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INDI Library v1.7.6 Released. (27 Feb 2019)

First release of 2019 comes with quite a few new drivers across the board along with significant performance improvements to INDI camera and live streaming performance. Many drivers received significant updates to improve performance & stability, while a few were re-written from scratch to be in line with INDI standards. Here are some of the highlights:

Polar Alignment with a restricted view

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Polar Alignment with a restricted view was created by Maxchess

Hi,
I would like to try EKOS Polar alignment but I have a restricted view north. I can see Polaris and about 10-15 deg East and very little west. On the South side I have close to 180 deg. The PA documentation suggests a 30 deg window West or East is required. How tight can it be or are there other options?
Thanks
9 months 2 weeks ago #27270

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Replied by Gonzothegreat on topic Polar Alignment with a restricted view

I use the following github.com/ThemosTsikas/PhotoPolarAlign to polar align my mount.
Was involved in the original script that led to this one ^
Kstars Mac osx
Odroid C1 running indiserver (kept up-to-date with apt-get update/upgrade)
HEQ5 pro / QHY5 / Atik 314L+
9 months 2 weeks ago #27271

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Replied by knro on topic Polar Alignment with a restricted view

There isn't a minimum per se, but 30 is optimal to cover a wide range of the sky to measure the center of rotation more accurately.
Jasem Mutlaq
Support INDI & Ekos; Get StellarMate Astrophotography Gadget.
How to Submit Logs when you have problems?
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9 months 2 weeks ago #27272

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Replied by Maxchess on topic Polar Alignment with a restricted view

OK, with the aid of a chain saw managed to get 20 deg view to east and set PA going at 15 deg to be safe. . Using canon 450 DLSR as camera attached to 90mm, 500mm FL scope. Got to solution and alignment diagram but Stellarmate hung during continuous refresh while i tried to adjust., possibly due to size of refresh files. Will try again in next few nights setting capture to jpeg. However also have Orion StarShoot AutoGuider - with camera. This is a 50mm scope 162mm focal length. Would I be better off using this guide scope for PA. is it accurate enough, is the FOV too wide?
9 months 2 weeks ago #27330

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Replied by wvreeven on topic Polar Alignment with a restricted view

I use an ASI120MC-S on a 50 mm F=280 mm finder scope which yields a FOV of about 1 degree and I very often use that successfully for PA. I also use a Canon DSLR on a WilliamOptics 71 mm ZenithStar with F=427 mm (including flattener) and that gives a FOV of 3 x 2 degrees and that works very well as well.
Modded Canon EOS 700D with a SkyWatcher Esprit 80 ED on a SkyWatcherHEQ5-Pro

ASI1600MM-C CCD and filter wheel with an 8" TS Ritchey-Chrétien on a SkyWatcher EQ6-R
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9 months 2 weeks ago #27331

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Replied by Maxchess on topic Polar Alignment with a restricted view

Still struggling to get PAA to work. I tried Canon 450D on a 90mm Refractor FL 500 mm which has a FOV of 2.49° x 1.66°. I first tried using native RAW files it solved and displayed the offset diagram but then hung during looping exposures. I assume because of the file size. I then changed the format to "Medium fine Jpeg It took and solved 3 images and then crashed before displaying the offset diagram.. I did this twice. I tried my ZWO ASI 178MC on the 90mm frac but this gave a FOV of 0.85° x 0.57° and it refused to solve.

I also have an 50mm GuideScope + Orion SSAG with a FOV = 2.35° x 1.88° or I could put the ZWO on the guide scope and with a FOV = 2.62° x 1.76°. However the guidescope is mounted on the main telescope and therefore offset from the telescope axis. Does this matter or am I misunderstanding the geometry.

What do you think is my best bet for a successful PA? Also does it matter how good the PA is when you start the process?

I am also struggling with the internal guider but think I need to get the PA spot on to improve my chances of good guiding.
9 months 1 week ago #27391

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Replied by knro on topic Polar Alignment with a restricted view

Can you share the logs please? Ekos _should_ work with all the above. For Canon, the format has to be FITS for this to work. But otherwise, it wouldn't be a problem even with large size. Same with ZWO ASI.
Jasem Mutlaq
Support INDI & Ekos; Get StellarMate Astrophotography Gadget.
How to Submit Logs when you have problems?
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9 months 1 week ago #27393

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Replied by petarm on topic Polar Alignment with a restricted view

I have a similar issue at one of my observation sites where i cannot see the South Celestial Pole (SCP) region (too many trees in the way).

Before i started using kstars, I was doing a drift align using phd2. Does the ekos polar align tool work if you cannot see the pole? Can you just slew to an area that is in view and use the polar alignment method in kstars? O do you have to be very close to the pole?

regards
Takahashi FC-100DF, Skywatcher HEQ5 Pro Wifi, QHY-163C, ZWO ASI 224MC on Orion 50mm guide scope, VNC to Intel Compute Stick running Ubuntu 16.04LTS and KStars
9 months 1 week ago #27394

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Replied by wvreeven on topic Polar Alignment with a restricted view

knro wrote: Can you share the logs please? Ekos _should_ work with all the above. For Canon, the format has to be FITS for this to work. But otherwise, it wouldn't be a problem even with large size. Same with ZWO ASI.


I use RAW with my Canon EOS 700D and polar alignment always works even if it is slow due to the large file size and the fact that I am using a raspberry pi. FYI I am using the offline solver.
Modded Canon EOS 700D with a SkyWatcher Esprit 80 ED on a SkyWatcherHEQ5-Pro

ASI1600MM-C CCD and filter wheel with an 8" TS Ritchey-Chrétien on a SkyWatcher EQ6-R
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9 months 1 week ago #27395

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Replied by Maxchess on topic Polar Alignment with a restricted view

OK thanks for the advice. I will make sure I use FTS and switch logs on for next time. I am now away for around 4 weeks so it will be a while before I can report on my new attemps
9 months 1 week ago #27398

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Replied by Maxchess on topic Polar Alignment with a restricted view

I managed to get the Polar Alignment system to work but the error reported was 25 mins even after 3 attempts.

My process was as follows:
I have an HEQ5-Pro mount on a steel pier set in a concrete block.
I used my Orion Starshoot autoguider and Orion 50mm guide scope for the PA.
I started by using the HEQ5 built in polar scope to get the best manual alignment using the George Varros PA app.

I ran PA and it completed all three images and gave me an adjustment image.
After adjusting the mount I re-ran the PA process expecting the error to be much smaller, but It still showed the same magnitude of error and needed a significant adjustment.
I ran it again, same result.
I then checked the PA using the HEQ5 built in scope and it was way off.

Any idea what is happening here?
8 months 1 week ago #28504

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Replied by knro on topic Polar Alignment with a restricted view

Got log? Someone else reported this issue before.. i.e. they had to do reverse direction to get it right. Maybe optical system affects this, I'm not sure.
Jasem Mutlaq
Support INDI & Ekos; Get StellarMate Astrophotography Gadget.
How to Submit Logs when you have problems?
Add your observatory info
The following user(s) said Thank You: Maxchess
8 months 1 week ago #28507

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