip tank events or anomalous spikes. TCorr- Tiptank corrections (nT). These include DC shifts and gradients due to aircraft noice, etc. Dummy values if not applicable. RefField- Geomagnetic reference field value for which the magnetic data has been compensated. IGRF model 2000 as implemented in Geosoft (nT). MagRTC- Compensated magnetic value adjusted for tip tanks and the geomagnetic reference field. BCorr- Low pass filtered (30 minute) magnetic base station correction. MagBRTC- calculated as MagBRTC= MagBTC- RefField. SCorr- Any DC shift applied. ACorr- MagRT filtered using a low pass filter with a cut-off length of 15 fiducials to account for noise introduced by aircraft roll, pitch and yaw. 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. 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 Polar stereographic (GRS 1980) defined as follows: Latitude of natural origin: -71 Longitude of natural origin: 0 Scale factor at natural origin -75.33333333333 False easting 0 False northing 2082760.109