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WIGOS Metadata Standard: Semantic standard and code tables
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Table 5-02-01, add descriptions #499

Closed amilan17 closed 4 months ago

amilan17 commented 1 year ago

Initial request

add descriptions to existing codes, this was originally a part of issue #336

Amendment details

notation path name description
190 /Atmosphere/Visual range/Remote-sensing, active/ Scatterometer Visual range is calculated by measuring the return of light beam scattered by diffusion in air.
207 /Atmosphere/Visual range/Remote-sensing, active/ Transmissometer Visual range is calculated by measuring the extinction coefficient of a beam of energy passing through a volume of air.
24 /Atmosphere/Clouds/ Human observation Observation of clouds from the Earth's surface by a human observer (ref: https://cloudatlas.wmo.int/en/observation-of-clouds-from-the-earths-surface.html)

Comments

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Requestor(s)

TT-WIGOSMD

Stakeholder(s)

Enter list of stakeholder(s).

Publication(s)

Example: Manual on Codes (WMO-No. 306), Volume I.3, WMO Codes Registry

Expected impact of change

None

Collaborators

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References

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Validation

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meulenvd commented 9 months ago

Both definitions to be harmonized because the technology and methods are comparable. Visual range is only used for aeronautical practices: Runway Visual Range (RVR); Visual Range is for human beings, but subjective because a human beings vision qualities is undefined. Therefore, for meteorology the term visibility is used, which is equal to meteoprological optical range (MOR), which is a physical variable and uniquely related to the exctintion coefficient

190 | /Atmosphere/Visual range/Remote-sensing, active/ | Scatterometer | Visual range is calculated by measuring the return of light beam scattered by diffusion in air.

proposal: Visual range is calculated by measuring the return of light beam scattered by diffusion in air. --> Visibility, determined from the relative amount of light scattered by a volume of air.

207 | /Atmosphere/Visual range/Remote-sensing, active/ | Transmissometer | Visual range is calculated by measuring the extinction coefficient of a beam of energy sent through a volume of air.

proposal: Visual range is calculated by measuring the extinction coefficient of a beam of energy sent through a volume of air. --> Visibility, determined from the relative amount of light passing a volume of air.

joergklausen commented 8 months ago

I support this, with maybe a slight addition: ... passing [through] a volume of air.

meulenvd commented 8 months ago

passing (through) is fine

amilan17 commented 5 months ago

https://github.com/wmo-im/tt-wigosmd/wiki/2024.01.18-TT-WIGOSMD notes:

@meulenvd -- I updated the proposal. (see issue summary at the top). If these changes are approved by you and the team within a week or two, we can include this proposal in FT2024-1.

meulenvd commented 4 months ago

https://github.com/wmo-im/tt-wigosmd/wiki/2024.01.18-TT-WIGOSMD notes:

@meulenvd -- I updated the proposal. (see issue summary at the top). If these changes are approved by you and the team within a week or two, we can include this proposal in FT2024-1.

@amilan17 , @joergklausen - I think it's fine now.