zenith_angle: Zenith Angle

In TrenchR: Tools for Microclimate and Biophysical Ecology

Zenith Angle

Description

The function calculates the zenith angle, the location of the sun as an angle (in degrees) measured from vertical \insertCiteCampbell1998TrenchR.

Usage

zenith_angle(doy, lat, lon, hour, offset = NA)

Arguments

doy	numeric day of year (1-366). This can be obtained from standard date via day_of_year.
lat	numeric latitude (decimal degrees).
lon	numeric longitude (decimal degrees).
hour	numeric hour of the day (0-24).
offset	numeric the number of hours to add to UTC (Coordinated Universal Time) to get local time (improves accuracy but not always necessary). Optional. Defaults to NA.

Value

numeric zenith angle (degrees)

References

\insertAllCited

See Also

Other utility functions: airpressure_from_elev(), azimuth_angle(), day_of_year(), daylength(), dec_angle(), solar_noon(), temperature conversions

Examples

  zenith_angle(doy  = 112, 
               lat  = 47.61, 
               lon  = -122.33, 
               hour = 12)

TrenchR documentation built on Sept. 14, 2023, 1:07 a.m.