Feature Tracking Displacement Rate Calculator
Observedfeaturedisplacementrate m/day,not automaticallyiceparcelvelocity or resolved2Dgeometricregistration. Actual independent units,calibration,measurement definitions/coverage and model applicability;not a climate forecast,causal determination,geodesy operation or safe travel/design approval.
Description
Feature tracking records displacement between matched observations over an elapsed interval.
Feature tracking records displacement between matched observations over an elapsed interval.1
A tracked feature's motion needs additional evidence before being interpreted as an ice parcel's velocity.
When to use Feature Tracking Displacement Rate Calculator
Use this tool to apply the stated feature tracking displacement rate calculator operation with an explicit input and unit basis.
How to use Feature Tracking Displacement Rate Calculator and how it works
- Establish the measurement basis and units described above.
- Enter actualIndependentlyTrackedFeatureDisplacementMeters, actualMatchedElapsedDays and run the tool.
- Read result.value using the output meanings below.
- If input is rejected, correct the stated type, range, ordering or alignment issue and rerun; review successful results under the declared convention.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualIndependentlyTrackedFeatureDisplacementMeters | Independently tracked feature displacement meters, on the basis specified in the algorithm. | number | required; finite; further conditions in the algorithm |
| actualMatchedElapsedDays | Matched elapsed days, on the basis specified in the algorithm. | number | required; finite; strictly positive; further conditions in the algorithm |
Require positive elapsed days and finite signed displacement in meters. Divide displacement by elapsed days.
rate meters/day = displacement meters / days Apply the declared units, ordering and branch conditions.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the declared output fields. | object |
| result.value | Signed feature displacement rate in meters per day. | number |
{
"input": {
"actualIndependentlyTrackedFeatureDisplacementMeters": 10,
"actualMatchedElapsedDays": 2
},
"output": {
"result": {
"value": 5
}
}
}Limitations and assumptions
The output applies the declared operation to the values you supply. Establish the measurement basis, units, coefficients and any caller-selected rules before interpreting it. The tool does not independently collect or verify observations or decide whether a model or reference applies.
Supply explicit required fields with the documented types and dense aligned arrays. Unknown fields, wrong types and nonfinite numbers are rejected. Branch-specific constraints are explained above. A successful false boolean, negative signed difference, empty slice or unresolved tie is distinct from an input error. Very large inputs or outputs may be rejected by shared resource limits.
Alternative or Complementary methods
For a related operation, use Station Component Velocity Vector Calculator. Surveyed east, north and up velocities can be combined into horizontal and total speed magnitudes.
For a related operation, use LOS to Horizontal Velocity Decomposition Calculator. Two independent line-of-sight observations can resolve two horizontal velocity components once vertical contributions have been removed.
References
Similar or alternative tools
- Station Component Velocity Vector Calculator
Surveyed east, north and up velocities can be combined into horizontal and total speed magnitudes.
- LOS to Horizontal Velocity Decomposition Calculator
Two independent line-of-sight observations can resolve two horizontal velocity components once vertical contributions have been removed.