Re-invoke platesolve

Sequence Generator Plate Solving
1

I use Platesolving for most of my astrophotography. I have no problem getting platesolve to correctly solve. I also use PHD2 for autoguiding with no problems.
My question is…
Is there a way to re-invoke platesolve during a sequence? If not, is there a way to invoke platesolve when changing events i.e. going from Event 1 to Event 2.
I am asking because over a long imaging session my image may drift … and I would like to re-center.
Roger

1 Like
2

In PHD2 under the Advanced Settings /Global tab there are some settings for changing dither mode and scale.

Not certain but I think I am probably using the PHD2 install defaults (random mode and scale 1.0). If you are seeing a very significant drift as opposed to modest random movement about the start position then maybe these options could be set more optimally.

I don’t know the theory but I guess exposure length, dither frequency, field of view and image scale could all have a bearing on amount of drift over 2-3 hours of imaging.

Maybe something for which someone could produce a simulator if we knew the PHD2 algorithms!

Mike

PS: And you are definitely seeing significant lateral image drift as opposed to field rotation?

3

Mike

Probably field rotation. PHD2 has been working well.

Roger

4

You can do this by making copy of the target and define Event 2 in the target copy.

5

Thanks. That would probably work.

Roger