| Octet No. | Contents |
|---|---|
| 10 |
Parameter category (see Code table 4.1) |
| 11 |
Parameter number (see Code table 4.2) |
| 12-13 |
Input process identifier (see Note 1) |
| 14-15 |
Input originating centre (see ON388 Table 0 and Note 2) |
| 16 |
Type of post-processing (see Note 3) |
| 17 |
Type of generating process (see Code table 4.3) |
| 18 |
Background generating process identifier (defined by originating centre) |
| 19 |
Forecast generating process identifier (see ON388 Table A) |
| 20-21 |
Hours after reference time of data cut-off (see Note 4) |
| 22 |
Minutes after reference time of data cut-off |
| 23 |
Indicator of unit of time range (see Code table 4.4) |
| 24-27 |
Forecast time in units defined by octet 18 (see Note 5) |
| 28 |
Type of first fixed surface (see Code table 4.5) |
| 29 |
Scale factor of first fixed surface |
| 30-33 |
Scaled value of first fixed surface |
| 34 |
Type of second fixed surface (see Code table 4.5) |
| 35 |
Scale factor of second fixed surface |
| 36-39 |
Scaled value of second fixed surface |
| 40-41 |
Total number of quantiles (q) |
| 42-43 |
Quantile value (between 0 and q) |
| 44-45 |
Year of end of overall time interval |
| 46 |
Month of end of overall time interval |
| 47 |
Day of end of overall time interval |
| 48 |
Hour of end of overall time interval |
| 49 |
Minute of end of overall time interval |
| 50 |
Second of end of overall time interval |
| 51 |
n - number of time range specifications describing the time intervals used to calculate the statistically processed field |
| 52-55 |
Total number of data values missing in the statistical process |
| 56-67 Specification of the outermost (or only) time range over which statistical processing is done |
|
| 56+(nt-1)*12 |
Statistical process used to calculate the processed field from the field at each time increment during the time range (see Code table 4.10) |
| 57+(nt-1)*12 |
Type of time increment between successive fields used in the statistical processing (see Code table 4.11) |
| 58+(nt-1)*12 |
Indicator of unit of time for time range over which statistical processing is done (see Code table 4.4) |
| 59+(nt-1)*12-62+(nt-1)*12 |
Length of the time range over which statistical processing is done in units defined by octet 53+(nt-1)*12 |
| 63+(nt-1)*12 |
Indicator of unit of time for the increment between the successive fields used (see Code table 4.4) |
| 64+(nt-1)*12-67+(nt-1)*12 |
Time increment between successive fields in units defined by octet 58+(nt-1)*12 (see Note 6) |
| 68+(NT-1)*12 |
Type of reference dataset (see Code table 4.100) |
| 69+(NT-1)*12 |
Type of relation to reference dataset (see Code table 4.101) |
| 70+(NT-1)*12 |
Number of additional parameters for reference period (NA) (see Note 7) |
| The next two entries are repeated NA times na=0:NA - can be 0 times if no parameters are necessary |
|
| 71+(NT-1)*12+(na-1)*5 |
Scale factor of additional parameters for reference period |
| (72+(NT-1)*12+(na-1)*5)-(75+(NT-1)*12+(na-1)*5) |
Scaled value of additional parameters for reference period |
| End of repeated NA sequence |
|
| (71+(NT-1)*12+NA*5)-(72+(NT-1)*12+NA*5) |
Year of start of reference period |
| 73+(NT-1)*12+NA*5 |
Month of start of reference period |
| 74+(NT-1)*12+NA*5 |
Day of start of reference period |
| 75+(NT-1)*12+NA*5 |
Hour of start of reference period |
| 76+(NT-1)*12+NA*5 |
Minute of start of reference period |
| 77+(NT-1)*12+NA*5 |
Second of start of reference period |
| (78+(NT-1)*12+NA*5)-(81+(NT-1)*12+NA*5) |
Sample size of reference period |
| 82+(NT-1)*12+NA*5 |
Number of reference period time range (NR) (see Note 8) |
| The next three entries are repeated NR times nr=1:NR |
|
| 83+(NT-1)*12+NA*5+(nr-1)*6 |
Type of statistical processing for time range for reference period (see Code table 4.102) |
| 84+(NT-1)*12+NA*5+(nr-1)*6 |
Indicator of unit of time range for reference period (see Code table 4.4) |
| (85+(NT-1)*12+NA*5+(nr-1)*6)-(88+(NT-1)*12+NA*5+(nr-1)*6) |
Length of time range for reference period |
| End of repeated NR sequence |
| Notes: (1) The input process identifier shall have the value of the "analysis or forecast process identifier" of the original GRIB message used as input of the post-processing. (2) The input originating centre shall have the value of the "originating centre" of the original GRIB message used as input of the post-processing. (3) This identifies which post-processing technique was used. This is defined by the originating centre. (4) Hours greater than 65534 will be coded as 65534 (5) The reference time in section 1 and the forecast time together define the beginning of the overall time interval. (6) An increment of zero means that the statistical processing is the result of a continuous (or near-continuous) process, not the processing of a number of discrete samples. Examples of such continuous processes are the temperatures measured by analogue maximum and minimum thermometers or thermographs, and the rainfall measured by a rain gauge. (7) See notes under Code table 4.101 for details. (8) 'Number of reference period time range' is used to define an outer and, if needed, one or more inner loops. The outer loop gives the overall date and time range of the reference period and the inner loop(s) specify a sub-period over all time instances defined in the outer loop in terms of the time unit defined by 'Reference period indicator of unit for time increment'. Typically the outer loop defines a number of years and inner loop defines the date and time range within each year: for instance 'every January for 30 years'. |