Peter Greis replied to the topic 'New User - A speed question' in the forum. 4 years ago

hy:

It's been awhile, but I have been testing and experimenting with your suggestions.

So here's what I have seen using the Alignment module:

It takes 1 sometimes up to 2 1/2 minutes from "exposure done" to "image received" using the online solver. It typically takes from 90 to 160 sec for the solver to complete:

[2020-08-02T22:47:12.246 Eastern Daylight Time INFO ][ org.kde.kstars.ekos.align] - "Capturing image..."
[2020-08-02T22:47:12.271 Eastern Daylight Time INFO ][ org.kde.kstars.indi] - Canon DSLR EOS 77D : "[INFO] Starting 15 seconds exposure. "
[2020-08-02T22:47:34.074 Eastern Daylight Time INFO ][ org.kde.kstars.indi] - Canon DSLR EOS 77D : "[INFO] Exposure done, downloading image... "
[2020-08-02T22:48:57.199 Eastern Daylight Time INFO ][ org.kde.kstars.ekos.align] - "Image received."
[2020-08-02T22:48:58.024 Eastern Daylight Time INFO ][ org.kde.kstars.ekos.align] - "Solver iteration #1"
[2020-08-02T22:48:58.575 Eastern Daylight Time INFO ][ org.kde.kstars.ekos.align] - "Uploading file..."
[2020-08-02T22:50:10.007 Eastern Daylight Time INFO ][ org.kde.kstars.ekos.align] - "Upload complete. Waiting for astrometry.net solver to complete..."
[2020-08-02T22:51:38.925 Eastern Daylight Time INFO ][ org.kde.kstars.ekos.align] - "Solver completed in 161 seconds."
[2020-08-02T22:51:38.991 Eastern Daylight Time INFO ][ org.kde.kstars.ekos.align] - "WCS information updated. Images captured from this point forward shall have valid WCS."
[2020-08-02T22:51:38.993 Eastern Daylight Time INFO ][ org.kde.kstars.ekos.align] - "Solution coordinates: RA (21h 01m 52s) DEC ( 68° 14' 28\") Telescope Coordinates: RA (21h 01m 52s) DEC ( 68° 14' 55\")"
[2020-08-02T22:51:38.993 Eastern Daylight Time INFO ][ org.kde.kstars.ekos.align] - "Target is within 00° 00' 26\" degrees of solution coordinates."

If i use astrometry on the Pi3, takes from 40 sec to over a min from "capturing image" to "image received" and 1 1/2 min to 2 min to solve:

[2020-08-02T23:52:11.655 Eastern Daylight Time INFO ][ org.kde.kstars.ekos.align] - "Capturing image..."
[2020-08-02T23:52:11.765 Eastern Daylight Time INFO ][ org.kde.kstars.indi] - Canon DSLR EOS 77D : "[INFO] Upload settings set to client only. "
[2020-08-02T23:52:11.768 Eastern Daylight Time INFO ][ org.kde.kstars.indi] - Canon DSLR EOS 77D : "[INFO] Starting 15 seconds exposure. "
[2020-08-02T23:52:33.359 Eastern Daylight Time INFO ][ org.kde.kstars.indi] - Canon DSLR EOS 77D : "[INFO] Exposure done, downloading image... "
[2020-08-02T23:53:11.049 Eastern Daylight Time INFO ][ org.kde.kstars.ekos.align] - "Image received."
[2020-08-02T23:53:11.052 Eastern Daylight Time INFO ][ org.kde.kstars.ekos.align] - "Solver iteration #1"
[2020-08-02T23:53:59.464 Eastern Daylight Time INFO ][ org.kde.kstars.ekos.align] - "Starting remote solver..."
[2020-08-02T23:53:59.641 Eastern Daylight Time INFO ][ org.kde.kstars.indi] - Astrometry : "[INFO] Astrometry solver is enabled. "
[2020-08-02T23:54:13.031 Eastern Daylight Time INFO ][ org.kde.kstars.indi] - Astrometry : "[INFO] Solving image... "
[2020-08-02T23:55:45.702 Eastern Daylight Time INFO ][ org.kde.kstars.ekos.align] - "Solver completed in 93 seconds."
[2020-08-02T23:55:45.728 Eastern Daylight Time INFO ][ org.kde.kstars.ekos.align] - "Solution coordinates: RA (21h 37m 45s) DEC ( 57° 28' 48\") Telescope Coordinates: RA (21h 36m 37s) DEC ( 57° 29' 21\")"
[2020-08-02T23:55:45.728 Eastern Daylight Time INFO ][ org.kde.kstars.ekos.align] - "Target is within 00° 16' 53\" degrees of solution coordinates."
[2020-08-02T23:55:45.743 Eastern Daylight Time INFO ][ org.kde.kstars.ekos.align] - "Syncing to RA (21h 37m 45s) DEC ( 57° 28' 48\")"

What I find interesting is that when I am capturing images in the CCD module locally to the Pi3, it takes only about 10 sec from image captured until I can view them on Pi3.

I was thinking that the difference is that the alignment module is sending a copy to Ekos running on my laptop as well as capturing it on the Pi, thereby making the process much longer. If I'm using Astrometry for solving on the Pi, why would it send an image to EKOS on laptop?

Thanks for all your help

Peter

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