as.gmt: Converting between several time standards

In moonsun: Basic astronomical calculations with R

Description

These functions are used for converting between astronomical and sidereal times.

Usage

as.gmt(x, jday = jd(), lambda = getOption("longitude"), ...)
as.gst(x, jday = jd(), lambda = getOption("longitude"), ...)
as.lst(x, lambda = getOption("longitude"), ...)
as.lt(x, ...)

Arguments

x	an object of class gmt (Greenwich Mean Time), gst (Greenwich Sidereal Time), lst (Local Sidereal Time) or lt (Local Time)
jday	Julian Day Number (default for today)
lambda	Longitude of observer (default taken from options)
...	Additional arguments

Value

A converted object of appropriate class.

Author(s)

Lukasz Komsta

Examples

l=lt(length=10)
as.gst(l)
as.lst(l)
as.gmt(l)
as.lt(as.gst(as.gmt(l)))

Example output

          time
1   9h 33m 37s
2  10h 33m 37s
3  11h 33m 37s
4  12h 33m 37s
5  13h 33m 37s
6  14h 33m 37s
7  15h 33m 37s
8  16h 33m 37s
9  17h 33m 37s
10 18h 33m 37s
          time
1   9h 33m 37s
2  10h 33m 37s
3  11h 33m 37s
4  12h 33m 37s
5  13h 33m 37s
6  14h 33m 37s
7  15h 33m 37s
8  16h 33m 37s
9  17h 33m 37s
10 18h 33m 37s
          time
1   9h 33m 37s
2  10h 33m 37s
3  11h 33m 37s
4  12h 33m 37s
5  13h 33m 37s
6  14h 33m 37s
7  15h 33m 37s
8  16h 33m 37s
9  17h 33m 37s
10 18h 33m 37s
          time
1   7h 26m 24s
2   8h 26m 34s
3   9h 26m 44s
4  10h 26m 54s
5  11h 27m  4s
6  12h 27m 14s
7  13h 27m 23s
8  14h 27m 33s
9  15h 27m 43s
10 16h 27m 53s

moonsun documentation built on May 29, 2017, 12:17 p.m.