This page contains a few rules on the UERRA parameters. A complete list of all the parameters and GRIB2 encoding is given here.
ECMWF makes available a GRIB decoding library (GRIB-API) for the benefit of the WMO community. GRIB-API can be freely downloaded from here and the documentation can be found here. The GRIB-API provides a simplified access to GRIB2 headers through a set of virtual keys documented her
The version of GRIB-API which can recognise all UERRA parameters is currently under development and should be released to some extent by the 1st half of June. Until then please use the version 1.15.0 which can identify UERRA products as per below (paragraph 1). |
Section 1 | |||
---|---|---|---|
Octets | Key name | Value | Description |
6-7 | centre | 82 | 82 (Sweden) |
10 | tablesVersion | 17 | latest WMO table with some new definitions for UERRA |
20 | productionStatusOfProcessedData | 8 | operational UERRA products |
9 | test UERRA products | ||
21 | typeOfProcessedData | 0 | Analysis products |
1 | Forecast products |
Deterministic system (both analysis and forecast products)
Section 4 | |||
---|---|---|---|
Octets | Key name | Value | Description |
8-9 | productDefinitionTemplateNumber | 0 | Analysis and Forecast products (instantaneous) (Analysis or forecast at a horizontal level or in a horizontal layer at a point in time (grib2/tables/17/4.0.table)) |
8 | Analysis and Forecast products (statisticially processed = accumulated/min/max values) (Average, accumulation, extreme values or other statistically processed values at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval (grib2/tables/17/4.0.table)) |
Ensembe DA system (both analysis and forecast products)
Section 4 | |||
---|---|---|---|
Octets | Key name | Value | Description |
8-9 | productDefinitionTemplateNumber | 1
| Analysis and Forecast products (instantaneous) (Individual ensemble forecast, control and perturbed, at a horizontal level or in a horizontal layer at a point in time (grib2/tables/17/4.0.table)) |
11 | Analysis and Forecast products (statisticially processed = accumulated/min/max values) (Individual ensemble forecast, control and perturbed, at a horizontal level or in a horizontal layer, in a continuous or non-continuous time interval (grib2/tables/17/4.0.table)) | ||
35 | type of ensemble forecast | 255 | missing |
36 | perturbation number | 2 | Example for 2nd eps member of ensemble with 4 members (0/1/2/3) |
37 | number of forecasts in ensemble | 4 |
deterministic | ensemble DA | |||
AN | FC | AN | FC | |
Accumulations | N/A | N/A | ||
Instantaneous | ||||
Maximum since previous post-processing | ||||
Minimum since previous post-processing | ||||
Parameter on soil level (soil temperature on soil level 1) |