Description
Multiply observedRate by coveredDuration and fullDuration, and return their duration ratio.
Coverage measures describe how much of a stated observation domain has supplied support. Pixel-count, time-weighted, and area-weighted shares answer different questions and need explicit denominators.
Multiply observedRate by coveredDuration and fullDuration, and return their duration ratio.
When to use this tool
Use Radar Bin Time Coverage Factor when you need a bounded weather-observation support component.
How to use the tool and how it works
- Enter observedRate, coveredDuration, fullDuration. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read observedIntegral, fullBinEquivalent, coveredFraction. Use the output convention below.
Require positive fullDuration and coveredDuration within it. Multiply observedRate by coveredDuration and fullDuration, and return their duration ratio.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| observedRate | Observed Rate | Required. Finite number. |
| coveredDuration | Covered Duration | Required. Finite number; minimum 0. |
| fullDuration | Full Duration | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| observedIntegral | Observed Integral | Required. Finite number. |
| fullBinEquivalent | Full Bin Equivalent | Required. Finite number. |
| coveredFraction | Covered Fraction | Required. Finite number. |
{
"input": {
"observedRate": 2,
"coveredDuration": 5,
"fullDuration": 10
},
"output": {
"observedIntegral": 10,
"fullBinEquivalent": 20,
"coveredFraction": 0.5
}
}Limitations and assumptions
- Rate and duration units must combine consistently; fullBinEquivalent extrapolates the supplied rate across missing time and is not an observed full-bin total.
- 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
Keep observed coverage separate from extrapolated totals and assess missing-data mechanisms before filling gaps.
References
Similar or alternative tools
- Radar Pixel Support Share
Count supported included pixels and included pixels, divide for share, or return share zero with defined false when none are included.
- Storm Hyetograph One Bin Volume Term
Multiply depthMm by areaKm2, coveredFraction in [0, 1], and 1000 for volumeM3.