Radiostratigraphy of the Weddell Sea Sector of West Antarctica

## Updated 14th June 2021 to correct a rounding error in the positions of "Hx_Raw.csv" files, suffixed with "_v2" ##

## Please make sure you're using the latest "v2" version of the dataset ##

## David W. Ashmore ##
## david.w.ashmore@outlook.com. ##
## d.ashmore@liverpool.ac.uk ##

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.
(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.
(3) "FractionalDepth" is the pick depth divded by the ice thickness.
(4) "Pick" is the pixel number below the ice surface of the radargram of that picked horizon.
(5) "DistToBed" is distance in metres from the deepest horizon (H3) to the ice bed.
(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.
> "Hx_Results.csv" are depths derived from the Schumberger Petrel (R) software and the IMAFI flights.
> "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).