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INDI Library v2.0.7 is Released (01 Apr 2024)

Bi-monthly release with minor bug fixes and improvements

Ekos internal guider calibration best practice

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In PHD2 it is recommended to calibrate near the meridian with dec=0 and then re-use that calibration for guiding when slewing toward the imaging target for the night. 
When using the Ekos internal guider does the same principle applies for calibration? So far I have been doing my calibration on my target for the night and recalibrate every time i move to a new target...
I'm just wondering if my guiding accuracy would improve by calibrating near the meridian with dec at zero.



 
2 years 8 months ago #74372

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I calibrate near the meridian near the equator and then save and reside the calibration for weeks and maybe months.

Seems to work just fine. I typically get guide rms < 0.5 arcsec
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2 years 8 months ago #74383

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+1.  The calibration I use I did in April, IIRC.
What is true for PHD2 also holds for the internal guider:  Do the calibration close to the equator (there you have full RA speed) and as high elevation as possible (i.e., close to meridian) to minimize influence of refraction and seeing.
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2 years 8 months ago #74388

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Thanks guys. So if I understand this correctly, for me being in the southern hemisphere, I would point the scope North and set DEC to zero or close to it right?
I just did a quick simulation in Kstars... and based on my understanding if I picked these coordinates that should give me good calibration:
RA: 05h 12m 00.00s. DEC: 00.32.30.48. Azimuth 359 37 25. Altitude 51 31 51
Do I get this right?
Edit: Answering my own question here... I didn't have the meridian and equatorial lines toggled on in Kstars preferences... so yes my above assumption is correct
Last edit: 2 years 8 months ago by Steeve Body.
2 years 8 months ago #74393

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:D
Yes, Az and Alt numbers look good. RA is of course not too meaningful without knowing location and time ;-)
2 years 8 months ago #74405

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Well I calibrated last night near the meridian and equator and I was getting 0.5rms all night… so I guess that’s pretty good!
2 years 8 months ago #74426

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