Description
Subtract tideSignal from observedGravity for tideRemoved and add signed driftCorrection for corrected.
Potential-field calculations describe local gravity or magnetic adjustments and spectral operations. Sign, vertical direction, and wavenumber convention affect the result; a single factor does not produce a complete corrected survey.
Subtract tideSignal from observedGravity for tideRemoved and add signed driftCorrection for corrected.
When to use this tool
Use Gravity Tidal Supplied Correction Term when you need a local potential-field term with supplied coefficients or geometry.
How to use the tool and how it works
- Enter observedGravity, tideSignal, driftCorrection. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read tideRemoved, corrected. Use the output convention below.
Subtract tideSignal from observedGravity for tideRemoved and add signed driftCorrection for corrected.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| observedGravity | Observed Gravity | Required. Finite number. |
| tideSignal | Tide Signal | Required. Finite number. |
| driftCorrection | Drift Correction | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| tideRemoved | Tide Removed | Required. Finite number. |
| corrected | Corrected | Required. Finite number. |
{
"input": {
"observedGravity": 100,
"tideSignal": 0.2,
"driftCorrection": 0.1
},
"output": {
"tideRemoved": 99.8,
"corrected": 99.89999999999999
}
}Limitations and assumptions
- All terms use the same gravity unit; tide is subtracted while driftCorrection is an already signed additive correction, without calculating either physical model or a gravity anomaly.
- 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
Process the complete survey using the intended reference model and correction chain. Check spectral conventions, boundary handling, and input units rather than combining isolated terms without their model context.
References
Similar or alternative tools
- Gravity Freeair Height Correction Factor
Multiply heightMeters by gradientMgalPerMeter and add that correction to observedMgal.
- Gravity Datum Offset Contribution
Multiply suppliedDatumOffset by that scale, reverse sign when subtractOffset, and add the signed correction to observedGravity.