Description
Convert a supplied dBZ difference to a linear reflectivity ratio.
Atmospheric scalar terms require explicit averaging, spectral, geometric and propagation conventions. One fluctuation product is not a time-averaged flux, a squared deviation is not a full scintillation index, and a Nyquist interval does not de-alias radar velocity. Layer terms require compatible units and model assumptions.
Convert a supplied dBZ difference to a linear reflectivity ratio.
When to use this tool
Use Radar Dbz Linear Ratio when you already have firstDbz, secondDbz and need to convert a supplied dBZ difference to a linear reflectivity ratio.
How to use the tool and how it works
- Enter firstDbz, secondDbz. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read reflectivityRatio. Use the output convention below.
Return 10^((firstDbz-secondDbz)/10).1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| firstDbz | First Dbz | Required. Finite number. |
| secondDbz | Second Dbz | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| reflectivityRatio | 10^((firstDbz-secondDbz)/10), not a field-amplitude ratio. | Required. Finite number. |
{
"input": {
"firstDbz": 30,
"secondDbz": 20
},
"output": {
"reflectivityRatio": 10
}
}Limitations and assumptions
- The divisor ten applies to reflectivity, not an amplitude ratio. Inputs need comparable calibration; underflow can yield zero, and no rain rate, hydrometeor type or absolute reflectivity is inferred.
- 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 complete measurement and physical retrieval model. Include calibration, averaging, source geometry, spectral response and relevant transfer or flow effects when local weights and signal factors cannot establish the desired atmospheric quantity.
References
Similar or alternative tools
- Radar Nyquist Velocity Interval
Calculate a supplied single-PRF Doppler Nyquist velocity interval.
- Lidar Range Squared Factor
Apply a supplied squared-range correction to a lidar signal.