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Radiometer Field Of View Share Tool

Calculate radiometer field of view share from explicit caller-supplied inputs.

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Description

Return accepted solid-angle share and throughput-weighted share.

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 accepted solid-angle share and throughput-weighted share.

When to use this tool

Use Radiometer Field Of View Share when checking the stated optical, radiometric, cloud-code or coverage convention.

How to use the tool and how it works

  1. Enter acceptedSolidAngle, referenceSolidAngle, throughputFraction. Use the units and conventions below.
  2. Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
  3. Read angularShare, throughputWeightedShare. Use the output convention below.

Return accepted solid-angle share and throughput-weighted share. Require referenceSolidAngle > 0, accepted within it and throughputFraction in [0,1]; divide angles and multiply by throughput.1

Input fieldMeaning and unitsAccepted input
acceptedSolidAngleAccepted Solid AngleRequired. Finite number; minimum 0.
referenceSolidAngleReference Solid AngleRequired. Finite number; strictly above 0.
throughputFractionThroughput FractionRequired. Finite number; minimum 0; maximum 1.
Output fieldInterpretationReturned shape
angularShareAngular ShareRequired. Finite number.
throughputWeightedShareThroughput Weighted ShareRequired. Finite number.
json
{
  "input": {
    "acceptedSolidAngle": 1,
    "referenceSolidAngle": 4,
    "throughputFraction": 0.5
  },
  "output": {
    "angularShare": 0.25,
    "throughputWeightedShare": 0.125
  }
}

Limitations and assumptions

  • This uniform angular weighting is not an actual radiance integral, calibrated instrument response or scene reconstruction.
  • 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

  1. Calculation and input contract: atmospheric-physics/radiometer-field-of-view-share — tool.io

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