Land Surface in-situ data: data format
Land Surface in-situ data set description page
SYNOPS - Report of surface observation from a fixed land station
Organization of the file:
------------------------
Each data line contains 47 fields, separated by spaces. The contents and sizes
of the 47 fields that appear in each data record are as follows (Unit for Unit
or Code table (from the Manual oncodes (WMO-No. 306), International codes
volume I.2, part B), Form for FORTRAN Format, Miss for Missing value) :
No Parameter Unit Form. Miss
-- --------- ---- ----- ----
1 Timestamp for the creation of the row YYYYMMDDHHMISS a14
2 WMO station identifier a14
3 Latitude dec.degr f8.3
4 Longitude dec.degr f8.3
5 Altitude m i4 -999
6 Collecting date/time (UTC) YYYYMMDDHHMISS a14
7 Quality control flag (0=good, 1=bad) i4 -999
8 Air temperature deg. C f6.1 -999
9 Relative humidity % i4 -999
10 Wind direction degree f6.1 -999
11 Wind speed m/s f6.1 -999
12 Pressure hPa f6.1 -999
13 Pressure reduced to mean sea level hPa f6.1 -999
14 3-hour pressure change hPa f6.1 -999
15 Characteristic of pressure tendancy WMO tab 010063 i4 -999
16 Horizontal visibility m i5 -999
17 Present Weather WMO tab 020003 i4 -999
18 Past weather (1) WMO tab 020004 i4 -999
19 Past weather (2) WMO tab 020005 i4 -999
20 Total cloud cover % i4 -999
21 Amount of low clouds WMO tab 020011 i4 -999
22 Height of base of cloud m i4 -999
23 Low clouds type WMO tab 020012 i4 -999
24 Middle clouds type WMO tab 020012 i4 -999
25 High clouds type WMO tab 020012 i4 -999
26 Total precipitation past 1 hour kg/m2 f6.1 -999
27 Total precipitation past 3 hours kg/m2 f6.1 -999
28 Total precipitation past 6 hours kg/m2 f6.1 -999
29 Total precipitation past 12 hours kg/m2 f6.1 -999
30 Total precipitation past 24 hours kg/m2 f6.1 -999
31 Method of sea-surface temperature measurement WMO tab 002038 i4 -999
32 Sea-surface temperature deg. C f6.1 -999
33 Minimum temperature past 12 hours deg. C f6.1 -999
34 Minimum temperature past 24 hours deg. C f6.1 -999
35 Maximum temperature past 12 hours deg. C f6.1 -999
36 Maximum temperature past 24 hours deg. C f6.1 -999
37 State of the ground WMO tab 020062 i4 -999
38 Ground minimum temperature deg. C f6.1 -999
39 Total sunshine past 1 hour mn f6.1 -999
40 Period of the next measurement hour i4 -999
41 Global solar radiation, integrated over period spe J/m2 f10.1 -999
cified
42 Global solar radiation, integrated over 24 hours J/m2 f10.1 -999
43 Quality control flag for T i4 -999
44 Quality control flag for RH i4 -999
45 Quality control flag for WindD i4 -999
46 Quality control flag for WindS i4 -999
47 Quality control flag for P i4 -999
Data quality flags can take one of the following values :
automatic quality control procedures: 0=good 1=suspect 2=bad 3=not controlled
manually added flags: 5=good 6=suspect 7=bad 8=estimated 9=missing or not
controlled
Quality control procedures are explained in the document GTS_QC_handbook.ps that
can be found on the FASTEX anonymous ftp serveur (cnrm-ftp.cnrm.meteo.fr), in
the directory pub-fastex/doc
Updated: 22 Jan 1999
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