Description
Preserve explicit reported visibility and unit text.
Atmospheric values depend on pressure order, vertical datums, moisture definitions and reference conditions. Specific humidity uses moist-air mass as its denominator, whereas mixing ratio uses dry-air mass. A pressure-order flag differs from a temperature inversion, and a logarithmic-pressure weight can represent extrapolation.
Preserve explicit reported visibility and unit text.
When to use this tool
Use Fog Visibility Unit Reference Tag when you already have observationId, visibilityText, unitText and need to preserve explicit reported visibility and unit text.
How to use the tool and how it works
- Enter observationId, visibilityText, unitText. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read token. Use the output convention below.
Enter observationId, visibilityText, unitText using the field constraints below. Encode these values, in exactly that order, as a JSON array and return the serialized array as text in token. String values are preserved without trimming or external terminology lookup.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| observationId | Observation Id | Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 8192. |
| visibilityText | Visibility Text | Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 8192. |
| unitText | Unit Text | Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 8192. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| token | Token | Required. Text; maximum UTF-16 length 8192. |
{
"input": {
"observationId": "O17",
"visibilityText": "400",
"unitText": "m"
},
"output": {
"token": "[\"O17\",\"400\",\"m\"]"
}
}Limitations and assumptions
- The result records supplied values without classifying fog or making aviation decisions. Sources and asserted relationships are not independently authenticated.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
Alternative or Complementary methods
Use calibrated profile and station data with the complete atmospheric model. Preserve datum, humidity and pressure conventions and assess uncertainty before interpreting local terms as an observed layer, state or forecast.
References
Similar or alternative tools
- Station Wind Height Reference Label
Qualify an explicit station wind-measurement height by supplied datum wording.
- Dew Point Versus Frost Point Source Tag
Label a supplied dew-point or frost-point reference designation.