Re:Disk Set 20: dates and times

[Tom Droege <tdroege@veriomail.com>]

Mike, and all,

No, I did not change it.  I thought I remembered making this change, but it 
was not made.

Should I make it now?

I still hope to rescue all this data.  I do have records of the calendar 
day that I took the data and the time is always checked, so I should be 
able to straighten it out.

Tom Droege

At 08:51 PM 12/17/01 -0600, you wrote:
>Tom, Michael & all,
>
> >>The Julian Date corresponding to this time is 2,452,240.818.  Note
> >>that the file name has "2239818" instead of the expected "2240818".
> >>So that particular file (which comes from Disk 7 or 8) has a file
> >>name which is off by one day.
>
> >>                                   Michael Richmond
>
>It's also that way for Disk 20:
>hvra2246774.fits V        2452247.77412   99.8 object     72.6    7.0
>(from make_list.out)
>
>Tom, did you ever get a chance to test if the "fix" below solved this
>problem?
>
>Mike
>
>
>Michael Sallman wrote:
> >
> >
> >
> >   ------------------------------------------------------------------------
> >
> > Subject: Re: Notes on Disk Set 19
> > Date: Thu, 18 Oct 2001 18:18:21 -0500
> > From: Michael Sallman <msallman@pro-ns.net>
> > To: Tass <tass@listserv.wwa.com>
> > References: <4.2.2.20011015215827.00de0350@pop.veriomail.com>
> >
> > Tom,
> >
> > I just took a quick look at model.bas and noticed this:
> >
> > TilNow# = JulianDay# - 2451545.5#       ' Days since Jan 1, 2000
> > midnight
> >
> > If Jan 1, 2000 midnight is 1/1/2000 0h UT, I think it should be
> > 2451544.5.
> >
> > I haven't had a chance to test it out (though it does add the 1 day),
> > but I thought I'd at least mention it in case it's obvious to you (or
> > someone else) if this is the problem or not.
> >