I believe its not a flex problem as its very consistent.

It's good that it is consistent, but it is possible that it is unmodeled flexure. The pointing terms best model a solid object with consistent flexure characteristics. When you have a large mirror on one end of the scope the flexure can be uneven as a whole across the scope.

That's what the dec-arc tracking is supposed to handle but the path that the hour-angle point creation strategy takes can introduce random flexures that are not there when doing a declination arc.

-Ray

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Rouz
Sent: Friday, August 20, 2021 1:08 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] #APCC - V1.9 Tracking Error

Here is another blink clip of the previous nights tracking with a model with less points.

I believe its not a flex problem as its very consistent.


https://www.dropbox.com/s/ke6l2foort7jpod/tracking%2018-Aug-21.wmv?dl=0