RA only guiding

Questions, bug reports, requests for enhancements, etc.
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Peter Polakovic
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Re: RA only guiding

Post by Peter Polakovic »

Pls. can you make a screenshot of v4 settings (or capture an output of terminal command "defaults read eu.cloudmakers.AstroGuider")?

It looks it is really trying to correct just RA drift, what's correct, but it is too aggressive (and thus value is always just 1 or -1, because it is probably the limit). What drift detection algorithm do you use?
Awesom-0
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Joined: Wed Feb 03, 2021 3:58 pm

Re: RA only guiding

Post by Awesom-0 »

I took screenshots of the 4.x settings. Let me know if you need anything else.
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Screen Shot 2021-07-12 at 5.05.50 PM.png
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Awesom-0
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Re: RA only guiding

Post by Awesom-0 »

You asked about the drift detection mode: Selected star detection mode, screenshot of the settings attached.
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Screen Shot 2021-07-12 at 5.10.36 PM.png
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Peter Polakovic
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Re: RA only guiding

Post by Peter Polakovic »

Hm, aggressivity is quite conservative, so it is not the issue. Try to turn off automatic subframe selection (the 2nd selected button in your screenshot), if you use long focal length, autosubframe size = 2 or detection radius = 8 may be too low.

But if you use long focal length, calibration step = 2.0 looks too high.

What was "speed" when the calibration was finished?

I have to check mixing versions 4.0 and 3.16, maybe this is the problem...
Awesom-0
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Joined: Wed Feb 03, 2021 3:58 pm

Re: RA only guiding

Post by Awesom-0 »

I only installed 3.16 to test after having issues the first night, just FYI. I don’t run them both at the same time. So unlikely that this is an issue, given that I had this issue before installing 3.16.

The focal length on the guide scope is 120mm.
WO uniguide 32.

The speed did not change after calibration.

I’ll try not using the subframe selection during my next session with this rig, I think I may have tried that last time I was out but didn’t make a note of it.

What’s a “long” focal length for a guide scope based on your question?

Are you aware of anyone successfully using the RA guiding with the star adventurer? It’s a pretty common star tracker, so I’d think others would have tried this…
(For now I’ll just keep using the 3.16, and continue to test v4 if this helps the community. If I’m the only one with this problem, I have a work around with 3.16.)
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Peter Polakovic
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Re: RA only guiding

Post by Peter Polakovic »

For such a short focal length are the default preferences OK. Just try to change calibration step to 0.2s.

But if speed didn't change, the calibration was unsuccessful. RA speed shouldn't be 0. You should see something like this at the end of the calibration:

Screenshot 2021-07-13 at 19.19.22.jpg
Screenshot 2021-07-13 at 19.19.22.jpg (309.8 KiB) Viewed 175 times
Maybe check this for fine-tuning of v4 agent...

https://github.com/indigo-astronomy/ind ... _TUNING.md
Awesom-0
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Joined: Wed Feb 03, 2021 3:58 pm

Re: RA only guiding

Post by Awesom-0 »

Thanks, I'll check and see what happens on the next calibration and adjust those settings as needed to see if it helps!
BTW - what should the calibration step be by default? Is 2 the default, or should it have been .2? Noticing that in the older version of code 3.16, it is set to .2 already for calibration step?

Much appreciated.
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Peter Polakovic
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Re: RA only guiding

Post by Peter Polakovic »

It depends on focal length, but a good starting point is 0.2. It is increased or decreased automatically if needed.
Awesom-0
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Re: RA only guiding

Post by Awesom-0 »

Had a chance to try the step change and removing the subframe selection option.
Still had no love in guiding in RA only.
Attached screenshots of the post-calibration settings.
And then a quick show of the guiding that took place immediately after.

I stopped using v4, and went back to 3.16 and guiding went smoothly last night. Attached screen shot of 3.16 post calibration settings too.
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Screen Shot 2021-07-14 at 11.03.26 PM.png
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Screen Shot 2021-07-14 at 10.52.37 PM.png
Screen Shot 2021-07-14 at 10.52.37 PM.png (84.98 KiB) Viewed 161 times
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Peter Polakovic
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Re: RA only guiding

Post by Peter Polakovic »

Well, the problem may be the angle (but I'm not quite sure, the interpretation between 3.x and 4.x changed to be compatible with some standards). I'll try to reproduce it with the simulator...

But what I don't understand is the drift shown on the middle screenshot. It shows a very fast drift on both RA and Dec (1" per second?), so the mount was bad aligned. I can't imaging it worked with 3.16...
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