Description
Return brightness-temperature difference and relative reference gap.
Atmospheric optical and radiation quantities distinguish spectral density, integrated flux, solid-angle response and reporting codes. A local attenuation factor, bin contribution or coverage bound requires compatible geometry and definitions rather than establishing a complete radiative transfer or observed cloud state.
Return brightness-temperature difference and relative reference gap.
When to use this tool
Use Brightness Temperature Reference Gap when checking the stated optical, radiometric, cloud-code or coverage convention.
How to use the tool and how it works
- Enter measuredKelvin, referenceKelvin. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read gapKelvin, relativeGap. Use the output convention below.
Return brightness-temperature difference and relative reference gap. Require measuredKelvin >= 0 and referenceKelvin > 0; gap = measured-reference, relativeGap = gap/reference.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| measuredKelvin | Measured Kelvin | Required. Finite number; minimum 0. |
| referenceKelvin | Reference Kelvin | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| gapKelvin | Gap Kelvin | Required. Finite number. |
| relativeGap | Relative Gap | Required. Finite number. |
{
"input": {
"measuredKelvin": 300,
"referenceKelvin": 250
},
"output": {
"gapKelvin": 50,
"relativeGap": 0.2
}
}Limitations and assumptions
- Temperatures are supplied; no radiance inversion, emissivity correction or actual physical surface temperature is established.
- 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.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use the source-specific observation code table and an appropriate calibrated spectral/atmospheric model for actual cloud or radiative interpretation.
References
Similar or alternative tools
- Atmospheric Emissivity Blackbody Flux Term
Return gray-emitter Stefan-Boltzmann flux.
- Atmospheric Bin Radiance Weight
Return response-weighted spectral-bin contributions.