GPR Reflection Amplitude Feature Tool
Screen caller selected GPR reflection/noise amplitude windows using RMS SNR; assumes matched gain/processing and does not identify feature material, burial or archaeological origin.
Description
GPR reflection screening compares signal-window amplitude with measured noise.
GPR reflection screening compares signal-window amplitude with measured noise. RMS amplitude measures an entire window and avoids depending on a single signed peak.1
Screen caller selected GPR reflection/noise amplitude windows using RMS SNR; assumes matched gain/processing and does not identify feature material, burial or archaeological origin.
When to use GPR Reflection Amplitude Feature Tool
Use this tool to screen caller selected GPR reflection/noise amplitude windows using RMS SNR; assumes matched gain/processing and does not identify feature material, burial or archaeological origin.
Prepare the artifact, site or survey measurements and any independently established calibration or model choices. Keep paired observations aligned and confirm units and coordinate conventions.
How to use GPR Reflection Amplitude Feature Tool and understand its results
- Prepare the artifact, site or survey measurements and any independently established calibration or model choices. Keep paired observations aligned and confirm units and coordinate conventions.
- Enter reflectionAmplitudeSamples, noiseAmplitudeSamples, callerMinimumAmplitudeSnr using the field table and calculation rules, then run the tool.
- Read reflectionRmsAmplitude, noiseRmsAmplitude, amplitudeSnr, aboveCallerFeatureThreshold. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| reflectionAmplitudeSamples | Reflection amplitude samples | list of number | Required |
| noiseAmplitudeSamples | Noise amplitude samples | list of number | Required |
| callerMinimumAmplitudeSnr | Caller minimum amplitude snr | number | Required |
Enter nonempty finite reflection and noise sample lists and a positive minimum amplitude SNR. Noise RMS must be positive; reflection RMS may be zero. Return both RMS values, their dimensionless ratio and an inclusive cutoff flag.
RMS = √mean(amplitude²); amplitudeSNR = reflectionRMS/noiseRMS Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| reflectionRmsAmplitude | Reflection rms amplitude | number |
| noiseRmsAmplitude | Noise rms amplitude | number |
| amplitudeSnr | Amplitude snr | number |
| aboveCallerFeatureThreshold | Above caller feature threshold | boolean |
{
"input": {
"reflectionAmplitudeSamples": [
-2,
2
],
"noiseAmplitudeSamples": [
-1,
1
],
"callerMinimumAmplitudeSnr": 2
},
"output": {
"reflectionRmsAmplitude": 2,
"noiseRmsAmplitude": 1,
"amplitudeSnr": 2,
"aboveCallerFeatureThreshold": true
}
}Limitations and assumptions
Windows must have matched gain and processing. The ratio is an amplitude ratio, not power SNR or decibels. It does not identify feature material, burial or archaeological origin.
Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Numeric lists are limited to 100,000 entries; the rules above may require smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors. A successfully returned false flag is an evaluated outcome; its meaning is explained above.
Alternative or Complementary methods
Use Magnetic Susceptibility Floor Anomaly Tool: Compare paired same-basis floor/background susceptibility with instrument offset and caller enhancement policy; signed differences remain and enhancement is not proof of burning or a buried floor. For a complementary task, use Soil Phosphorus Anomaly Test Tool: Standardize soil phosphorus against caller matched-method reference samples and apply a strict upper anomaly cutoff; anomalies do not independently establish occupation or human origin.
References
-
GPR Reflection Amplitude Feature Tool — tool.io
Similar or alternative tools
- Magnetic Susceptibility Floor Anomaly Tool
Compare paired same-basis floor/background susceptibility with instrument offset and caller enhancement policy; signed differences remain and enhancement is not proof of burning or a buried floor.
- Soil Phosphorus Anomaly Test Tool
Standardize soil phosphorus against caller matched-method reference samples and apply a strict upper anomaly cutoff; anomalies do not independently establish occupation or human origin.