Octet |
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 |
Analysis or forecast generating process identifier (defined by originating centre) |
15-16 | Hours of observational data
cutoff after reference time (see Note 1) |
17 |
Minutes of observational data
cutoff after reference time |
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 surface (see Code Table 4.5) |
30 |
Scale factor of second fixed
surface |
31-34 | Scaled value of second fixed surface |
35-38 | Total number of data values
missing in the statistical process |
39 |
Statistical process used to
calculate the processed field from the field at each time increment
during the time range (see Code Table 4.10) |
40 |
Type of time increment between
successive fields used in the statistical processing (see Code
Table 4.11) |
41 |
Indicator of unit of time for
time range over which processing is dome (see Code Table 4.4) |
42-45 |
Length of the time range over
which statistical processing is done, in units defined by the previous
octet |
46 |
Indicator of unit of time for
increment between the successive fields used (see Code
Table 4.4) |
47-50 |
Time increment between
successive fields, in units defined by the previous octet (see Note 3) |
Note : (1) Hours greater than 65534 will be coded as 65534. (2) Reference = reference time (section 1) + forecast range (PDT) + offset and increments from reference time (GDT). (3) An increment of zero means that the statistical processing is the result of a continuous (or new continuous) process, not the processing of of a number of discrete samples. Examples of such continuous processes are the temperatures measured by a analogue maximum and minimum thermometers or thermographs and the rainfall measured by a rain gauge. |