ctd

 PI:              John Morrison
 dataset:         CTD profile data at one decibar intervals
 project/cruise:  Arabian Sea/TTN039 - Intercalibration Cruise
 ship:            Thomas Thompson

 PI Notes and Methodology


 Parameter  Description                                  Units

 event      a unique number assigned to each sampling
              operation consisting of month MM, day DD
              and decimal hour HH.H
 sta        station number
 cast       CTD cast number
 date       date (YYYYMMDD) decoded as follows
              YYYY = year, MM = month, DD = day
              Date converted to UTC(GMT)
 time       time of day in UTC(GMT)                      decimal hours
 lat_begin  latitude of station, negative = south        decimal degrees
 lon_begin  longitude of station, negative = west        decimal degrees
 depth      sample depth reported as meters              meters
 press      sample depth reported as pressure            decibars
 temp       temperature, IPTS-68                         degrees C
 cond       conductivity                                 milliSiemens/centimeter
 sal        salinity, PSS-78                             dimensionless
 potemp     potential temperature, IPTS-68               degrees C
 sigma_t    sigma t                                      kilogram/meter^3
 sigma_0    sigma theta (potental density)               kilogram/meter^3
 
 nd indicates missing or bad data