TIME2JDOFF Name
TIME2JDOFF Purpose
Find Julian day and offset from seconds. JS, Timeaxis
Category
Calling Sequence
time2jdoff, t Inputs
t = start time or array of times in seconds. in
Time is in seconds after a reference time.
Reference time may be specified with the
REFERENCE keyword. Default is Julian Seconds,
which are seconds after 0:00 Jan 1, 2000.
Keyword Parameters
Keywords
JD=jd returned Julian Day for 0:00 of the day of
or just before start time in t.
OFF=off returned offset in seconds which is to be
subtracted from t to put in in the range 0 to midnight.
REFERENCE=ref = date/time string (like "12:00 1 jan 1970")
which is the zero point for time t. If not given this
refernce time is assumed to be 0:00 1 Jan, 2000.
Outputs
Common Blocks
Notes
Notes: This routine is needed because IDL stores !x.crange
only in single precision, not good enough for time
intervals in seconds far from the zero time. This gives
the values needed by the timeaxis routine:
time2jdoff, t, jd=jd, off=off, ref="1 jan, 1970"
plot,t-off, y, xstyle=5
timeaxis, jd=jd
Modification History
R. Sterner, 18 Aug, 1993
Copyright (C) 1993, Johns Hopkins University/Applied Physics Laboratory
This software may be used, copied, or redistributed as long as it is not
sold and this copyright notice is reproduced on each copy made. This
routine is provided as is without any express or implied warranties
whatsoever. Other limitations apply as described in the file disclaimer.txt.