preliminary data report
may 18, 1995
A.	Cruise Narrative
 
A.1 	Highlights

A.1.a	WOCE designation	PR17
A.1.b	EXPOCODE		49SU9101/2
A.1.c	Chief Scientist		Nobuo SATO
				Kobe Marine Observatory(KMO)

A.1.d	Ship: 		        R/V Shumpu Maru
A.1.e	Port of Call		Hososima to Kochi
A.1.f	Cruise Dates		February 24 to February 28,1991


A.2	Cruise Summary

A.2.a	Geographic boundaries

A.2.b	Total number of stations occupied

A.2.c	Floats and drifters deployed

A.2.d	Moorings deployed or recovered


A.3 	List of Principal Investigators

           Table 1: Principal Investigators for All Measurements
	-------------------------------------------------------------
                    Name               Responsibility     Affiliation
                 Nobuo SATO           Oxygen, Nutrients       KMO
                 Ryohei OKADA         CTD, S                  KMO
	-------------------------------------------------------------


A.4	Scientific Programme and Methods

The ship departed Hososima on February 24,1991, and made 6 CTD/rosette
stations of a section PR17. 4 XBT stations were made between CTD/rosette
stations. To first CTD/rosette station the ship reached at 1905 UTC on 
February 24, from last station departed at 2030 UTC on February 25.

The CTD is EG&G NBIS Mark III B(6500 db type, no oxygen sensor). Water
samples were collected from 1.7 liter Niskin bottles mounted on the General
Oceanics Rosette multisampler. However, surface water samples were 
collected by a bucket.

A.5	Major Problems and Goals Not Achieved
A.6	Other incidents of Note
A.7	List of Cruise Participants
    
           Table 2: Cruise Participants for leg 3
	---------------------------------------------------------------    
                Name               Responsibility     Affiliation
	---------------------------------------------------------------
                 Nobuo SATO           Chief Scientist         KMO
                                      Oxygen, Nutrients
                 Ryohei OKADA         CTD Hardware            KMO
                 Toshihiko YANO       Oxygen, Nutrients       KMO
                 Syunta NAITOO        CTD Software            KMO
                 Akiyoshi AWANO       Oxygen, Nutrients       KMO
                 Keiichi SATO         Watch Stander           KMO
                 Masayoshi ISHII      Watch Stander           KMO
                 Satoru YAMAGUCHI     Watch Stander           KMO
                 Hiroki SUZUKI        Oxygen, Nutrients       KMO

	--------------------------------------------------------------


B.	Underway Measurements

B.1	Navigation and bathymetry
B.2	Acoustic Doppler Current Profiler (ADCP)
B.3	Thermosalinograph and underway dissolved oxygen, fluorometer, etc
B.4	XBT and XCTD
B.5	Meteorological observations
B.6	Atmospheric chemistry

C.	Hydrographic Measurements

CTD

The CTD is EG&G NBIS Mark III B(6500 db type, no oxygen sensor).
A HP 9000 Series 300 model 330(Hewlett Packard) with a 4 MByte of 
memory was used as the primary data collection device. 

The temperature and pressure sensor were calibrated at the calibration
facility of HAKUTO CO., LTD before the cruise. The results are shown in
Table 3.  However, no correction with these results has been made because
the correction method are not established.

    Table 3: The temperature and pressure sensor calibration constants
           Temperature
           ------------------------------------------------- 
	        Time                 Bias         Slope
	   -------------------------------------------------
           January 28(pre-cruise)  -0.0101126    0.9998815
           Pressure (increasing)
                 Time                 Bias         Slope
           February 4(pre-cruise)  -6.0676       1.000512
           Pressure (decreasing)
                 Time                 Bias         Slope
           February 4(pre-cruise)  -10.0073      1.001266
	   -------------------------------------------------

The conductivity sensor were calibrated at sea using data from the 
analyses of salinity collected at 3 stations of before leg. The 
salinometer is AUTOLAB model 1601 for the analyses of salinity of the
water samples. The calibration constant is determined assuming that the
bias 0. The results are shown in Table 4.

