USAP-DC

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To reduce file sizes the netcdfs have been split into blocks. For unattended data, numbers in the filename indicate the order in which the data therein was collected. For attended data, numbers in the filename indicate the range of waypoints included in the fil. Note that not \r\nAn example dataset is provided in the example_dataset directory. This contains two raw data files (dat files) and a netcdf file produced in the same way as the level 1 netcdfs described above.", "citation": "Kingslake, J., Brisbourne, A., Case, E., Hoffman, A., Melton, S., & Zeising, O. 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ApRES data from Thwaites Glacier 2023-2024 Cite as Kingslake, J., Brisbourne, A., Case, E., Hoffman, A., Melton, S., & Zeising, O. (2025) "ApRES data from Thwaites Glacier 2023-2024" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/None. Abstract Autonomous radio-echo sounder (ApRES) measurements recorded on Thwaites Glacier in the 2022-23 and 2023-24 seasons. Collected by Elizabeth Case, Columbia University, then Utrecht University, Sierra Melton, Penn State University, Alex Brisbourne, British Antarctic Survey, Ole Zeising, Alfred Wegner Institute, Andrew Hoffman, Columbia University, then Rice University. Data curated by Jonathan Kingslake, Lamont-Doherty Earth Observatory, Columbia University. The raw data files produced by the radar are contained in the level_0 directory available here as a zip file. Level 1 data is available here in netcdf files: The raw data have been extracted from the binary files produced by the radar and arranged into multi-dimensional arrays and saved as netcdfs using a python package called XApRES (https://github.com/ldeo-glaciology/xapres). The netcdfs include geolocation information and other metadata. Code for performing this processing step (level 0 to level 1) can be found here https://github.com/GHOST-thwaites/GHOST_ApRES_archiving. Across the two years of data collection, unattended and attended ApRES data were collected, as well as single shots and polarimetric collections of shots. Unattended data were collected at five sites called Lake1, Lake2, LTG, Takahe1, and Takahe2. Attended data were collected along centerline and acrossline transects. Separate netcdfs have been created for each collection type, season and site or transect. The filenames indicate the collection type, season and site or transect. For example, attended_centerline_polarimetric_2023_2024.nc contains polarimetric data collected along the glacier centerline in attended mode during the 2023-24 season. And files starting with unattended_Lake2 contain data collected at the Lake2 site in unattended mode. To reduce file sizes the netcdfs have been split into blocks. For unattended data, numbers in the filename indicate the order in which the data therein was collected. For attended data, numbers in the filename indicate the range of waypoints included in the fil. Note that not An example dataset is provided in the example_dataset directory. This contains two raw data files (dat files) and a netcdf file produced in the same way as the level 1 netcdfs described above. Creator(s): Kingslake, Jonathan; Case, Elizabeth; Zeising, Ole; Hoffman, Andrew; Brisbourne, Alex; Melton, Sierra Date Created: 2025-10-17 Repository: USAP-DC (current) License: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0] Spatial Extent(s) West: -111.2536, East: -106.933449, South: -77.60746001, North: -76.00181 Temporal Extent(s) Start: 2022-12-31 - End: 2024-01-16 Award(s) NSF 1738934 Version: 1 Related Project(s) NSF-NERC: Ground Geophysics Survey of Thwaites Glacier Keywords Antarctica Apres Cryosphere Glaciers/ice Sheet Snow/ice Thwaites Glacier