Re:Disk Set 20: dates and times

[Michael Sallman <msallman@pro-ns.net>]

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.
>