| Octet No. | Contents |
|---|---|
| 10 |
Parameter category (see Code
Table 4.1) |
| 11 |
Parameter number (see Code Table
4.2) |
| 12 |
Type of generating process (see
Code Table 4.3) |
| 13 |
Background generating process
identifier (defined by originating Centre) |
| 14 |
Forecast generating process identifier
(see Code ON388 Table A) |
| 15-16 |
Hours after reference time data
cutoff (see Note 1) |
| 17 |
Minutes after reference time
data cutoff |
| 18 |
Indicator of unit of time range
(see Code Table 4.4) |
| 19-22 |
Forecast time in units defined
by octet 18 (see Note 2) |
| 23 |
Type of first fixed surface (see
Code Table 4.5) |
| 24 |
Scale factor of first fixed surface |
| 25-28 |
Scaled value of first fixed
surface |
| 29 |
Type of second fixed surfaced
(see Code Table 4.5) |
| 30 |
Scale factor of second fixed
surface |
| 31-34 |
Scaled value of second fixed
surfaces |
| 35 |
Derived forecast (see
Code Table 4.7) |
| 36 |
Number of forecasts in the
ensemble (N) |
| 37-38 |
Year of end of overall time
interval |
| 39 |
Month of end of overall time
interval |
| 40 |
Day of end of overall time
overall time interval |
| 41 |
Hour of end of overall time
interval |
| 42 |
Minute of end overall time interval |
| 43 |
Second of end of overall
time interval |
| 44 |
n ― number of time ranges specifications describing the time intervals used to calculate the statistically-processed field |
| 45-48 |
Total number of data values missing in the statistical process |
| 49 - 60 Specification of the outermost (or only) time
range over which statistical processing is done |
|
| 49 |
Statistical process used to
calculate the processed field from the field at each time increment
during the time range (see Code Table 4.10) |
| 50 |
Type of time increment between successive fields used in the statistical processing (see Code Table 4.11) |
| 51 |
Indicator of unit of time
for time range
over which statistical processing is done (see Code Table 4.4) |
| 52-55 |
Length of the time range over
which statistical processing is done, in units defined by the previous
octet |
| 56 |
Indicator of unit of time for
the increment between the successive fields used (see Code Table 4.4) |
| 57-60 |
Time increment between successive fields, in units defined by the previous octet (see Notes 3 and 4) |
| 61 - nn These octets are included only if n>1, where nn = 48 + 12 x n | |
| 61-72 |
As octets 49 to 60, next
innermost
step of processing |
| 73-nn |
Additional time range
specifications, included in accordance with the value of n,
Contents as octets 49 to 60, repeated as necessary. |
| Notes: (1) Hours greater than 65534 will be coded as 65534. (2) The reference time in section 1 and the forecast time together define the beginning of the overall time interval. (3) 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 guage. (4) The reference and forecast times are successively set to their initial values plus or minus the increment, as defined by the type of time increment (one of octets 50, 62, 74 ...). For all but the innermost (last) time range, the next inner range is then processed using these reference and forecast times as the initial references and forecast time. |