| 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 |