Perhaps a strategy that could work for low latitude polar alignment with the PPA is applying atmospheric refraction corrections to the position of the NCP, as is done with traditional celestial navigation.
There are complete reference tables that only need the temperature and air pressure, but can also be calculated.
If I am not mistaken, the Polemaster takes refraction into consideration, and it is the reason they specify the orientation of the camera on the mount. In our case orientation relative to horizontal can be determined with plate solving and hour angle.

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Andrew replied to the topic 'Astroberry GPS with Adafruit GPS breakout board' in the forum. 2 days ago

I've always had to go through with setting up NTP to get the system to use the GPS as a time source, and GPSD required a few options on startup. Alternatively you can try Chrony instead of NTP.
gpsd.gitlab.io/gpsd/gpsd-time-service-howto.html

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Paul thanked Andrew in topic Writing dslr temperature 4 days ago

Andrew replied to the topic 'Writing dslr temperature' in the forum. 4 days ago

The temperature is logged in the EXIF metadata, but is generally not shown by photo editing software. It would have to be read and added to the file name.
Currently I know of only a couple tools to access that information: ExifTool by Phil Harvey, a command line application for Windows, with a GUI made separately for it. And, EXIFlog which I have not used yet.

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Always make a backup image or a working setup before updating.

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I use a custom driver for my focuser. Sometimes I have to recompile it after kstars/indilib is updated.

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Andrew replied to the topic 'Box for cable management' in the forum. 1 week ago

:blink:
Well it's unique! I would be concerned with all that unsecure mass shifting during an exposure causing vibrations.

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Andrew replied to the topic 'Stop trying to use Astroberry kstars and ekos - I'm tired' in the forum. 1 week ago

WiFi hotspots can be troublesome. For instance only my tablet will not connect to the hotspots on my RPi4 with Raspbian Buster unless I make it an open network with no password.
There are other options at your disposal. You can try an external WiFi adapter, change the wifi channel, use 2.4Ghz instead of 5Ghz. Or could connect over a direct ethernet connection.

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Andrew replied to the topic 'New Bahtinov Mask Assistant Tool' in the forum. 1 week ago

AstroRunner wrote: I am currently doing research into generation of Bahtinov diffraction patterns


Did you look at the Muskulator app I posted earlier?
www.indilib.org/forum/ekos/4547-new-baht...l.html?start=0#34600

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Andrew replied to the topic 'reverse direction back to normal when connecting to Ekos' in the forum. 2 weeks ago

Hello. I see you are new here. Chances are it's as simple as this. You simply have to save the driver configuration in the INDI control panel.
BTW. Do feel free to share details on how focuser build. :)

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Andrew replied to the topic 'Using 3 cameras at once?' in the forum. 2 weeks ago

How would it handle dithering with different exposure lengths? For example, camara 1 takes 300 second exposures on the main scope, and 120 seconds with a piggybacked camera 2. Having the shorter exposure camera waiting for the longer shot to finish is inefficient. So ideally dithering will take place with the least amount of idle time according to a ratio of images between camera 1 and 2 to finish.
With my example Camera 1 fanishes 1 image in 300 seconds and camera 2 can take 2 in 240 seconds but would then idle 60 seconds a ratio of 1:2. Instead camera 1 can take two images in 600 seconds, and camera 2 can finish 5 with zero idle time, a ratio of 2:5. While that works in theory; the time to download each frame must also be considered. Each frame could take 10-20 seconds to download. That would have to be added to the time per frame and could change the most efficient ratio between camera 1, 2, or more cameras.

Certainly not very straightforward.

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Paul Nixon thanked Andrew in topic QHY224C problem 3 weeks ago

Andrew replied to the topic 'QHY224C problem' in the forum. 3 weeks ago

I can select the QHY for imaging *and* guiding - is that what you're referring to?

It wasn't, but it doesn't matter. Right now I believe you should update and try the latest patched QHY driver from this week.
Just make a backup if you are unsure to have something to go back to.

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Andrew replied to the topic 'My shopping list for my notional Pi 4 SM gadget' in the forum. 3 weeks ago

If you are looking for speed and reliability, the form of memory and cache of an SSD will greatly out perform a memory stick.

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