ITP24 Data Description

The ITP profiler was configured to operate with a standard sampling schedule of 2 one-way profiles between 7 and 750 m depth each day.  In the surface package, the GPS receiver was powered hourly to obtain locations, and buoy temperature and battery voltage status were recorded.  The profiler drifted with the Transpolar Drift current in the Eurasian Basins telemetering location and profiler data until June 28, 2009, when the surface unit ceased communicating to shore.  However, (based upon information obtained from the surface package when it was recovered in 2010) the profiler continued to operate and pass data to the surface package, and the GPS was able to acquire locations for another 3 months until the profiler ceased communicating on September 24, 2009.  The GPS continued to acquire locations while the surface package drifted through Fram Strait until January 30, 2010.  Apparent Iridium transmitter failure prevented the additional 180 profiles and location data to be relayed to shore, but these were retrieved when the surface float was spotted north of Iceland by a fishing vessel the following summer, recovered and returned so that the additional data was retrieved from the surface unit flash card.

The plots to the right are of the final, calibrated, edited data (as opposed to the raw data presented on the active instrument pages).

See the Data Products tab to the left for descriptions of the three levels (I, II, III) of data processing and to access all data.

ITP 24 data can also be found at the links below:

Level II hourly buoy location data in ASCII format: itp24rawlocs.dat

Level III 1-Hz processed profile data in MATLAB format: itp24cormat.tar.Z and itp24cormat.zip

Level III 1-db bin-averaged processed profile data in MATLAB format: itp24final.mat
Level III 1-db bin-averaged processed profile data in ASCII format: itp24final.tar.Z and itp24final.zip