dmjd2ut {astroFns} | R Documentation |
DMJD to UT
Description
Decimal modified Julian date to Universal time.
Usage
dmjd2ut(dmjd, tz='UTC')
Arguments
dmjd |
Time in decimal Modified Julian Date |
tz |
Time zone string |
Details
Calculation is always from UTC, but it is possible to correct to local time
zone with tz
(see Sys.timezone
). For instance, tz = 'EST5EDT'
converts to U.S. Eastern time, with EST or EDT based on the system's knowledge
of the date for switching between the two. Set the number of digits
after the decimal place for seconds, n
, with
options('digits.secs'=n)
.
Value
Time string with class POSIXct
Author(s)
Andrew Harris
See Also
ut2dmjd
, ymd2jd
,
strptime
, ISOdatetime
,
axis.POSIXct
for time in plot axes;
as.POSIXct
to recover time in plot from locator()
Examples
dmjd2ut(56951.54183613)
sd <- getOption('digits.secs')
dmjd2ut(ut2dmjd(2010, 1, 5, 2, 34, 17.8115))
options('digits.secs' = 3)
dmjd2ut(ut2dmjd(2015, 1, 5, 2, 34, 17.8115))
options('digits.secs' = sd)
dmjd2ut(ut2dmjd(2015, 1, 5, 2, 34, 17.8115), tz='CET')
dmjd2ut(ut2dmjd(2015, 8, 5, 2, 34, 17.8115), tz='CET')
dmjd2ut(ut2dmjd(2015, 1, 5, 2, 34, 17.8115), tz='EST5EDT')
dmjd2ut(ut2dmjd(2015, 8, 5, 2, 34, 17.8115), tz='EST5EDT')
dmjd2ut(ymd2jd(2001, 1, 1) - 2400000.5)
[Package astroFns version 4.2-1 Index]