Octets |
Key Name |
Comments |
1-4 |
section4Length |
Length of section in octets (nn) |
5 |
numberOfSection |
Number of section (4) |
6-7 |
NV |
Number of coordinate values after Template.
Coordinates values are intended to document the vertical discretisation
associated with model data on hybrid coordinate vertical levels.
A number of zero in octets 6-7 indicates that no such values are present.
Otherwise the number corresponds to the whole set of values.
|
8-9 |
productDefinitionTemplateNumber |
0 |
10 |
parameterCategory |
Parameter category according to Code Table 4.1 for Discipline 0:
0 | Temperature |
1 | Moisture |
2 | Momentum |
3 | Mass |
4 | Short-wave radiation |
5 | Long-wave radiation |
6 | Cloud |
20 | Atmospheric chemical constituents |
|
11 |
parameterNumber |
Parameter number according to Code Table 4.2:
For every discipline and category there is a group of parameter numbers. Please see the official
WMO Tables
or the ECMWF Manual Pages
for these numbers. |
12 |
typeOfGeneratingProcess |
Type of generating process according to Code Table 4.3:
0 | Analysis |
1 | Initialization |
2 | Forecast |
4 | Ensemble forecast |
|
13 |
backgroundProcess |
Background generating process identifier (defined by originating centre) |
14 |
generatingProcessIdentifier |
Analysis or forecast generating processes identifier (defined by originating centre) |
15-16 |
hoursAfterDataCutoff |
Hours of observational data cutoff after reference time |
17 |
minutesAfterDataCutoff |
Minutes of observational data cutoff after reference time |
18 |
indicatorOfUnitOfTimeRange |
Indicator of unit of time range according to Code Table 4.4:
0 | Minute |
1 | Hour |
2 | Day |
3 | Month |
4 | Year |
5 | Decade (10 years) |
6 | Normal (30 years) |
7 | Century (100 years) |
8-9 | Reserved |
10 | 3 hours |
11 | 6 hours |
12 | 12 hours |
13 | Second |
14-191 | Reserved |
192-254 | Reserved for local use |
255 | Missing |
|
19-22 |
forecastTime |
Forecast time in units defined by octet 18 |
23 |
typeOfFirstFixedSurface |
Type of first fixed surface according to Code Table 4.5:
0 | Reserved |
1 | Ground or water surface |
2 | Cloud base level |
3 | Level of cloud tops |
4 | Level of 0°C isotherm |
5 | Level of adiabatic condensation lifted from the surface |
6 | Maximum wind level |
7 | Tropopause |
8 | Nominal top of the atmosphere |
9 | Sea bottom |
10 | Entire atmosphere |
11 | Cumulonimbus (CB) base m |
12 | Cumulonimbus (CB) top m |
13-19 | Reserved |
20 | Isothermal level K |
21-99 | Reserved |
100 | Isobaric surface Pa |
101 | Mean sea level |
102 | Specific altitude above mean sea level m |
103 | Specified height level above ground m |
104 | Sigma level "sigma" value |
105 | Hybrid level |
106 | Depth below land surface m |
107 | Isentropic (theta) level K |
108 | Level at specified pressure difference from ground to level Pa |
109 | Potential vorticity surface K m2 kg-1 s-1 |
110 | Reserved |
111 | Eta∗ level |
112-116 | Reserved |
117 | Mixed layer depth m |
118 | Hybrid height level |
119 | Hybrid pressure level |
120-149 | Reserved |
150 | Generalized vertical coordinate (under validation) |
151-159 | Reserved |
160 | Depth below sea level m |
161-191 | Reserved |
192-254 | Reserved for local use |
255 | Missing |
|
24 |
scaleFactorOfFirstFixedSurface |
Scale factor of first fixed surface |
25-28 |
scaledValueOfFirstFixedSurface |
Scaled value of first fixed surface |
29 |
typeOfSecondFixedSurface |
Type of second fixed surface according to Code Table 4.5 (see above) |
30 |
scaleFactorOfSecondFixedSurface |
Scale factor of second fixed surface |
31-34 |
scaledValueOfSecondFixedSurface |
Scaled value of second fixed surface |
35-nn |
pv |
Optional list of coordinate values. These are encoded in IEEE 32-bit floating point format |