ITP25 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.  After 289 days of reliable operation and data telemetry while gradually drifting from the Makarov Basin across toward the Canadian Archipelago, ITP 25 suddenly ceased transmitting data. Often loss of communications with the profiler, followed by loss of GPS locations precede disappearance of an ITP presumably encased in a ridge.  These symptoms were not present in this case, so the reason for the abrupt failure is not known.

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 25 data can also be found at the links below:

Level II hourly buoy location data in ASCII format: itp25rawlocs.dat

Level III 1-Hz processed profile data in MATLAB format: itp25cormat.tar.Z and itp25cormat.zip

Level III 1-db bin-averaged processed profile data in MATLAB format: itp25final.mat
Level III 1-db bin-averaged processed profile data in ASCII format: itp25final.tar.Z and itp25final.zip