COARE EQ-3 Thermosalinograph Format Description
            School of Ocean and Earth Science and Technology (SOEST)
                          University of Hawaii at Manoa


1.0	Overview

A Sea-Bird themosalinograph logged temperature and conductivity data
every 10 sec- onds. This thermosalinograph system had a temperature
sensor near the bow and an internal temperature sensor near the
conductivity sensor that was used to calculate salinity. The unit was
installed in the bow chest at a depth of about 3 meters. This document
gives a brief description of the data processing and data format
description.


2.0	Factory sensor calibration

The following factory calibrations were used to convert the data to
engineering units.

TEMPERATURE: SEA-BIRD sensor number 1392 was used. The pre-cruise
calibration (6/19/93) was used to convert the data to engineering
units.  The sensor drift correction was calcualted to be 0.0014C at
the beginning of the cruise (4/11/94) and 0.0015C at the end
(5/8/94). Since this variation is very small, 0.0014C was used for the
entire cruise.

CONDUCTIVITY: SEA-BIRD sensor number 1392 was used. Coefficients from
the 06/19/93 calibration was applied.

PRESSURE of 3dbar was used to calculate salinity.


3.0	Processing Summary

	3.1	Gross error check:

	Detect out of range temperatures and conductivities and use
        linear interpolation to replace them.

	3.2	Running median filter:

	Use a 5 point running median filter to detect temperature and 
        conductivity glitches.  If either one of them is a glitch,
        both the temperature and conductivities of this record are
        immediately replaced by the medians.

	3.3	Triangular running mean filter

	Use a 3-point triangular running mean filter to smooth the
        edited temperature and conductivity. 

	3.4	Salinity

	Calculate salinity assuming pressure is 20dbar (pressure of pump).


4.0	Conductivity calibration using salinity bottle samples

	4.1	Bottle data

	Water samples were taken three times a day during the entire
        cruise. Thermosalinograph data corresponding to the time the
        water samples were taken were compared to the water
        samples. The thermosalinograph conductivities for each of the 2 legs
        were individually corrected using a smoothing cubic spline fit
        of the bottle-thermosalinograph conductivity timeseries.


5.0	File format

	The thermosalinograph ACSII data file contains the following
        three columns:

	Column 1: time (decimal Julian day since January 1, 1994)
	Column 2: temperature (C)
	Column 3: salinity (psu)

	FORTRAN Format: (f9.5, f8.4, f9.5)
	C Format: "%9.5f %7.4f %8.5f"


6.0	Futher information
	
Details of the processing can be found in Shipboard Measurements from
R/V Moana Wave during TOGA COARE Enhanced Monitoring Cruises Data
Report (Shinoda et al., 1995)



	For futher information please contact:

	Roger Lukas
	Department of Oceanography
	University of Hawaii
        1000 Pope Road MSB 312
	Honolulu, HI 96822
	e-mail: rlukas@iniki.soest.hawaii.edu