File Format of Subsurface current data

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Subsurface current data consist of Cruise Information record (HEADER) and subsurface temperature data records (DATA) obtained during the cruise. The "REC_IND" field definition is the same as one in the Hydrographic station data.

HEADER (Cruise Information)
Element name Start Pos. Field Type Description of Field

Format Code 1 A4 Format Code of the file: 'A1.1'

Cruise No 6 I4 Cruise number identified with the year and the month.

Period 11 2(2I2,1X) Date of beginning and end of the observation.

Area 21 A98 Observation area.

No of Stn 119 I4 Number of stations.

Ship Code 124 A2 Ship Code (listed in Table)

REC_IND 126 A1 '@'

**HEADER** **(Cruise Information)**
Element name	Start Pos.	Field Type	Description of Field
Format Code	1	A4	Format Code of the file: 'A1.1'
Cruise No	6	I4	Cruise number identified with the year and the month.
Period	11	2(2I2,1X)	Date of beginning and end of the observation.
Area	21	A98	Observation area.
No of Stn	119	I4	Number of stations.
Ship Code	124	A2	Ship Code (listed in Table)
REC_IND	126	A1	'@'

DATA
Element name Start Pos. Field Type Description of Field

Station No 1 A3,I3 Staion number given by the ship code suffixed with three digits consective numbers.

Date/Time 8 2(2I2,1X) Month, day and time of an observation in JST.

Latitude 18 I2,1X,I2,I1,A1 Degrees, minutes and tenths of minutes (if given) of latitude, N or S.

Longitude 26 I3,1X,I2,I1,A1 Degrees, minutes and tenths of minutes (if given) of longitudes, E or W.

W-Depth 35 I4 Water depth to the bottom in meters.

No of Layer 40 I2 Number of observation layers.

Depth(1) 43 I4 Depth of the 1st(4th) layer in meters.

DIR/SPEED(1) 48 I3,1X,I2 True direction toward which current is flowing and speed given in tenths of knots of the subsurface current for the 1st (4th) layer determined with Acoustic Doppler Current Meter (ACM). When the speed is less than 0.05knots, direction is given as 0.

Depth(2) 55 I4 Same as above but for the 2nd (5th) layer.

DIR/SPEED(2) 60 I3,1X,I2 do.

Depth(3) 67 I4 Same as above but for the 3rd (6th) layer.

DIR/SPEED(3) 72 I3,1X,I2 do.

Ref 79 A2 Method to determine the ship velocity, which is used to calculate the absolute current velocity. (LC: Loran-C, GP: GPS, BM: Bottom track by ACM.)

Surf Temp 82 F5.2 or F4.1,1X Surface temperature in ITS-90.

Surf Sal. 88 F6.3 Surface salinity in PSS-78.

HYD-No 95 I4 Corresponding station number of the hydrographic data.

SSF-No 99 A2,I3 Corresponding station number of the subsurface temperature data.

Interval 105 I4 Time of averaging interval in seconds.

Ship-Dir 110 I3 Direction of the ship in degrees.

Ship-Spd 114 I3 Speed of the ship in tenths of knots.

Head 118 I3 Heading of the ship from gyro in degrees.

REC_IND 126 A1 '@' or '='

Element name	Start Pos.	Field Type	Description of Field
Station No	1	A3,I3	Staion number given by the ship code suffixed with three digits consective numbers.
Date/Time	8	2(2I2,1X)	Month, day and time of an observation in JST.
Latitude	18	I2,1X,I2,I1,A1	Degrees, minutes and tenths of minutes (if given) of latitude, N or S.
Longitude	26	I3,1X,I2,I1,A1	Degrees, minutes and tenths of minutes (if given) of longitudes, E or W.
W-Depth	35	I4	Water depth to the bottom in meters.
No of Layer	40	I2	Number of observation layers.
Depth(1)	43	I4	Depth of the 1st(4th) layer in meters.
DIR/SPEED(1)	48	I3,1X,I2	True direction toward which current is flowing and speed given in tenths of knots of the subsurface current for the 1st (4th) layer determined with Acoustic Doppler Current Meter (ACM). When the speed is less than 0.05knots, direction is given as 0.
Depth(2)	55	I4	Same as above but for the 2nd (5th) layer.
DIR/SPEED(2)	60	I3,1X,I2	do.
Depth(3)	67	I4	Same as above but for the 3rd (6th) layer.
DIR/SPEED(3)	72	I3,1X,I2	do.
Ref	79	A2	Method to determine the ship velocity, which is used to calculate the absolute current velocity. (LC: Loran-C, GP: GPS, BM: Bottom track by ACM.)
Surf Temp	82	F5.2 or F4.1,1X	Surface temperature in ITS-90.
Surf Sal.	88	F6.3	Surface salinity in PSS-78.
HYD-No	95	I4	Corresponding station number of the hydrographic data.
SSF-No	99	A2,I3	Corresponding station number of the subsurface temperature data.
Interval	105	I4	Time of averaging interval in seconds.
Ship-Dir	110	I3	Direction of the ship in degrees.
Ship-Spd	114	I3	Speed of the ship in tenths of knots.
Head	118	I3	Heading of the ship from gyro in degrees.
REC_IND	126	A1	'@' or '='