Radiostratigraphy of the Weddell Sea Sector of West Antarctica

<strong>## Updated 14th June 2021 to correct a rounding error in the positions of "Hx_Raw.csv" files, suffixed with "_v2" ##</strong> <strong>## Please make sure you're using the latest "v2" version of the dataset ##</strong> ## David W. Ashmore ##<br> ## [e-mail]. ##<br> ## [e-mail] ## If you use these data, please cite the associated paper: Ashmore et al. (2020) Englacial architecture and age-depth constraints across the West Antarctic Ice Sheet. Geophysical Research Letters, 47, e2019GL086663, doi:10.1029/2019GL086663 This directory contains the location and depth of internal reflection horizons (H1, H2 and H3) derived from the "IMAFI" airborne ice-penetrating radar survey of Institute and Möller Ice Stream, West Antarctica, conducted in 2010/11. (1) Positions are given in Polar Stereographic South (EPSG: 3031) "X" and "Y" coordinates. Standard parallel -71 deg, 0 deg origin, WGS84 ellipsoid.<br> (2) "Depth" is given as metres below the ice surface reflection pick using wave velocity of 168.5 metres/microsecond and a +10 firn correction.<br> (3) "FractionalDepth" is the pick depth divded by the ice thickness.<br> (4) "Pick" is the pixel number below the ice surface of the radargram of that picked horizon.<br> (5) "DistToBed" is distance in metres from the deepest horizon (H3) to the ice bed.<br> (b) "Flight" column is the reference for individual flight during the IMAFI PASIN survey the IRHs were picked from. Two sets of information are provided.<br> &gt; "Hx_Results.csv" are depths derived from the Schumberger Petrel (R) software and the IMAFI flights.<br> &gt; "Hx_500m.csv" are depths resampled to 500 m spaced points, with fractional depth, and are the data included in Figure 2 of Ashmore et al. (2020).