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AIX
convert date in lilian format for shell (AIX)
Post 57849 by Perderabo on Monday 8th of November 2004 04:16:34 PM
11-08-2004
According to a web site I found:
148138 = 1988-5-16
148139 = 5/17/1988
these are two examples of lilian dates from an IBM website.
Using ksh,
function lil { datecalc -j $(( $1 - 100841)) ; }
defines a function and then "lil 148138" results in "1988 5 16". This function depends on my datecalc script.
And you know where to get datecalc, since it is mentioned in the "Yesterdays Date/Date Arithmetic" article in our FAQ section which you certainly read before you posted your question.
This was an interesting question. I had never heard of lilian date format before. It looks like IBM went to a lot of trouble to re-invent the wheel. As far as I can see, the only difference between lilian date format and the standard mjd is, well, 100,841 days.
148138 = 1988-5-16
148139 = 5/17/1988
these are two examples of lilian dates from an IBM website.
Using ksh,
function lil { datecalc -j $(( $1 - 100841)) ; }
defines a function and then "lil 148138" results in "1988 5 16". This function depends on my datecalc script.
And you know where to get datecalc, since it is mentioned in the "Yesterdays Date/Date Arithmetic" article in our FAQ section which you certainly read before you posted your question.
This was an interesting question. I had never heard of lilian date format before. It looks like IBM went to a lot of trouble to re-invent the wheel. As far as I can see, the only difference between lilian date format and the standard mjd is, well, 100,841 days.
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LEARN ABOUT DEBIAN
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)