sun.rise.set: Calculates the time of sunrise and sunset
Description
Calculates the time of sunrise and sunset based on latitude and date.
Usage
sun.rise.set(datetimes, lat)
Value
A 2-column data frame, first column sunrise, second column sunset, as POSIXct format in standard time.
Value is NA when there is no defined sunrise or sunset for that day (winter/summer at high and low latitudes).
Arguments
datetimes
Vector of dates as POSIXct or POSIXlt (see DateTimeClasses) format
lat
Single latitude value of site. South should be negative, north positive
Author
Luke A. Winslow
References
Iqbal, Muhammad. 1983. An Introduction to Solar Radiation. Elsevier.