Examples
Examples
Try the starting example
- Latitude (degrees)
- 51.5
- Solar declination (degrees)
- 10
- Geometric daylight duration (hours)
- 13.707645
Try another scenario
- Latitude (degrees)
- 56.650000000000006
- Solar declination (degrees)
- 10
- Geometric daylight duration (hours)
- 14.07209
Calculation method
Calculation method
Geometric daylight duration (hours)
Hour-angle horizon geometry, solar centre altitude zero; polar conditions handled.
Symbols and units
- a
- Latitude (degrees)
- b
- Solar declination (degrees)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- No refraction, solar disc radius, terrain or civil twilight. Pole/equinox singularity excluded. Supported limits: All required fields must be finite values of the exact declared type and within displayed bounds. Lists contain1–1000 finite numbers. JSON tables are numeric rectangular rows, at most100 rows and30 columns; individual tools have stricter shape/domain constraints. No refraction, solar disc radius, terrain or civil twilight. Pole/equinox singularity excluded.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.