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Full Discussion: convert Julian date to calender date
Top Forums Shell Programming and Scripting convert Julian date to calender date Post 302116654 by jim mcnamara on Monday 7th of May 2007 11:10:19 AM
Old 05-07-2007
try:
Code:
#!/bin/ksh

date_from_yday()
{
	perl -e '
	  use Time::Local;

      $yr = $ARGV[0] - 1900;
      $yday = $ARGV[1];
	  $mytime = timelocal(1,0,0,1,0,$yr);
	  $mytime += ( 86400 * $yday );

      ($sec,$min,$hour,$day,$mon,$yr,$wday,$yday,$whocares) = 
            localtime($mytime);
      $yr += 1900;
      printf("%02d/%02d/%d\n", $day, $mon, $yr);

	' $2  $1
}

date_from_yday 75  2007

 

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LEARN ABOUT V7

getdate

GETDATE(1)							   User Commands							GETDATE(1)

NAME

       getdate - AME

SYNOPSIS

       [-dv][-n dec][-f format] [ra dec sys] itype2otype [date and/or time]

DESCRIPTION

       Convert date and time between various formats

	      [-dv][-n dec][-f format] itype2otype @file

	      itype: nfd=ISOFITS fd=FITS, dt=yyyy.mmdd, hr=hh:mm:ss, deg=dd:mm:ss

	      jd=Julian  Date,	mjd=Modified Julian Date hjd=Heliocentric Julian Date, mhjd=Modified HJD ep=epoch, epj=Julian epoch, epb=Besselian
	      epoch lt=local time, ut=UT, ts=seconds since 1950-01-01 now=current time, ang=fractional degrees

	      otype: fd=FITS, dt=yyyy.mmdd, jd=Julian Date, mjd=Modified Julian Date

	      hjd=Heliocentric Julian Date, mhjd=Modified HJD  hr=hh:mm:ss,  deg=dd:mm:ss,  ang=fractional  degrees  ep=epoch,	epj=Julian  epoch,
	      epb=Besselian epoch ts=seconds since 1950-01-01, tsu=Unix sec, tsi=IRAF sec gst=Greenwich Sidereal Time, lst=Local Sidereal Time

	      @file: First one or two columns are in itype format ra dec sys:  Need for Heliocentric conversions

       -a: Append date to input file, if there is one

       -d: Print date without time

       -e: Print output as ET/TDT/TT converting from UT

       -f: Format for output number (C printf)

       -h hours: Longitude in hours, west positive

       -l degrees: Longitude in degrees, west positive

       -n: Number of decimal places in sec, epoch, JD

       -t: Print time without date

       -v: Verbose

getdate 3.8.4							     June 2012								GETDATE(1)
All times are GMT -4. The time now is 02:51 AM.
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