LOS to Horizontal Velocity Decomposition Calculator
Twoactualindependentlookhorizontal2×2LOSdecomposition,verticalcomponent independentlyremoved,not solve2componentsfromoneLOS;no geodeticframeconversion. Actual independent units,calibration,measurement definitions/coverage and model applicability;not a climate forecast,causal determination,geodesy operation or safe travel/design approval.
Description
Two independent line-of-sight observations can resolve two horizontal velocity components once vertical contributions have been removed.
Two independent line-of-sight observations can resolve two horizontal velocity components once vertical contributions have been removed.1
The projection rows define the matching horizontal geometry.
When to use LOS to Horizontal Velocity Decomposition Calculator
Use this tool to apply the stated los to horizontal velocity decomposition calculator operation with an explicit input and unit basis.
How to use LOS to Horizontal Velocity Decomposition Calculator and how it works
- Establish the measurement basis and units described above.
- Enter actualMatchedLosVelocities, callerHorizontalProjectionRows and run the tool.
- Read result.eastVelocity, result.northVelocity 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 |
|---|---|---|---|
| actualMatchedLosVelocities | Two line-of-sight velocities aligned with projection rows, with vertical contributions already removed. | array of number | required; dense; align related rows as specified; further conditions in the algorithm |
| callerHorizontalProjectionRows | Two rows [east projection,north projection] defining an invertible 2×2 geometry. | array of array of number | required; dense; align related rows as specified; further conditions in the algorithm |
Require a 2×2 projection matrix, two observations and determinant magnitude at least 1e−8. Solve by the explicit two-equation inverse to return east and north velocities.
[east,north] = inverse(projection matrix) × LOS velocities Apply the declared units, ordering and branch conditions.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the declared output fields. | object |
| result.eastVelocity | Solved signed east velocity in the input LOS velocity unit. | number |
| result.northVelocity | Solved signed north velocity in the same unit. | number |
{
"input": {
"actualMatchedLosVelocities": [
1,
2
],
"callerHorizontalProjectionRows": [
[
1,
0
],
[
0,
1
]
]
},
"output": {
"result": {
"eastVelocity": 1,
"northVelocity": 2
}
}
}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 Feature Tracking Displacement Rate Calculator. Feature tracking records displacement between matched observations over an elapsed interval.
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.
- Feature Tracking Displacement Rate Calculator
Feature tracking records displacement between matched observations over an elapsed interval.