File Format of XCTD data

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XCTD data files consist of header part (first 14 records) and data part, The following elements are separated by comma in each record.

(a) Header part
Record Information
Record No. Element

Rec-1 Ship name [listed in Table], cruise number and format code. Cruise number is identified with the year and the month. Format code is 'X1.1'.

Rec-2 Station number.Station number is given by the ship code [listed in Table] suffixed with four-digits consecutive numbers.

Rec-3 The number of data records.

Rec-4 Date (year/month/day) and time at the beginning of the expendable CTD observation in the Japan Standard Time (JST), which is nine hours ahead of the Coordinated Universal Time (UTC).

Rec-5 Latitude and longitude at the beginning of the expendable CTD observation with degrees, `-', minutes, `.', hundredth part of minutes.

Rec-6 Water depth at the beginning of the expendable CTD observation and sounding flag [listed in Table].

Rec-7 Corresponding station number of the subsurface current data and sub-station number.

Rec-8 Sea surface temperature and salinity.

Rec-9 Probe type and instrument serial number.

Rec-10 Coefficients of the depth-time equation.

Rec-11 Correction coefficient of water temperature sensor.

Rec-12 Correction coefficient of electric conductivity sensor.

Rec-13, Rec-14 Headers for data columns.

**Record Information**
Record No.	Element
Rec-1	Ship name [listed in Table], cruise number and format code. Cruise number is identified with the year and the month. Format code is 'X1.1'.
Rec-2	Station number.Station number is given by the ship code [listed in Table] suffixed with four-digits consecutive numbers.
Rec-3	The number of data records.
Rec-4	Date (year/month/day) and time at the beginning of the expendable CTD observation in the Japan Standard Time (JST), which is nine hours ahead of the Coordinated Universal Time (UTC).
Rec-5	Latitude and longitude at the beginning of the expendable CTD observation with degrees, `-', minutes, `.', hundredth part of minutes.
Rec-6	Water depth at the beginning of the expendable CTD observation and sounding flag [listed in Table].
Rec-7	Corresponding station number of the subsurface current data and sub-station number.
Rec-8	Sea surface temperature and salinity.
Rec-9	Probe type and instrument serial number.
Rec-10	Coefficients of the depth-time equation.
Rec-11	Correction coefficient of water temperature sensor.
Rec-12	Correction coefficient of electric conductivity sensor.
Rec-13, Rec-14	Headers for data columns.

(b) Data part

Data are described at every 1 meter. The meaning of attached flags is shown in table.

Record information
Record No. Elements

below Rec-15 Depth, Temperature, flag of temperature, Salinity and flags of salinity [listed in table].

**Record information**
Record No.	Elements
below Rec-15	Depth, Temperature, flag of temperature, Salinity and flags of salinity [listed in table].

Ship codes.
Ship Name CALL SIGN Ship Code BT Code AERO CODE

Kofu Maru JDWX KH th 1 2 47 002

Ryofu Maru JGQH RF tf 1 2 47 646

Keifu Maru JPBN KS ts 1 2 47 000

Chofu Maru JCCX NC tc 1 2 47 001

Seifu Maru JIVB SM tm 1 2 47 003

**Ship codes**.
Ship Name	CALL SIGN	Ship Code	BT Code	AERO CODE
Kofu Maru	JDWX	KH	th	1 2 47 002
Ryofu Maru	JGQH	RF	tf	1 2 47 646
Keifu Maru	JPBN	KS	ts	1 2 47 000
Chofu Maru	JCCX	NC	tc	1 2 47 001
Seifu Maru	JIVB	SM	tm	1 2 47 003

Sounding flag of water depth in CTD, XCTD and BT data.
Flag No. Definition

1 Sounding by echo-sounder (not corrected)

2 Sounding by echo-sounder (corrected)

5 Water depth measured by CTD and altimeter

6 Water depth measured by BT or XCTD submersible

9 No sounding

**Sounding flag of water depth in CTD, XCTD and BT data**.
Flag No.	Definition
1	Sounding by echo-sounder (not corrected)
2	Sounding by echo-sounder (corrected)
5	Water depth measured by CTD and altimeter
6	Water depth measured by BT or XCTD submersible
9	No sounding

Data flag in CTD, XCTD and BT data.
Flag No. Definition

2 Good

3 Doubtful

4 Bad

6 Interpolation by the separated layer over 2X10^4 Pa

7 Spike corrected

9 No data

Flag No.	Definition
2	Good
3	Doubtful
4	Bad
6	Interpolation by the separated layer over 2X10^4 Pa
7	Spike corrected
9	No data