PixInsight Forum (historical)

PixInsight => General => Topic started by: ballyhoo on 2019 November 29 17:41:21

Title: PCC not able to plate solve.
Post by: ballyhoo on 2019 November 29 17:41:21

Hello, I am getting the same error I would get in star alignment / unable to get putative stars. Trouble is there are not that many adjustments I can make in PCC. I changed the slide in log sensitive to the max on left and increased noise detection but still cannot get a plate solve. any suggestions?

I was able to plate solve my image of IC 405,  but not of M33.

Thank you!

Title: Re: PCC not able to plate solve.
Post by: Mybluox on 2019 November 29 18:10:20

Quote from: ballyhoo on 2019 November 29 17:41:21

Hello, I am getting the same error I would get in star alignment / unable to get putative stars. Trouble is there are not that many adjustments I can make in PCC. I changed the slide in log sensitive to the max on left and increased noise detection but still cannot get a plate solve. any suggestions?

I was able to plate solve my image of IC 405,  but not of M33.

Thank you!

Ballyhoo,
Try putting plate solving to automatic catalog, automatic limit magnitude, uncheck distortion correction, check force plate solving.
In advance plate solving put it back to default. log sensitivity -1.00, noise reduction to 0, Spline smoothing to 0.025
Rerun and see if that works.

Jeff

Title: Re: PCC not able to plate solve.
Post by: ballyhoo on 2019 November 29 19:34:21

well nothing I could do could get this to plate solve but here is a link to the image. Maybe you can get it to work?

https://www.dropbox.com/s/upw2zdsu72xt8zs/integration.xisf?dl=0

Title: Re: PCC not able to plate solve.
Post by: pfile on 2019 November 29 20:30:10

i wasn't able to get this to directly solve with PCC, but if you run the ImageSolver script and set the resolution (pixel scale) to 1, it will solve. with the WCS coordinates now in the image, PCC will run OK without making any changes to the PCC interface.

so, something is wrong with the image metadata - this doesn't look like a 400mm telescope + 4.6um pixels; the field of view is too small for that. what kind of camera are you using?

also i would do DBE to this image before runnign PCC, the gradient is pretty bad.

rob

Title: Re: PCC not able to plate solve.
Post by: ballyhoo on 2019 November 29 21:14:27

omg, that is the issue! I missed that. it is 666 FL data (951 reduced with .7)

Will try again. thank you!

Title: Re: PCC not able to plate solve.
Post by: stevek on 2019 November 30 03:00:49

In my experience, FWIW, every single issue I have ever had with PCC was down to setting the scale and FL properly.  Remember that if you bin, you have to double the pixel size.  If you have a reducer then you have to factor that too.

I never bother with the image metadata.  I just search for my object in the search button and get the coordinates into the tool that way.