Who Needs Guiding.....


Ray Gralak
 

Hi Barry,

I am glad the Declination Arc tracking feature is working so well for you. Thanks for posting!

-Ray

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Barry Megdal
Sent: Friday, March 19, 2021 9:29 PM
To: main@ap-gto.groups.io
Subject: [ap-gto] Who Needs Guiding.....

I know others have had good luck with unguided imaging, but we just got the first clear and stable night in Southern
California in what seems like months, so I was able to try out my latest APPM model, using Ray's experimental
"declination arc" feature and hundreds of mapped points.

Seeing was a bit under 2 arcseconds, which unfortunately is good for my location. AP1600 mount with encoders,
and a very long and bendy AP206 scope. Most 10 minute subs never had a single guiding correction. Ray
deserves a lot of credit for APPM being able to model a difficult scope so well across the sky.

Typical Maxim guiding graph looked like this (and I think most of the variation was still due to less than excellent
seeing):





- Barry


Dr. Barry Megdal

Shb Instruments, Inc.
19215 Parthenia St. Suite A
Northridge, CA 91324
www.shbinstruments.com
(818) 773-2000 (818)773-2005 fax
bmegdal@shbinstruments.com

Faculty (retired)
Dept. of Electrical Engineering
Caltech


Barry Megdal
 

I know others have had good luck with unguided imaging, but we just got the first clear and stable night in Southern California in what seems like months, so I was able to try out my latest APPM model, using Ray's experimental "declination arc" feature and hundreds of mapped points.

Seeing was a bit under 2 arcseconds, which unfortunately is good for my location.  AP1600 mount with encoders, and a very long and bendy AP206 scope.  Most 10 minute subs never had a single guiding correction.  Ray deserves a lot of credit for APPM being able to model a difficult scope so well across the sky.

Typical Maxim guiding graph looked like this (and I think most of the variation was still due to less than excellent seeing):




- Barry


Dr. Barry Megdal

Shb Instruments, Inc.
19215 Parthenia St.  Suite A
Northridge, CA 91324
www.shbinstruments.com 
(818) 773-2000  (818)773-2005 fax
bmegdal@... 
 
Faculty (retired)
Dept. of Electrical Engineering
Caltech