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INDI Library v1.8.0 is Released (27 Jul 2019)

INDI Library v1.8.0 is mostly a maintenance release to fix a few bugs in several drivers.

Re-Alignment after so many ditherings

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Re-Alignment after so many ditherings was created by PK

Maybe there is a way to resolve this already, but I have not seen it.

Problem. After many ditherings, the target can be quite a bit away from where it started.
Often, it's not a problem, as it's not off by much, and my target is centered anyway.
But occasionally, on very large subjects, I can find that dithering moves a critical star or object that was on the edge of the frame off the edge.

Solution: After a set amount of ditherings (user controlled), EKOS performs a re-alignment using the very first image in the session as the reference image.

Thanks!

iOptron CEM25P
William Optics Star71
ASI 1600Mm Pro
Moonlight motorfocus
LodeStar X2 and ZWO OAG
DewBuster
NANO PC-T4
6 months 1 week ago #34849

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Replied by knro on topic Re-Alignment after so many ditherings

Right now, it's hardcoded to wander a maximum of about 25 pixels. Have you seen it stray more than that? I guess I should make this value configurable.
Jasem Mutlaq
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6 months 1 week ago #34852

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Replied by wvreeven on topic Re-Alignment after so many ditherings

Jasem, that is pixels of the guide cam, right? Not pixels of the imaging cam?
ASI1600MM-Pro Cooled and filter wheel with a SkyWatcher Esprit 80 ED on a SkyWatcher HEQ5-Pro

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6 months 1 week ago #34853

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Replied by PK on topic Re-Alignment after so many ditherings

Here's a video of what I see:



Dither set to 3 px.
Exposures 120 seconds each.

Peter

iOptron CEM25P
William Optics Star71
ASI 1600Mm Pro
Moonlight motorfocus
LodeStar X2 and ZWO OAG
DewBuster
NANO PC-T4
Last edit: 6 months 1 week ago by PK.
6 months 1 week ago #34858

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