           Table 4: The conductivity sensor calibration constants
	   ------------------------------------------------------
                 Bias                Slope
                   0                0.99999
	   ------------------------------------------------------

Oxygen Measurements

The determination of dissolved oxygen was done by the modified version of
the Winkler method described in "Kaiyo Kansoku Shishin (Manual of 
Oceanographic Observation)" published by the Oceanographical Society of
Japan(1970). The reagent blank was not subtracted. No estimation of
accuracy and precision has been done.

Nutrients Analyses

The nutrients analyses were done by the Technicon Auto Analyzer II
described in "Kaiyo Kansoku Shishin (Manual of Oceanographic Observation)"
published by the Oceanographical Society of Japan(1970). No estimation of
accuracy and precision has been done.

D.	Acknowledgments
E.	References

Unesco, 1983. International Oceanographic tables. Unesco Technical Papers in 
Marine Science, No. 44.

Unesco, 1991. Processing of Oceanographic Station Data, 1991. By JPOTS
editorial panel.

F.	WHPO Summary


Several data files are associated with this report.  They are the su9102.sum, 
su9102.hyd, su9102.csl and *.wct files.  The su9102.sum file contains a 
summary of the location, time, type of parameters sampled, and other pertient
information regarding each hydrographic station.  The su9102.hyd file contains 
the bottle data. The *.wct files are the ctd data for each station.  The *.wct 
files are zipped into one file called su9102wct.zip. The su9102.csl file is a 
listing of ctd and calculated values at standard levels.

The following is a description of how the standard levels and
calculated values were derived for the su9102.csl file:

Salinity, Temperature and Pressure:  These three values were smoothed from
the individual CTD files over the N uniformly increasing pressure levels.
using the following binomial filter-

	t(j) = 0.25ti(j-1) + 0.5ti(j) + 0.25ti(j+1) j=2....N-1

When a pressure level is represented in the *.csl file that is not
contained within the ctd values, the value was linearly interpolated
to the desired level after applying the binomial filtering.   

Sigma-theta(SIG-TH:KG/M3), Sigma-2 (SIG-2: KG/M3), and Sigma-4(SIG-4:
KG/M3): These values are calculated using the practical salinity scale
(PSS-78) and the international equation of state for seawater (EOS-80)
as described in the Unesco publication 44 at reference pressures of the
surface for SIG-TH; 2000 dbars for Sigma-2; and 4000 dbars for Sigma-4.

Gradient Potential Temperature (GRD-PT: C/DB 10-3) is calculated as the
least squares slope between two levels, where the standard level is the
center of the interval.  The interval being the smallest of the two
differences between the standard level and the two closest values.
The slope is first determined using CTD temperature and then the
adiabatic lapse rate is subtracted to obtain the gradient potential
temperature.  Equations and Fortran routines are described in Unesco
publication 44.

Gradient Salinity (GRD-S: 1/DB 10-3) is calculated as the least squares
slope between two levels, where the standard level is the center of the
standard level and the two closes values.  Equations and Fortran
routines are described in Unesco publication 44.

Potential Vorticity (POT-V: 1/ms 10-11) is calculated as the vertical
component ignoring contributions due to relative vorticity, i.e.
pv=fN2/g, where f is the coriolius parameter, N is the bouyancy
frequency (data expressed as radius/sec), and g is the local
acceleration of gravity. 

Bouyancy Frequency (B-V: cph) is calculated using the adiabatic
leveling method, Fofonoff (1985) and Millard, Owens and Fofonoff
(1990).  Equations and Fortran routines are described in Unesco
publication 44.

Potential Energy (PE: J/M2: 10-5) and Dynamic Height (DYN-HT: M) are
calculated by integrating from 0 to the level of interest.  Equations and 
Fortran routines are described in Unesco publication, Processing of 
Oceanographic station data.

Neutral Density (GAMMA-N: KG/M3) is calculated with the program GAMMA-N
(Jackett and McDougall) version 1.3 Nov. 94.  


G.	Data Quality Evaulation