Each data file contains one line header (meta data) followed by data lines for each cast.
The number of data lines are recorded in the header.
- Header part
No. |
Column |
Content |
Format |
Remarks |
1 |
1 |
Header ID |
a1 |
fixed as '#' |
2 |
3 - 6 |
Data ID |
a4 |
XBT |
3 |
8 - 22 |
Cruise ID |
a15 |
|
4 |
33 - 40 |
Date |
i8 |
YYYYMMDD (UTC) |
5 |
42 - 45 |
Time |
i4 |
hhmm (UTC) |
6 |
47 - 55 |
Latitude |
i2,a1,f5.2,a1 |
dd-mm.mmN(S) |
7 |
57 - 66 |
Longitude |
i3,a1,f5.2,a1 |
ddd-mm.mmE(W) |
8 |
68 - 71 |
Number of data lines |
i4 |
|
9 |
72 - 73 |
Terminator |
- |
CR+LF |
- Data part
No. |
Column |
Content |
Unit |
Format |
Remarks |
1 |
1 - 11 |
Depth |
m |
f11.1 |
|
2 |
12 - 22 |
Temperature |
deg-C |
f11.2 |
ITS-90 |
3 |
45 - 55 |
Flag |
- |
i11 |
1 - 7 : space 8 : flag of depth 9 : flag of temperature 10 - 11 : space * reference : 'Definition of Quality Control Flags' |
4 |
56 - 57 |
Terminator |
- |
- |
CR+LF |
Each contents of the data part is stored in 11 bytes.
Missing value is presented by '-5', and error value is presented by '-9'.
- Depth Flags
0 - accepted value
1 - error in recorded depth ( same or less than previous depth )
2 - density inversion
- Observed Level Flags
N - missing value
0 - accepted value
1 - range outlier ( outside of broad range check )
2 - failed inversion check
3 - failed gradient check
4 - zero anomaly
5 - failed combined gradient and inversion checks
6 - failed range and inversion checks
7 - failed range and gradient checks
8 - failed range and zero anomaly checks
9 - failed range and combined gradient and inversion checks
A - failed visual check
* Range and gradient check is performed to XBT data.
QCed data were added flag according to the NODC (National Oceanographic Data Center) quality control procedure, additionally visually checked. Please see the site of NODC of the following link for quality control procedure.