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AIDJEX Beaufort Sea Upward Looking Sonar April 1976

Metadata Updated: November 12, 2020

This data contains Upward Looking Sonar (ULS) profiles of the underside of the Arctic pack ice along three transects whose total length is 777 nautical miles. The data were obtained by the USS Gurnard (SSN-662), a U.S. Navy submarine, on a traverse of the AIDJEX Main Experiment area in the Beaufort Sea from 07 April 1976 to 10 April 1976. The sea ice thickness derived from the ULS is given in feet.The data are in a single ASCII text file: Aidjex_04_1976_uls.txt. The data in this text file are not formatted into columns; all data are presented in one long row separated by spaces. Little is known about the format of the file, so caution should be used when working with the data. NSIDC is providing this data as part of our effort to preserve historical data. The data file begins with nine values that appear to be header information. These nine values include latitude and longitude values along with other unknown values. After the header, there are approximately 2100 measurements of what NSIDC believes is sea ice thickness in feet, however it is unclear how often these measurements were taken. After these 2100 values, another header of nine values occurs followed again by 2100 measurements. The file continues in this pattern through the remainder of the file. Users with information about the contents of the file are encouraged to contact NSIDC User Services.Two supporting documents that provide some background have been scanned and included as PDF files. These are AIDJEX_ULS_background.pdf and AIDJEX_ULS_format.pdf.These data are available via FTP.Note: These data are in a raw format with unknown fields and are being provided as is for preservation purposes. A processed version of the data are available in the Submarine Upward Looking Sonar Ice Draft Profile Data and Statistics data set.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Date August 13, 2015
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) August 28, 2013 (publication)
Frequency Of Update asNeeded

Metadata Source

Harvested from NSIDC

Additional Metadata

Resource Type Dataset
Metadata Date August 13, 2015
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) August 28, 2013 (publication)
Responsible Party (Principal Investigator); National Snow and Ice Data Center (Point of Contact)
Contact Email
Guid noaa.ncei.nsidc.G02191
Access Constraints Access Constraints : none, Use Constraints : none
Bbox East Long -137
Bbox North Lat 76
Bbox South Lat 70
Bbox West Long -155
Coupled Resource
Frequency Of Update asNeeded
Harvest Object Id 3862096e-07b4-42aa-9cbc-80de1ccc5a3d
Harvest Source Id f24c6629-4c02-44bc-863f-5f319481e810
Harvest Source Title NSIDC
Licence
Metadata Language eng; usa
Metadata Type geospatial
Progress complete
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 19760407
Temporal Extent End 19760410

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