When plate solve fails - take new image rather than repeating failure.

[nickstarboy]

When slewing to a target, if the initial exposure is suboptimal (ie trailed due to wind) the platesolve fails, and then repeats the failure several more times (same input, same failure).

The whole process then fails - usually start s imaging at this probably wrong position.

Why not take a new image instead?

I use ASTAP.

[Stefan B]

Not entirely sure about the description.

The flow is:

Capture Image → Solve → On Failure Blind Solve → Capture new image and reattempt (when enabled)

So it will take a new exposure. (If not it is a bug)

[nickstarboy]

Oh OK! I have the plate solve 'number of attempts ' at 3 , if i set this to 1 will it take another image immediately? I have never known it take another image after failing. I just get the red box appear at lower right telling me its failed and then the auto focus window appears and it starts imaging.

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Is there another setting I need to alter?

[Ross Walker]

I may be wrong but I think you have it set up correctly already. My understanding is, setting “number of attempts” to 3 means the plate solve is run a max of three times, with each attempt using a newly captured image (not the same image). And if you set attempts to only one, you’ll just get a single platesolve attempt with no re-attempts on failure. Is my understanding correct Stefan? Nickstarboy, are you sure NINA is not capturing a new image each attempt? It would be pointless using the same image each attempt.

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[nickstarboy]

Hi Ross, I'm about 90% sure it doesnt take a new image, but I should check first before confirming.

[nickstarboy]

Happened again last night - acquired image was slightly trailed, so wouldnt solve, NINA gave me the red box of ‘platesolve failed’, and then tried again with the same image…..it didnt work!

[Stefan B]

It will try normal solve then fallback to blind solve. then a new image will be taken when you have more than 1 retry enabled.

[nickstarboy]

Ah OK, perhaps I also have blind solve set to ASTAP, so it seems like a straight repeat.

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I’ll check. Perhaps I was panicking unduly - i guess it only takes a minute or so to blind solve. Everything is so quick in NINA perhaps I was getting impatient!

Thanks Stefan.

[Ross Walker]

Nick, what is your delay between solves?

Are you confusing local and blind plate solves? If the local solve fails, it will use the same image when it attempts a blind solve. Is this what you are seeing? This should be expected behaviour.

Or is what you are seeing: Take image. Local solve (fail). Blind solve using same image (fail). Pause (via delay setting). Local solve (using the previous image) - fail. Remote solve using previous image (fail) … etc.??

It should be taking a new image whenever a new local solve is initiated.

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[nickstarboy]

Hi Ross,

Yes - I think the problem is me, I hadnt realised it was immediately going to blind solve.

Having said that, I do have retries set to 3, which i interpreted as ‘local’ retries - but i guess it does a blind solve before it ‘retries’, with a new image. I didnt let it get that far.

I’ll check. I still recall getting total failure when the first image was trailed, but I could be wrong, so ignore this for now.

Cheers!

[nickstarboy]

yup! all my mistake for misunderstanding. close please! sorry guys!

[nickstarboy]

this was all my misunderstanding...it works fine. closed!