Re: [TASS] CVS and Mark III vs Mark IV code

[Tom Droege <droege@WWA.COM>]

Is anyone still trying to run their Mark IIIs?  I will not feel bad if you
are not.  I suppose that Nick is still running?

Seems to me that you can just freeze the Mark III code where it is.

OK, I would be delighted if some of you continued to run the Mark IIIs.
They actually make a great display for an observatory.  With the code I
ran, one got a continuous display of a strip of sky that just scrolled up
the face of the CRT.

To those that keep asking what they can do, Mike points out a nice problem.
 Work on the distortion of the sky from the "large" v ewing angle of the
Mark IV.  Note that there is plenty of data for you to use to work on this
problem.  I just (today) shipped off 16 CD ROMs of data to Glenn.  I have
another set to loan anyone that wants to work on such things.

Note that there is the sky distortion assuming the optics is perfect.  On
top of that is whatever optical distortion there is, and then there is the
position distortion introduced by fitting a PSF to a star distorted by
coma.  I am sure there are other errors to sort out.  But you don't have to
have a Mark IV to work on the problems.  Data will be forthcoming.

Tom Droege

At 12:19 PM 12/10/99 -0500, you wrote:
>This brings up the interesting question of how we want to handle Mark III to
>Mark IV migration of the code.  Most of the code Glenn posted was the same
>code used in the Mark III version of star with minor modifications to make
>it compile under gcc.  Do we want to keep both versions of the code in sync
>or do we split the two off in different directions?
>
>There are some simplifying assumptions that were made in the Mark III code
>that still exist in Glenn's code that are no longer appropriate.  The
>biggest assumption is that RA and Dec are rectilinear coordinates.  That was
>