zenith: Calculate the zenith angle.
In dslaw/clearskies: Clear Sky Models

Description Usage Arguments Details Value

Calculate the zenith angle.

1	zenith(dayofyear, year, tz, latitude, longitude, interval = 1L)

`dayofyear`	Numeric vector containing the day of year(s), for which the zenith angle should be calculated.
`year`	Numeric vector containing the year(s) for which the zenith angle sould be calculated.
`tz`	UTC Offset. Ex: Eastern Standard Time = -5.
`latitude`	Latitude of the location at which the zenith angle is to be calculated.
`longitude`	Longitude of the location at which the zenith angle is to be calculated.
`interval`	Number of minutes between zenith angle calculations. Defaults to (every minute). Must be an integer between 1 and 60, inclusive.

zenith is vectorized over both dayofyear and year, with the shorter vector being recycled as usual.

A single vector of the zenith angles at each interval throughout the specified time period (i.e. a vector of length (60 * 24 / interval) * number of days).

dslaw/clearskies documentation built on May 15, 2019, 4:21 p.m.