Description
Calculate a seismic arrival's signed residual from a supplied prediction.
Geophysical observations depend on acquisition geometry, sample timing, component orientation, reference levels and calibration signs. Ideal travel-time depth and one-dimensional alias bounds describe supplied models rather than a complete subsurface inversion. A referenced signal or pseudodepth label needs its original physical convention.
Calculate a seismic arrival's signed residual from a supplied prediction.
When to use this tool
Use Seismic Arrival Time Residual when checking the stated local geophysical geometry, reference, sampling or calibration term.
How to use the tool and how it works
- Enter observedArrivalSeconds, predictedArrivalSeconds. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read residualSeconds. Use the output convention below.
Return observedArrivalSeconds-predictedArrivalSeconds as signed residualSeconds.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| observedArrivalSeconds | Observed Arrival Seconds | Required. Finite number. |
| predictedArrivalSeconds | Predicted Arrival Seconds | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| residualSeconds | Residual Seconds | Required. Finite number. |
{
"input": {
"observedArrivalSeconds": 12.5,
"predictedArrivalSeconds": 12
},
"output": {
"residualSeconds": 0.5
}
}Limitations and assumptions
- Arrival definitions and a common clock are supplied; no seismic detection, model fitting or uncertainty assessment is performed.
- 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 calibrated acquisition records and an appropriate complete wavefield, geological or instrument model for physical inference and safe field operations.
References
Similar or alternative tools
- Seismic Pick Uncertainty Window Width
Measure the width of a supplied seismic-pick uncertainty window.
- Seismic Trace Muted Sample Flag
Check whether a sample falls inside a supplied seismic mute interval.