Processed bed elevation picks from airborne radar depth sounding across Ellsworth Land (2001)

Radar data were collected using the PASIN radar echo sounding system (table 1 (Corr et al., 2007)). The TORUS survey involved the collection of a total of approximately 9,500 km of line data along 15 flights, with 10 km spacing. The airborne ice sounding radar system used a 4 μs linear frequency modulated pulse in addition to a standard short 2 μs pulse. Data provided here includes picks of surface and ice sheet bed elevation. Note a single flight may contain data from two or more SEGY files, identified in the SEGYname channel. Surface elevation is derived from radar altimeter for ground clearance < 750 m, and the PASIN system for higher altitudes. Channel description: Basic Channels Name Description Date UTC date (YYYY/MM/DD) Time UTC time (HH:MM:SS.SS) FlightID Sequential flight number and survey ID e.g. W12 Line_no Line Number e.g. LW200.1 Lon Longitude WGS 1984 Lat Latitude WGS 1984 x x projected meters* y y projected meters* Height_WGS1984 Aircraft altitude (meters) in WGS 1984 Radar surfElev Surface elevation (m) bedElev Ice bed elevation, derived by subtracting tice from surfElev (m) tIce Ice thickness, derived from bedPickLoc and surfPickLoc (m). * Projected coordinates (x and y) are in Lambert conic conformal with two standard parallels defined as follows: Latitude of natural origin: -71 Longitude of natural origin: 0 Scale factor at natural origin 0.994 False easting 0 False northing 2082760.109