NightDay (version 1.0.1.1)

NightDay: 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.

Examples

# NOT RUN {
Time <- Sys.time()
timezone <- 1

NightDay(Time, timezone)
# }