Rain Gauge Wind Undercatch Correction Percent Calculator
Independent wind-catch calibrated correction observed/efficiency and percent relative to observed, not constant rain gauge bias or weather inference. Caller independently establishes matching units, evidence, method edition and applicability; output is not compliance, diagnosis, work-safety approval, geological identity or validated hazard prediction.
Description
Wind undercatch occurs when a rain gauge captures less precipitation than the reference amount.
Wind undercatch occurs when a rain gauge captures less precipitation than the reference amount.1
A catch efficiency is the collected fraction of that reference and must come from an independently applicable calibration.
When to use Rain Gauge Wind Undercatch Correction Percent Calculator
Use this tool to calculate or review the supplied observations under the stated rules. Establish the observation method, units, averaging period and applicable reference or calibration.
How to use Rain Gauge Wind Undercatch Correction Percent Calculator and understand its results
- Establish the observation method, units, averaging period and applicable reference or calibration.
- Enter observedGaugeRainMm, independentCatchEfficiency, using the field meanings and rules below, then run the tool.
- Read correctedRainMm, correctionRelativeObservedPercent, using the output meanings and calculation rules below.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedGaugeRainMm | Observed gauge rain mm | number | Required |
| independentCatchEfficiency | Independent catch efficiency | number | Required |
Require observed gauge rain at least zero and catch efficiency greater than zero and at most one. Divide observed rainfall by efficiency and return the percentage increase implied by that factor. The percentage depends on efficiency even when the measured rain is zero.
correctedRain=observedRain/efficiency; correctionPercent=100(1/efficiency−1) Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| correctedRainMm | Corrected rain mm | number |
| correctionRelativeObservedPercent | Correction relative observed percent | number |
{
"input": {
"observedGaugeRainMm": 8,
"independentCatchEfficiency": 0.8
},
"output": {
"correctedRainMm": 10,
"correctionRelativeObservedPercent": 25
}
}Limitations and assumptions
The efficiency must be independently applicable to the gauge and event. This does not estimate it from wind, restore unobserved events or provide an uncertainty interval.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite.
Alternative or Complementary methods
For a related step, use Daily Clear Sky Insolation Estimate Calculator: Integrating irradiance over time gives radiant energy per area. For a complementary comparison, use Albedo Surface Type Table Lookup: Albedo is a reflected fraction defined for particular illumination and observation conditions.
References
Similar or alternative tools
- Daily Clear Sky Insolation Estimate Calculator
Integrating irradiance over time gives radiant energy per area.
- Albedo Surface Type Table Lookup
Albedo is a reflected fraction defined for particular illumination and observation conditions.