| NightDay {NightDay} | R Documentation |
Night and Day Boundary Computation Function
Description
Calculates the declination of the sun, the greenwhich hour angle and the latitudes of the of the sun movements throughout one day.
Usage
NightDay(time, timezone)
Arguments
time |
needs to be of following format: %Y-%m-%d (%Y Year with century, %m Month as decimal number (01-12), %d Day of the month as decimal number (01-31)), %H:%M:%S (%H Hours as decimal number (00-23), %M Minute as decimal number (00-59), %S Second as decimal number (00-61) |
timezone |
has to be an integer, e.g. a number between -11 and +11 (0 for GMT, +1 for CMT, etc.) |
Value
Time |
is an object of class 'POSIXlt' representing the input time. |
tz |
is an integer representing the input timezone |
Latitude |
is a vector fo doubles containing the Latitudes of the night and day boundary. |
Declination |
returns a double of the sun declination. |
GHA |
returns a double of the greenwhich hour angle. |
Note
The function NightDay can be used in combination with your own maps and plot functions.
Author(s)
Max Hughes-Brandl
Examples
Time <- Sys.time()
timezone <- 1
NightDay(Time, timezone)