RE: Survey Strategy

["Creager, Robert S" <CreagRS@LOUISVILLE.STORTEK.COM>]

I believe I've signed up for #2 already.  It will be implemented with my
Perl Controller/Driver though...  Currently, I am working on moving during
the CCD to memory card transfer.

What is your field upgrade?  Since I have not place my Mark IV outside yet
(this month I will!), I have not 'fixed' the declination sprocket set screw
wiggle yet.  Should I wait on that?

> -----Original Message-----
> From: Tom Droege [mailto:tdroege2@earthlink.net]
> Sent: October 04, 2002 12:37 PM
> To: Robert Creager; tass@listserv.wwa.com
> Subject: Re: Survey Strategy
> 
> Rob and all,
> 
> Yes, Arne's scheme looks OK to me and he is the expert.  But the present
> Mark IVs will not do very well at it because they cannot point accurately
> in declination.
> 
> I have been worrying about this myself since I got TOM2 and TOM3 running
> and see how good the dec. drive is.  It is much worse than I thought.  So
> something needs to be done.
> 
> I have been designing a fix that could be put in place in the field.  I
> think it will work OK and get the pointing down to a few minutes in
> declination.
> 
> What will then be needed is software that is capable of doing a program
> such as described by Arne.  I think the particular sky map used is
> unimportant.  Probably we should all use the same one.  I think a 4 degree
> grid is just about right.  We get about 4.2 degrees of field and with a
> better dec. drive the .2 overlap should be enough.
> 
> Now that I have looked at a lot of data, I think it is important to point
> at exactly the same spot for each frame with a different epoch.  The data
> will not be as consistent if stars move around in position in the
> frame.  This just hides absolute accuracy, but that is life.  By matching
> position in frames we will do better in relative accuracy, and that is
> what
> is needed to detect variables.
> 
> OK, gang, here are the projects:
> 
> 1) Get a field kit out to upgrade the dec. pointing.
> 
> 2) Get table driven software out that will allow following a program such
> as that described by Arne in TN 48.
> 
> I will do 1)
> 
> Tom Droege
> 
> At 09:36 PM 10/3/02 -0600, you wrote:
> 
> >Just looking around in the Tech notes, and ran across
> >http://www.tass-survey.org/tass/technotes/tn0048.html from Arne.  This
> >still a good strategy?  Does anyone have a copy of "skymap.txt", as it
> >doesn't reside on Arne's FTP site any more...
> >
> >Thanks,
> >Rob