| Octet No. | Contents |
|---|---|
| 10 |
Parameter category (see Code
table 4.1) |
| 11 |
Parameter number (see Code table
4.2) |
| 12-13 |
Aerosol type (see
Code table 4.230) |
| 14 |
Source or sink (see
Code table 4.238) |
| 15 |
Type of interval for first and second sizes
(see Code Code Table 4.91) |
| 16 |
Scale factor of first size |
| 17-20 |
Scaled value of first size in metres |
| 21 |
Scale factor of second size |
| 22-25 |
Scaled value of second size in metres |
| 26 |
Type of generating process
(see Code table 4.3) |
| 27 |
Background generating process identifier (defined by originating centre) |
| 28 |
Analysis or forecast generating process identifier (defined by originating centre) |
| 29-30 |
Hours after reference time of data cut-off (see Note 1) |
| 31 |
Minutes after reference time of data cut-off |
| 32 |
Indicator of unit of time range
(see Code table 4.4) |
| 33-36 |
Forecast time in units defined by octet 32 (see Note 2) |
| 37 |
Type of first fixed surface
(see Code table 4.5) |
| 38 |
Scale factor of first fixed surface |
| 39-42 |
Scaled value of first fixed surface |
| 43 |
Type of second fixed surface
(see Code table 4.5) |
| 44 |
Scale factor of second fixed surface |
| 45-48 |
Scaled value of second fixed surface |
| 49-50 |
Year |
| 51 |
Month |
| 52 |
Day |
| 53 |
Hour |
| 54 |
Minute |
| 55 |
Second |
| 56 |
n - number of time range specifications describing the time intervals
used to calculate the statistically processed field |
| 57-60 |
Total number of data values missing in statistical process |
| 61-72 Specification of the outermost (or only) time range over which statistical processing is done | |
| 61 |
Statistical process used to calculate the processed field from the field at
each time increment during the time range (see Code table 4.10) |
| 62 |
Type of time increment between successive fields used in the statistical processing
(see Code table 4.11) |
| 63 |
Indicator of unit of time for time range over which statistical processing is done
(see Code table 4.4) |
| 64-67 |
Length of the time range over which statistical processing is done,
in units defined by the previous octet |
| 68 |
Indicator of unit of time for the increment between the successive fields used
(see Code table 4.4) |
| 69-72 |
Time increment between successive fields, in units defined by the previous octet
(see Notes 3 and 4) |
| 73-nn These octets are included only if n > 1, where nn = 60 + 12 x n |
|
| 73-84 |
As octets 61 to 72, next innermost step of processing |
| 85-nn |
Additional time range specifications, included in accordance with the value of n. Contents as octets 61 to 72, 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 gauge. 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 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 reference and forecast times. |