Which guiding algorithms should I use?

[John Natale]

When setting the guiding algorithms, which settings should I use for both the RA and Dec axis, or doesn't it matter? I have heard a wide range of opinions on Cloudy nights. Not sure whether to select hysteresis, lowpass, lowpass2, resist switch, Predictive PEC or ZFilter for the RA and Dec axis. I have no idea what each means.

[Jens Scheidtmann]

Please familiarise yourself with the extensive PHD2 documentation.

The profile wizard chooses reasonable defaults, which in the most cases will yield reasonable results, given your inputs. 

Hope this helps, Jens

John Natale <jsna...@gmail.com> schrieb am Mi. 26. Juni 2024 um 22:07:

When setting the guiding algorithms, which settings should I use for both the RA and Dec axis, or doesn't it matter? I have heard a wide range of opinions on Cloudy nights. Not sure whether to select hysteresis, lowpass, lowpass2, resist switch, Predictive PEC or ZFilter for the RA and Dec axis. I have no idea what each means.

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[Brian Valente]

Use the new profile wizard and stick with the defaults, it's hard to go wrong with those.

Run the guiding assistant, go with those recommendations (if anything changes), hard to go wrong with those.

If you have a mid-range or lower GEM and find RA is significantly worse than Dec, you can try PPEC algorithm

I would not follow advice from anyone who recommends specific algorithms without seeing your guiding results first.

 

On Wed, Jun 26, 2024 at 1:07 PM John Natale <jsna...@gmail.com> wrote:

When setting the guiding algorithms, which settings should I use for both the RA and Dec axis, or doesn't it matter? I have heard a wide range of opinions on Cloudy nights. Not sure whether to select hysteresis, lowpass, lowpass2, resist switch, Predictive PEC or ZFilter for the RA and Dec axis. I have no idea what each means.

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Brian Valente

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[John Natale]

Thanks Brian. I have no idea what the wizard originally set for algorithms, as I have changed those settings since installing the software. Can you give me a place to start? I.e., start with hysteresis on the RA axis and resist switch on Dec?? Also if the guiding algorithms are set wrong, will the guiding assistant tell me the right ones, or doesn't it cover that?

Jens - thanks also for your response. But as for familiarizing myself with the extensive PhD2 documentation, I was really hoping not to have to read through a lot of technical info. Really hoping someone could give me the info here to avoid having to do that.  I don't have a lot of time! I did do a quick search for PhD2 forum posts on guiding algorithms with the hope of finding something, but nothing useful came up...

[Brian Valente]

>>>  I have no idea what the wizard originally set for algorithms, as I have changed those settings since installing the software. Can you give me a place to start?

yes - create a new profile using the wizard. Best place to start if you've been fiddling with everything. Also sets everything else to default values

then run the calibration wizard

then run the guiding assistant

no documentation reading required ;)

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