Lunar Laser Ranging Earth-Moon Distance cm Precision Note Generator
Two-way laser-ranging½ctconversion and independent time-only range error; atmosphere/reflector/systematic clock corrections independently supplied, not actual Lunar Laser Ranging precision guarantee. Caller independently establishes frames, units, epoch, covariance and instrument context; not an identity, association or astrometric quality certification.
Description
A laser round trip measures two-way propagation time.
A laser round trip measures two-way propagation time.1
Converting half that path to distance still depends on independently accounted propagation and measurement effects. Use Lunar Laser Ranging Earth-Moon Distance cm Precision Note Generator to evaluate the supplied inputs under the model explained below.
When to use Lunar Laser Ranging Earth-Moon Distance cm Precision Note Generator
Use Lunar Laser Ranging Earth-Moon Distance cm Precision Note Generator to evaluate the supplied inputs under the model explained below. Establish the units, measurement scope and model assumptions before entering values.
How to use Lunar Laser Ranging Earth-Moon Distance cm Precision Note Generator and understand its results
- Establish the units, measurement scope and model assumptions before entering values.
- Enter Observed round trip seconds, Caller path propagation speed meters per second, Independent round trip time sigma seconds using the field table and validation rules below, then run the tool.
- Read Conditional one way distance cm, Conditional range sigma cm; interpret the units, signs, ordering and unknown-value placeholders described below.
- Correct reported input errors and rerun. Apply successful results according to their specific meanings and check the assumptions before using them in a decision.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedRoundTripSeconds | Observed round trip seconds | number | Required; constraints below |
| callerPathPropagationSpeedMetersPerSecond | Caller path propagation speed meters per second | number | Required; constraints below |
| independentRoundTripTimeSigmaSeconds | Independent round trip time sigma seconds | number | Required; constraints below |
Enter nonnegative round-trip time and independent round-trip sigma in s and positive caller propagation speed in m/s. Multiply each time by speed×50 to convert half the path from m to cm. Zero times return zero. No atmospheric delay, reflector geometry, clock bias or speed uncertainty is propagated.
oneWayDistanceCm=roundTripSeconds×speed×50; rangeSigmaCm=timeSigma×speed×50 Use the field order, units and branch conditions described above.
| Output field | Meaning | Value type |
|---|---|---|
| conditionalOneWayDistanceCm | Conditional one way distance cm | number |
| conditionalRangeSigmaCm | Conditional range sigma cm | number |
{
"input": {
"observedRoundTripSeconds": 2,
"callerPathPropagationSpeedMetersPerSecond": 299792458,
"independentRoundTripTimeSigmaSeconds": 1e-10
},
"output": {
"conditionalOneWayDistanceCm": 29979245800,
"conditionalRangeSigmaCm": 1.4989622900000001
}
}Limitations and assumptions
Converting half that path to distance still depends on independently accounted propagation and measurement effects. Apply the exact scope and assumptions explained above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse arrays fail validation. Domain-specific bounds, alignments and supported tokens are explained above; extremely large inputs or outputs can also be rejected. Input errors differ from successful false results, empty match lists and unknown-evidence placeholders.
Alternative or Complementary methods
Use Mean Lunar Distance km Lookup for a related task: A lunar-distance reference depends on a statistic and observational context.
Use Speckle Interferometry Diffraction Limit lambda/D Resolution Check for a related task: The Rayleigh relation describes ideal circular-aperture angular resolution.
References
Similar or alternative tools
- Mean Lunar Distance km Lookup
A lunar-distance reference depends on a statistic and observational context.
- Speckle Interferometry Diffraction Limit lambda/D Resolution Check
The Rayleigh relation describes ideal circular-aperture angular resolution.