solartime: Obtain local solar time from clock time

In rforge/microclim: Microclimate predictions

Description

Calculates solar time at a given location, given the clock time

Usage

solartime(localtime, lat, lon, merid = 0, dst = 0, day)

Arguments

localtime	Local clock time, in hours from midnight
lat	Latitude, in degrees
lon	Longitude, in degrees
merid	Longitude of local standard time meridian, in degrees east from Greenwich. The default (0) corresponds to the Greenwich mean time meridian; for Central European time (most of Western Europe except UK, Eire and Portugal), use merid = 15.
dst	Local adjustment for summertime. For countries which advance their clocks in spring, this is 1 during the summer and 0 in winter.
day	Day of the year (1 to 365)

Value

Vector of local solar time, in hours from midnight.

Author(s)

Jon Bennie

Examples

day <- c(1:365)
soltime <- solartime(localtime=12, lat=52, lon=1, merid=0, dst=0, day=day)
plot(soltime ~ day, type="l") 	# Plot the equation of time

rforge/microclim documentation built on Feb. 21, 2022, 7:49 a.m.