new templates for probability forecasts based on focal statistics about grib2 HOT 8 CLOSED

https://github.com/wmo-im/CCT/wiki/Teleconference.17.18.October.2023 notes:
Sebastien introduced the proposal; team has no questions yet

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https://github.com/wmo-im/CCT/wiki/Teleconference.21.22.November.2023 notes:
@sebvi add note on the units; Sebastien will update the branch and prepare samples;

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https://github.com/wmo-im/CCT/wiki/Teleconference.21.29.November.2023 notes:

in progress; add images as appendix with proper credit if needed;

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branch updated

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Adding the appendix to explain better the concepts behind focal statistics. Thanks to @rdosinski for preparing the appendix
Appendix_FocalStatsProposals.docx

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I am attaching a sample file together with the original field be fore applying the focal statistics

GRIB2_225.zip

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https://github.com/wmo-im/CCT/wiki/Teleconference.10.January.2024 notes:

Sebastien added a doc for an appendix; @sebvi will update the proposal; @SibylleK to validate the sample; @amilan17 revalidate the branch

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I tried to validate the sample (only from a purely technical point of view).
The entries in section 4 of the GRIB example file PDTN_121_upscaled_tprate.grib2 were read with a DWD GRIB reader software and the entries were the same as in an output of eccodes grib_dump.

Here are some comments:

• Regarding the "Spatial Vicinity Value", I would propose to name it "List of spatial vicinity values" in both templates, as the entry should be repeated NSV times.
• In the csv-Files I stumbled across some "EN_DASH" (UTF-8(hex) = e28093) instead of a normal "HYPHEN-MINUS" (UTF-8(hex) = 2d) :
  1. at "54,Number of Spatial Vicinity Values – NSV" and
  2. "(55+(nsv-1)*4) – (58+(nsv-1)*4)" in GRIB2_Template_4_121_ProductDefinitionTemplate_en.csv
  3. at "nn + 2,Number of Spatial Vicinity Values – NSV" and
  4. "(nn + 3+(nsv-1)*4)–(nn + 6+(nsv-1)*4)" in GRIB2_Template_4_122_ProductDefinitionTemplate_en.csv

@amilan17, @sebvi , I hope it is not to late to make these minor changes.

Apart from that, from a technical point of view, the proposal can be considered validated.

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