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Date conversion functions

All inputs for these functions and procedures can be arrays!

julian(year$<$_integer$>$,month$<$_integer$>$,day$<$_real$>$)

Function; returns Julian day including fraction. Day can be fractional. Example: print,julian(1998,12,16.2)
jd2date,jdf$<$_real$>$,year,month,day
Procedure; returns year, month, and day (including fraction) for input (fractional) Julian date.
by2jd(year$<$_real$>$)
Function; returns Julian date corrresponding to input Besselian year.
jy2jd(year$<$_real$>$)
Function; returns Julian date for input Julian year.
jd2jy(jd$<$_real$>$)
Function; returns Julian year for input Julian date.
jd2by(jd$<$_real$>$)
Function; returns Besselian year for input Julian date.



Christian Hummel 2009-10-20