ITP52 Data Description
The ITP profiler was configured to operate on a pattern profiling schedule with different summer and winter schedules. In the summer (between March 1 and October 31), the instrument conducted a 1.5 day repeating pattern of an up profile from 750 to 7 m, followed by 4 one-way (down, up, down, up) profiles between 7 and 200 m, followed by a down profile from 7 to 750 m, all spaced 6 hours apart. In the winter (between November 1 and February 28 or 29), the instrument conducted a 3 day repeating pattern of an up profile from 750 to 7 m, followed 6 hours later by a down profile from 7 to 200 m, followed 24 hours later by an up profile from 200 to 7 m, followed 6 hours later by a down profile from 7 to 750 m, followed by a 36 hour gap before the pattern repeated. The complicate scheme was designed to conserve battery power to extend the lifetime of the instrument, while maximizing the acquisition of the bio-optical data during the summer months. In the surface package, the GPS receiver was powered hourly to obtain locations hourly, and buoy temperature and battery voltage status were recorded.
After circling about a bit, the buoy generally meandered northward along 140°W during the first month to attain its northernmost location over 150 km north of the deployment site. Thereafter it drifted generally east and south with the Beaufort Gyre circulation. The profiler stopped communicating with the surface package after 3.5 months on November 23, 2011. Two months later, the surface package ceased transmitting on January 19, 2012.
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 52 data can also be found at the links below:
Level II hourly buoy location data in ASCII format: itp52rawlocs.dat
Level III 1-Hz processed profile data in MATLAB format: itp52cormat.tar.Z and itp52cormat.zip
Level III 1-db bin-averaged processed profile data in MATLAB format: itp52final.mat
Level III 1-db bin-averaged processed profile data in ASCII format: itp52final.tar.Z and itp52final.zip
