Golden Hour Duration By Latitude Lookup
Explicittoy eveninggolden−4…+6°Sunwindowgeometricdurationfromactualindependentdeclination/latitude,not universalaestheticdefinitionor live ephemeris. Actual independent model/unit/frame/epoch/calibration and applicable measurement established;not precise ephemeris,forecast,geodesy operation,identity or safety approval.
Description
Golden-hour definitions vary by photographic convention.
Golden-hour definitions vary by photographic convention.1
This tool uses a declared evening solar-altitude window from +6 to −4 degrees and supplied geometric declination, without calculating a dated local schedule.
When to use Golden Hour Duration By Latitude Lookup
Use this tool to apply the stated golden hour duration by latitude lookup operation with an explicit input and unit basis.
How to use Golden Hour Duration By Latitude Lookup and how it works
- Establish the measurement basis and units described above.
- Enter actualLatitudeDegrees, callerIndependentSolarDeclinationDegrees and run the tool.
- Read result.declaredEveningWindowMinutes, result.condition 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 |
|---|---|---|---|
| actualLatitudeDegrees | Latitude Degrees. Units, ordering and applicable branch are specified in the algorithm. | number | required; finite; further conditions in the algorithm |
| callerIndependentSolarDeclinationDegrees | Solar Declination Degrees. Units, ordering and applicable branch are specified in the algorithm. | number | required; finite; further conditions in the algorithm |
Calculate hour-angle boundaries at +6 and −4 degrees using nonpolar latitude and declination. If both are crossing, multiply their increasing evening angle difference by four minutes per degree; otherwise return zero with one-or-both-boundaries-not-crossed, not a measured zero-duration event.
eveningWindowMinutes = 4 × (H at −4° − H at +6°), only when both boundaries cross Apply the declared units, ordering and branch conditions.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the declared output fields. | object |
| result.declaredEveningWindowMinutes | Ideal elapsed minutes when both boundaries cross; zero is a sentinel otherwise. | number |
| result.condition | Branch label describing geometric crossing or noncrossing, as explained in the algorithm. | string |
{
"input": {
"actualLatitudeDegrees": 0,
"callerIndependentSolarDeclinationDegrees": 0
},
"output": {
"result": {
"declaredEveningWindowMinutes": 40,
"condition": "both-boundaries-cross"
}
}
}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 returned boolean, signed difference or tied result follows the stated convention; an input error instead means the required input contract was not satisfied. Very large inputs or outputs may be rejected by shared resource limits.
Alternative or Complementary methods
For a related operation, use Blue Hour Duration By Latitude Lookup. Blue-hour definitions depend on the chosen solar-altitude interval.
For a related operation, use Civil Twilight End Hour Angle. Civil twilight conventionally uses the solar center six degrees below a geometric horizon.
References
-
Golden Hour Duration By Latitude Lookup — tool.io
Similar or alternative tools
- Blue Hour Duration By Latitude Lookup
Blue-hour definitions depend on the chosen solar-altitude interval.
- Civil Twilight End Hour Angle
Civil twilight conventionally uses the solar center six degrees below a geometric horizon.