Cosine of Solar Zenith Angle — cos_solar_zenith

Calculates the cosine of the solar zenith angle based on the given parameters. This angle is crucial in determining the amount of solar radiation reaching a point on Earth.

Usage

cos_solar_zenith_angle(doy, lat, lon, dt, hr)

Arguments

doy: Day of year. Integer representing the day of the year (1-365).
lat: Latitude in degrees. Positive for the Northern Hemisphere and negative for the Southern Hemisphere.
lon: Longitude in degrees. Positive for East and negative for West.
dt: Time interval in seconds. Represents the duration over which the measurement is averaged or integrated.
hr: Hour of the day (0-23). Specifies the specific hour for which the calculation is made.

Value

Numeric value representing the cosine of the solar zenith angle.

Details

For explanations of formulae, see https://web.archive.org/web/20180307133425/http://www.itacanet.org/the-sun-as-a-source-of-energy/part-3-calculating-solar-angles/

References

"Understanding Solar Position and Solar Radiation" - RAMMB: [Link](https://rammb.cira.colostate.edu/wmovl/vrl/tutorials/euromet/courses/english/nwp/n5720/n5720005.htm)

Author

Alexey Shiklomanov

Examples

cos_solar_zenith_angle(doy = 150, lat = 45, lon = -93, dt = 3600, hr = 12)
#> [1] 0.3198601