Section 4 - Template 1101 : Hovmöller-type grid with averaging or other statistical processing Preliminary Note: This template is simply experimental, was not validated at the time of publication and should be used only for bi-lateral previously agreed tests. (Octets 35-50 very similar to octets 43-58 of PDT 4.8, but meaning of some fields differs slightly)

Octets Key Type Content
10 parameterCategory codetable Parameter category (see Code Table 4.1).
11 parameterNumber codetable Parameter number (see Code Table 4.2).
12 typeOfGeneratingProcess codetable Type of generating process (see Code Table 4.3)
13 backgroundProcess unsigned Background generating process identifier (defined by originating centre)
14 generatingProcessIdentifier unsigned Analysis or forecast generating processes identifier (defined by originating centre)
15-16 hoursAfterDataCutoff unsigned Hours of observational data cutoff after reference time (see Note 1)
17 minutesAfterDataCutoff unsigned Minutes of observational data cutoff after reference time
18 indicatorOfUnitOfTimeRange codetable Indicator of unit of time range (see Code Table 4.4)
19-22 forecastTime signed Forecast time in units defined by octet 18 (see Note 2)
23 typeOfFirstFixedSurface codetable Type of first fixed surface (see Code Table 4.5)
24 scaleFactorOfFirstFixedSurface signed Scale factor of first fixed surface
25-28 scaledValueOfFirstFixedSurface unsigned Scaled value of first fixed surface
29 typeOfSecondFixedSurface codetable Type of second fixed surface (see Code Table 4.5)
30 scaleFactorOfSecondFixedSurface signed Scale factor of second fixed surface
31-34 scaledValueOfSecondFixedSurface unsigned Scaled value of second fixed surface
35-38 numberOfMissingInStatisticalProcess unsigned Total number of data values missing in the statistical process
39 typeOfStatisticalProcessing codetable 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 typeOfTimeIncrement codetable Type of time increment between successive fields used in the statistical processing (see Code Table 4.11)
41 indicatorOfUnitForTimeRange codetable Indicator of unit of time for time range over which statistical processing is done (see Code Table 4.4)
42-45 lengthOfTimeRange unsigned Length of the time range over which statistical processing is done, in units defined by the previous octet
46 indicatorOfUnitForTimeIncrement codetable Indicator of unit of time for increment between the successive fields used (see Code Table 4.4)
47-50 timeIncrement unsigned Time increment between successive fields, in units defined by the previous octet (see Note 3)
Notes:

( 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 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.