Processed bed elevation picks from airborne radar depth sounding across the Institute and Moller Glacier catchments in 2010/11

• Main Authors: Ross, Neil, Corr, Hugh, Bingham, Robert, Ferraccioli, Fausto, Jordan, Tom, Le Brocq, Anne, Rippin, David, Siegert, Martin
• Format: Dataset
• Language: English
• Published: UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation 2020
• Subjects: "EARTH SCIENCE","CRYOSPHERE","SNOW/ICE","ICE DEPTH/THICKNESS"; "EARTH SCIENCE","CRYOSPHERE","GLACIERS/ICE SHEETS"; Antarctic; aerogeophysical; ice thickness; radar; surface elevation; West Antarctica; Antarc*; Antarctica; Ice Sheet
• Online Access: https://dx.doi.org/10.5285/7946c497-72fc-41cb-a9b2-bf9980efe156; https://data.bas.ac.uk/full-record.php?id=GB/NERC/BAS/PDC/01260

During the 2010/2011 Antarctic field season a collaborative NERC AFI (Antarctic Funding Initiative) project studying the basal boundary conditions of the Institute & Moller ice streams, West Antarctica, collected ~25,000 km of new high quality aeromagnetic data. Data were acquired using the BAS PASIN depth sounding radar mounted in the BAS aerogeophysically equipped Twin Otter "Bravo Lima". Data are provided as XYZ ASCII line data. Data were collected as part of the UK Natural Environment Research Council AFI grant NE/G013071/1. : Radar data and details of survey design and location are presented in Ross et al. (2012). Radar data were collected using the PASIN radar echo sounding system (table 1 (Corr et al., 2007)). 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. Full channel name definition is given in the description below. Note the ice thickness over regions of thinner ice was independently picked a second time with different processing parameters. This additional ice thickness data is also available. In the database split by line the sections are defined as follows L= main survey grid lines, T=main survey grid lines, P=long transits, D=turns. 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 segy_name Radar_segy file name. TraceNum Radar segy trace number. PriNum Raw radar time. surfPickLoc Location down trace of surface pick. bedPickLoc Location down trace of bed elevation pick. botPickLoc_thin Location down trace of bed elevation pick for thin ice. surfElev Surface elevation (m) bedElev_thin Ice bed elevation for thin ice bed pick (m) bedElev Ice bed elevation, derived by subtracting tice from surfElev (m) Bed_merge A merge of bedElev and bedElev_thin (m) tIce Ice thickness, derived from bedPickLoc and surfPickLoc. (m) tice_thin Ice thickness in regions of thin ice (m) * Projected coordinates (x and y) are in Lambert conic conformal with two standard parallels defined as follows: Latitude of false origin: -82 Longitude of false origin: -14 Latitude of 1st standard parallel -84 Latitude of 2nd standard parallel -80 False easting 2000000 False northing 2000000 : Radar data were collected using the PASIN radar echo sounding system (table 1 (Corr et al., 2007)). : Data collected with 7.5 km line spacing