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)
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(NightDay)
Loading required package: maps
# maps v3.1: updated 'world': all lakes moved to separate new #
# 'lakes' database. Type '?world' or 'news(package="maps")'. #
> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/NightDay/NightDay.Rd_%03d_medium.png", width=480, height=480)
> ### Name: NightDay
> ### Title: Night and Day Boundary Computation Function
> ### Aliases: NightDay
>
> ### ** Examples
>
> Time <- Sys.time()
> timezone <- 1
>
> NightDay(Time, timezone)
$Time
[1] "2016-07-04 21:01:01 JST"
$tz
[1] 1
$Latitude
[1] -67 -67 -67 -67 -67 -67 -67 -67 -67 -67 -67 -67 -67 -67 -67 -66 -66 -66
[19] -66 -66 -66 -66 -65 -65 -65 -65 -65 -65 -64 -64 -64 -64 -63 -63 -63 -63
[37] -62 -62 -62 -61 -61 -61 -60 -60 -59 -59 -58 -58 -57 -57 -56 -56 -55 -54
[55] -54 -53 -52 -52 -51 -50 -49 -48 -47 -46 -45 -44 -43 -42 -40 -39 -38 -36
[73] -35 -33 -32 -30 -28 -26 -24 -22 -20 -18 -16 -14 -12 -9 -7 -5 -2 0
[91] 2 5 7 9 12 14 16 18 20 22 24 26 28 30 32 33 35 36
[109] 38 39 40 42 43 44 45 46 47 48 49 50 51 52 52 53 54 54
[127] 55 56 56 57 57 58 58 59 59 60 60 61 61 61 62 62 62 63
[145] 63 63 63 64 64 64 64 65 65 65 65 65 65 66 66 66 66 66
[163] 66 66 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67
[181] 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 66 66 66
[199] 66 66 66 66 65 65 65 65 65 65 64 64 64 64 63 63 63 63
[217] 62 62 62 61 61 61 60 60 59 59 58 58 57 57 56 56 55 54
[235] 54 53 52 52 51 50 49 48 47 46 45 44 43 42 40 39 38 36
[253] 35 33 32 30 28 26 24 22 20 18 16 14 12 9 7 5 2 0
[271] -2 -5 -7 -9 -12 -14 -16 -18 -20 -22 -24 -26 -28 -30 -32 -33 -35 -36
[289] -38 -39 -40 -42 -43 -44 -45 -46 -47 -48 -49 -50 -51 -52 -52 -53 -54 -54
[307] -55 -56 -56 -57 -57 -58 -58 -59 -59 -60 -60 -61 -61 -61 -62 -62 -62 -63
[325] -63 -63 -63 -64 -64 -64 -64 -65 -65 -65 -65 -65 -65 -66 -66 -66 -66 -66
[343] -66 -66 -67 -67 -67 -67 -67 -67 -67 -67 -67 -67 -67 -67 -67 -67 -67
$Declination
[1] 22.77939
$GHA
[1] 119.1378
attr(,"class")
[1] "NightDay"
>
>
>
>
>
> dev.off()
null device
1
>
providing 
.