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)

Arguments

Value

A 2-column matrix, first column sunrise, second column sunset, as POSIXct format. Value is NA when there is no defined sunrise or sunset for that day (winter/summer at high and low latitudes).

Author(s)

Luke A. Winslow

References

Iqbal, Muhammad. 1983. An Introduction to Solar Radiation. Elsevier.

See Also

is.night is.day

Examples

sun.rise.set(lat=40.75,datetimes=as.POSIXlt('2013-03-31'))

Results

R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> library(LakeMetabolizer)
Loading required package: rLakeAnalyzer
> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/LakeMetabolizer/sun.rise.set.Rd_%03d_medium.png", width=480, height=480)
> ### Name: sun.rise.set
> ### Title: Calculates the time of sunrise and sunset
> ### Aliases: sun.rise.set
> ### Keywords: methods
> 
> ### ** Examples
> 
> sun.rise.set(lat=40.75,datetimes=as.POSIXlt('2013-03-31'))
[1] "2013-03-31 05:46:41 JST" "2013-03-31 18:13:18 JST"
> 
> 
> 
> 
> 
> dev.off()
null device 
          1 
>