EQ-2 Thermosalinograph Format Description
           School of Ocean and Earth Science and Technology (SOEST)
                          University of Hawaii at Manoa


1.0	Overview

Thermosalinograph data was acquired on COARE EQ-2 (March 3-31 1993) on
the R/V Moana Wave using a custom made SeaBird thermosalinograph. The
thermosalinograph is mounted in the pumped intake line for cooling one
of the winches. This intake is in the ship's hull in the engine room
at ~4 m. Data were acquired at a rate of 1 Hz using a Monserv system
connected to a Sun Microsystems workstation. Bottle salinity samples
were taken periodically through out the cruise with the intension of
using them to calibrated the conductivity sensor.

2.0	Factory sensor calibration

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

TEMPERATURE: SEA-BIRD sensor number 621 was used. The post calibration
(6/19/93) was used. Fernando calculated the sensor drift between the
previous calibration to be 0.000025oC for the time of the
cruise. Since the drift was inconsequential no drift was applied.

CONDUCTIVITY: SEA-BIRD sensor number 375 was used. Coefficients from
the 01/14/93 calibration was applied. No post cruise calibration was
done.

PRESSURE of 20 dbars (assuming the pressure of the pump is 30 psi )
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 including pressure from the 
        pump is 20 dbar.

4.0	Salinity bottle comparison

	4.1	Bottle data

	The salinity samples were stored in plastic bottles for ~95
        days before being analyzed. According to studies done by Sean Kennan
        these plastic bottles allow the samples to evaporate giving saltier
        readings. An evaporation rate of 0.05e-3 psu / day was calculated from
        laboratory tests. This evaporation correction was applied to the data.

	The thermosalinograph conductivities were corrected using a
        smoothing cubic spline fit of the bottle-thermosalinograph 
        conductivity timeseries.

5.0	File format

	The 10 second thermosalinograph ACSII data file contains the 
        following three columns:

	Column 1: time (decimal Julian day since January 1, 1993)
	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