Further by downloading this data the user acknowledges that they agree with the NERC data policy (), and the following conditions:

1. To cite the data in any publication as follows:

Corr, H., Ferraccioli, F., & Vaughan, D. (2020). Processed bed elevation picks from airborne radar depth sounding across the Pine Island Glacier basin (2004/05 season) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/3ADB739A-9EDA-434D-9883-03AB092CABAE

2. The user recognizes the limitations of data. Use of the data is at the users' own risk, and there is no warranty as to the quality or accuracy of any data, or the fitness of the data for your intended use. The data are not necessarily fully quality assured and cannot be expected to be free from measurement uncertainty, systematic biases, or errors of interpretation or analysis, and may include inaccuracies in error margins quoted with the data.

Methodology:

Radar data and details of survey location and design are presented in Vaughan et al. (2006). 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.

Surface elevation is derived from radar altimeter for ground clearance < 750 m, and the PASIN system for higher altitudes.

Note 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.

Channel description:

Basic Channels

Date UTC date (YYYY/MM/DD)

Time UTC time (HH:MM:SS.SS)

FlightID Sequential flight number and survey ID e.g. W12

Line_name 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

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

surfElev Surface elevation (m)

bedElev Picked ice bed elevation (m)

tIce Ice thickness, derived from bedPickLoc and surfPickLoc (m).

* Projected coordinates (x and y) are in Polar Stereographic 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