During the austral summer of 2004/05 a collaborative US/UK field campaign undertook a systematic geophysical survey of the entire Amundsen Sea embayment using comparable airborne survey systems mounted in Twin Otter aircraft. Here we present the portion of the survey covering the Pine Island Glacier basin led by British Antarctic Survey. Operating from a temporary field camp (PNE, S 77deg34' W 095deg56'); we collected ~35,000 km of airborne survey data. Our aircraft was equipped with dual-frequency carrier-phase GPS for navigation, radar altimeter for surface mapping, wing-tip magnetometers, gravity meter, and a new ice-sounding radar system (PASIN). We present here the bed elevation picks from airborne radar depth sounding collected using the BAS PASIN radar depth sounding system.
Data are provided as XYZ ASCII line data.
Antarctic, aerogeophysics, ice thickness, radar, surface elevation
|ISO Topic Categories:||
|Reference:||Vaughan, D.G., Corr, H.F.J., Ferraccioli, F., Frearson, N., O"Hare, A., Mach, D., Holt, J.W., Blankenship, D., Morse, D.L. & Young, D.A. 2006. New boundary conditions for the West Antarctic ice sheet: Subglacial topography beneath Pine Island Glacier. Geophysical Research Letters. 33. L09501, doi:10.1029/2005GL025588.|
|Lineage:||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.
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
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
|Data Set Creator||Corr, Hugh;Ferraccioli, Fausto;Vaughan, David|
|Data Set Title||Processed bed elevation picks from airborne radar depth sounding across the Pine Island Glacier basin (2004/05 season)|
|Data Set Release Date||2020|
|Data Set Publisher||Polar Data Centre,Natural Environment Research Council,UK Research & Innovation|
|Other Citation Details||shortdoi:10/dpnz|
|Horizontal Resolution Range||30 meters - < 100 meters|
|Vertical Resolution Range||N/A|
|Temporal Resolution Range||N/A|
|Detailed Location||The Pine Island Glacier basin|
|Distribution Media||Online Internet (HTTP)|
|Distribution Size||408 MB|
|Data Storage:||This dataset constains 1 ASCII XYZ file:
- BBAS_Radar_ByFlight.XYZ ~408MB
|Use Constraints:||This data is covered by a UK Open Government Licence (http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/) Further by downloading this data the user acknowledges that they agree with the NERC data policy (http://www.nerc.ac.uk/research/sites/data/policy.asp), 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.