Hi,
Simon's message has reminded me of a broader question I intended to raise
earlier. I recently tried running one of Simon's great DeltaCAD programs in
DC7, and found it wouldn't work. So I tried a retained copy of DC6, and it
failed again. When I finally tried DC4, it worked like a treat. Thank you
Simon!
Have others had the same problem of incompatibility with DeltaCAD Basic
programs between versions of the CAD package? If so, what seems to cause the
problem(s)? Do we need to compile a list of 'how to convert' or at least insert
a comment in our programs indicating under which edition they were created?
best wishes,
Peter
Quoting "Simon [illustratingshadows" <[email protected]>:
> Also, my "analemma.bas" DeltaCAD program has options for the analemma on an
> equatorial dial, choice 2 allows the analemma to be on the dial plate or on
> the gnomon.
>
> Simon
>
> Simon Wheaton-Smith
> www.illustratingshadows.com
> Silver City, New Mexico W108.2 N32.75 and
> Phoenix, Arizona, W112.1 N33.5
>
> --- On Sun, 3/21/10, Brian Albinson <[email protected]> wrote:
>
>
> From: Brian Albinson <[email protected]>
> Subject: Re: Analemma for Equatorial Sundial
> To: "Ralf Jung" <[email protected]>, [email protected]
> Date: Sunday, March 21, 2010, 10:32 AM
>
>
>
>
>
> Ralf
>
> The equatorial gnomon analemma dimensions are a function only of the EoT and
> the dial radius. The longitudinal correction is obtained by rotating the
> dial hours.
>
> There are several ways of implementing analemmatic gnomons, I will send you
> privately an Excel program which does the calculation.
>
> Brian Albinson
> 3441 Wellington Crescent, North Vancouver
> BC, V7R 3B3
> Phone 604 980 3475
>
> ----- Original Message -----
> From: Ralf Jung
> To: [email protected]
> Sent: Sunday, March 21, 2010 8:23 AM
> Subject: Analemma for Equatorial Sundial
>
> dear sundial expert's,
>
> I want to build a equatorial sundial with a corrector on the gnomon. Like the
> one at Cosmos Observatory Lasstrop (there is a picture at
> http://www.fransmaes.nl/zonnewijzers/welcome-e.htm => Pole style:equatorial
> => armillary spheres netherlands). I read a view articles how to construct
> this kind of gnomon (e.g.
> http://www.mysundial.ca/tsp/analemmic_sundial.html). But still there is
> question which I can not answer. If I construct an analemma (12:00 UT) for
> the location (longitude 8° 44' E; latitude 48° 35' N) with the ephemeride
> from the U.S. Naval Observatory then this analemma is tilted to the right
> sight and not perpendicularly. What are the right numbers to calculate the
> gnomon-corrector (include longitude)?
> 1. y = declination; x = EOT + longitude (15°- 8° 44')*4
> 2. y = declination; x = azimuth from the ephemeride
> For clarification, my question is not about trigonometry.
>
> thanks
>
> ralf
>
>
>
>
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