Re: Problems with JULDAY and CALDAT

["John J. Boia" <jboia(at)iasdev1.gsfc.nasa.gov>]

Wayne, thanks for the references.  Will have a look.

I checked JULDAY just like your example and got different results
from what you got!

IDL> print,julday(4,7,1999,0)
% Compiled module: JULDAY.
       2451276.0
IDL> print,julday(4,7,1999,12)
       2451276.5
IDL> print, !version
{ mipseb IRIX unix 5.0.2 Aug 19 1997}


Wayne Landsman wrote:
> 
> >JULDAY seems to return Julian date values with an offset
> >of 0.5 from the accepted definition, when hours, minutes,
> >and seconds are passed in as arguments  Integer julian
> >day numbers correspond to 12:00 noon UT.
> 
> I'm not sure what you are referring to here -- I don't see any problems with
> JULDAY.   JULDAY should return an integer value when the hour is 12:00 noon --
> which it does.
> 
> IDL> print,julday(4,7,1999,0)
>        2451275.5
> IDL> print,julday(4,7,1999,12)
>        2451276.0
> 
> --Wayne Landsman                              landsman@mpb.gsfc.nasa.gov

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John J. Boia            | Email: jboia@iasdev1.gsfc.nasa.gov
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