Instrument specification for ASL ULS/ADCP studies have been added to Catalog for download. Upward Looking Sonar (ULS) and Acoustic Dopler Current Profiler(ADCP) are part of the Shell data delivery. These data and the associated reports and documentation are processed data for ice keel depth, ice velocity and ocean current profile measurements and include vessel observations. Deployment of ULS and ADCP started in 2005 for the Beaufort Sea and in 2008 for the Chukchi Sea. This work continued through 2014.

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