Description
Convert reflectivityDbz to linearReflectivity as 10^(dBZ/10), then compute (linearReflectivity/A)^(1/B).
A radar reflectivity-to-rain relation uses supplied coefficients to connect logarithmic reflectivity with a rain-rate model. A one-point conversion is conditional on that relation and its unit convention.
Convert reflectivityDbz to linearReflectivity as 10^(dBZ/10), then compute (linearReflectivity/A)^(1/B).
When to use this tool
Use Radar Rain Rate Supplied Zr Point when you need to evaluate one explicit radar-rain model point.
How to use the tool and how it works
- Enter reflectivityDbz, coefficientA, exponentB. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read linearReflectivity, rainRate. Use the output convention below.
Require positive coefficientA and exponentB. Convert reflectivityDbz to linearReflectivity as 10^(dBZ/10), then compute (linearReflectivity/A)^(1/B).1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| reflectivityDbz | Reflectivity in logarithmic dBZ under the model convention. | Required. Finite number. |
| coefficientA | Positive supplied Z=A·R^B coefficient on the intended reflectivity/rain-rate unit basis. | Required. Finite number; strictly above 0. |
| exponentB | Positive supplied exponent B. | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| linearReflectivity | Linear Reflectivity | Required. Finite number. |
| rainRate | Rain Rate | Required. Finite number. |
{
"input": {
"reflectivityDbz": 30,
"coefficientA": 250,
"exponentB": 1.5
},
"output": {
"linearReflectivity": 1000,
"rainRate": 2.5198420997897464
}
}Limitations and assumptions
- Rain-rate units depend on the supplied Z=A·R^B coefficients and their reflectivity convention; coefficients are not selected or validated, and no radar bias or precipitation-type correction is made.
- 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
Review calibration, precipitation type, attenuation, and suitable gauge comparisons before interpreting actual rainfall.
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.
- Radar Bin Time Coverage Factor
Multiply observedRate by coveredDuration and fullDuration, and return their duration ratio.