Station Header Format

 

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Cruise Header
Station Header Format
Data  Format

Content

The station header includes  in the first lines mandatory information like the station identifier, date, time, location, list of observed parameters and units. The environmental information on the observations  archived either behind " *DC= " (for Data collection), other relevant information behind  "*DM=" (for Data Management) or "COMMENT" is optional.

Description

BP =Beginning Position; SL = string length

NP = number of observed parameters incl. the reference (pressure);

NCO = number of comment lines in the header

 

LINE

FIELD

DESCRIPTION

BP

SL

TYPE

1

start character

*

1

1

char

M

reference

MEDATLAS ref. (cruise+station+cast)

2

18

char

M

key word

'Data Type='

21

10

char

M

data type

ROSCOP code

31

3

char

M

2

date

'*DATE=', DDMMYYYY

1

14

char

M

time

'TIME=',HHMN

16

9

char

NB

latitude N/S

'LAT=', N or S

26

5

char

M

lat. degrees

latitude degrees (0 to 90)

31

2

char

M

lat. minutes

latitude minutes.hundredth

34

5

char

M

longitude E/W

'LON=', E or W

40

5

char

M

long. degrees

longitude degrees (0 to 180)

45

3

char

M

long. minutes

minutes.hundredth

49

5

char

M

key word

'DEPTH='

55

6

char

NB

bottom depth

bottom depth in metres

61

6

num

M

key word

'QC='

68

3

char

M

time flag

QC flag on date and time

71

1

num

M

lat. flag

QC flag on latitude

72

1

num

M

long. flag

QC flag on longitude

73

1

num

M

depth flag

QC flag on bottom depth

74

1

num

M

3

key word

'*NB PARAMETERS= '

1

15

char

M

nb. of columns

number of measured parameters (NP)

16

2

num

M

key word

'RECORD LINES='

19

13

char

M

number of lines

number of observations records (NL)

3

2 5

num

M

3+1

TO

3+NP

1st character

'*'

1

1

char

M

title column p

GF3 code for parameter p

2

4

char

M

name of parameter p

parameter full name (IOC def.)

7

30

char

M

unit of parameter p

( 'IS/IOC unit' )

37

30

char

M

key word

'def.='

68

5

char

M

default value of parameter p

string of '9'.string of '9'
same format as the parameter p

73

nlen(

np) num

M

4+NP

key word

'*GLOBAL PROFILE QUALITY FLAG='

1

29

char

M

profile QC

global quality flag value

30

1

num

M

key word

'GLOBAL PARAMETERS QC FLAGS='

32

27

char

M

profile QC

global Q flags for parameter N

50

N

num

M

5+NP

collect hist.1

'*DC HISTORY='method, instrum. etc

1

80

char

O

6+NP

collect hist.2

'*', continuation

1

80

char

O

7+NP

archv. hist.1

'*DM HISTORY', data mangt. history

1

80

char

O

8+NP

archv. hist.2

'*', end of data management

1

80

char

O

9+NP

comment 1

'*COMMENT ', first comment line

1

80

char

O

10+NP

TO

8+NP+NCO

comment 2

'*' optional information 'EDATE=',

1

15

char

O

keyword + value

'ETIME=',HHMN

17

10

char

O

keyword + value

'ELAT=', N or S

28

5

char

O

latitude degrees (0 to 90)

34

2

char

O

latitude minutes.hundredth

37

5

char

O

keyword + value

'ELON=', E or W

43

5

char

O

longitude degrees (0 to 180)

49

3

char

O

minutes.hundredth

52

5

char

O

keyword

'EDEPTH='

59

6

char

O

bottom depth in meter

66

6

num

O

keyword + value

'*SECCHI DISK='

1

80

char

O

comment

'*' any other information to archive

1

80

char

O

comment

'*', last comment line

1

80

char O

O

9+NP+NCO

surface obs. 1

*SURFACE SAMPLES=', samples

1

80

char

O

10+NP+NCO

surface obs. 2

'*' continuation

1

80

char O

O

LAST

start character

*

1

1

char

M

title 1

'PRES' or ref. parameter

2

4

char

M

separator

blank

6

nlen(1)-4

blank

M

title 2

GF3 code parameter 2

bp(2)

4

char

M

separator

bp(np-1)+4

nlen(np-1)-3

blank

M

title np

GF3 code parameter np

bp(np)

4

char

M

 

Explanations

        1. First character of the header lines
        2. All the lines begin with the character " * ".

        3. Latitude and Longitude
        4. In order to avoid ambiguity, N/S and E/W are specified for latitude and longitude instead of signs.

        5. Missing information
        6. Missing time should be assigned to '9999' and "TIME IS UNKNOWN" added in comment line.

          Other missing information (when optional) in character strings: 'X' as many times as the missing string length or 'UNKNOWN' or ‘9’ for numerical values (like bottom depth).

        7. Parameters List
        8. The first observed parameter is the reference, which for vertical profiles must be the pressure in decibar.

          The list of each observed parameter (pressure,temperature, salinity, nutrients) include the parameter (extended) GF3 code, name, unit (International System) and default value. A different unit corresponds to a different parameter code.

        9. History and information on the data processing
        10. In order to maintain some flexibility with the format and not to loose existing complementary information on the data processing, meteorological observations etc. not taken into account in the format, three specific fields terminate each header profile:

          *DC HISTORY for the information linked to the data collection at sea (like instrument, calibration)

          *DM HISTORY for the information linked to the data management and archiving (like the source latitude if the sign or the value has been changed)

          *COMMENT for all optional data and meta data like time and location at the end of the profile, meteorological observations.

          Do not repeat keywords (ex use EDATE=, ETIME= ELAT=, ELON=, EDEPTH and not DATE, TIME, LAT, LON, DEPTH) to specify the end date, time, latitude, longitude and bottom depth of a station. The number of *COMMENT lines is not limited. All the meteorological information and the information behind the comment lines (end of the station, secchi disk, meteorological observations) is optional, but to access them easely, it is better to use GF3 codes as keywords (3.6)

        11. Last line

The last line begins with the character " * " and the parameter   GF3 codes as titles of the columns of observations. They should be the same as the list.

 

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