USCGC Healy HLY-02-03 1-Minute Position and Weather Data

This dataset is a composite of several ship underway datasets produced by
the U.S. Coast Guard aboard the USCGC Healy during the Summer SBI Process
Cruise of 2002 (hly-02-03). Routine data logging procedures for underway data
aboard the Healy archive data of different types in physically seperate files.
This has the unfortunate effect of seperating interesting data from the
location of the ship when the measurement was taken. To remedy this situation, a perl script was written by the author to produce
a composite file that contained both ship position and weather information
collected during the above mentioned cruise. This file is a composite of the
PCode-Aft_GGA position datafiles (1 second resolution), the RMYoung-AIR
weather datafiles (3 second resolution), and the TrueWindSpeed datafiles (1
second resolution). The composite is a collection of grab samples (not averages) at approximately
1 minute intervals during the cruise. The composites were constructed by
starting with the time at which the weather observation occurred. The
TrueWindSpeed files were then searched to find corresponding wind information. Lastly, the position files were searched until the position at the observation
time was found. If the times matched or were within 10 seconds of one another,
the weather, winds and position data were written to the composite file. The
position information was converted from Degrees Minutes Seconds format
(DDDMM.SSS) to a Decimal Degrees format (DDD.DDDDD)