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., Jordan, T., & Robinson, C. (2021). Processed airborne radio-echo sounding data from the AGAP survey covering Antarctica''s Gamburtsev Province, East Antarctica (2007/2009) (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/A1ABF071-85FC-4118-AD37-7F186B72C847

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.

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., Jordan, T., & Robinson, C. (2021). Processed airborne radio-echo sounding data from the AGAP survey covering Antarctica''s Gamburtsev Province, East Antarctica (2007/2009) (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/A1ABF071-85FC-4118-AD37-7F186B72C847

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.

- Trace spacing (post-processed data): ~20 m

- Vertical resolution: ~8.4 m

- Radar centre frequency: 150 MHz

- Radar bandwidth: 12 MHz

- Radar Receiver vertical sampling frequency: 22 MHz

- Absolute GPS positional accuracy: <1.0 m (relative accuracy is one order of magnitude better). Banking angle was limited to 10 deg during aircraft turns to avoid phase issues between GPS receiver and transmitter.

Flights were flown in a detailed survey grid with a line spacing of ~5 km and tie lines ~33 km apart.

Crossover analysis of the bed pick data along flight lines reveals RMS differences of ~64 m in bed elevation with a mean of 74 m, which primarily results from off-nadir reflections and interpretation/digitizing uncertainty.

Please note: The surface and bed pick information (surface and bed elevation, ice thickness, etc.) from both the BAS and USAP components of the radar survey can also be found at: https://doi.org/10.5285/0f6f5a45-d8af-4511-a264-b0b35ee34af6.