Instrument: Ice Profiling Sonar

Dataset: 
moorings_CTD 2001
Instrument: 
Ice Profiling Sonar
Instrument Short Name: Ice Profiler
Community Standard Description
(http://vocab.nerc.ac.uk/collection/L22/current/TOOL0292/)
Instrument Description:

The ASL Environmental Sciences (e.g. IPS4 or IPS5) ice profiler is an upward looking sonar device deployed on a mooring for measuring ice keel drafts. The distance between the instrument and the bottom of the ice is measured by sonar at an operating frequency of 420 kHz with a beam width of 1.8 degrees and sampling rate of up to 2Hz. Water depth is measured by a pressure sensor and ice draft is calculated by the difference.

PI supplied instrument name: ice profiler
Dataset-specific description

ASL Environmental Sciences ice-profiling sonars (IPSs)deployed at the top of A2 and B2 measured the acoustic range
to the surface (the sea surface or ice bottom when present) every 2 secs and water temperature, pressure, and x- and y-tilt every 120 secs.