Andrew replied to the topic 'Re:Are there situations where polar alignment does not work?' in the forum. 3 days ago

It is a good idea to clear the alignment model after the PA procedure because adjusting the ALT AZ bolts will invalidate the model.
That being said I think it is done automatically for you, but in not sure.

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Andrew replied to the topic 'Are there situations where polar alignment does not work?' in the forum. 3 days ago

I would check for and eliminate any sources of differential flexure. If for any reason as the mount rotates over something shifts, that will throw off the results. This may require beefing up your guide scope mounts. If for instance if it only has one ring with 3 points of contact, upgrade to 2 rings with 6 points of contact.

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Andrew replied to the topic 'Astroberry Focuser with Adafruit Motor HAT' in the forum. 2 weeks ago

berendj:
Place the executable in /usr/bin, not in /usr/local/bin

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Andrew replied to the topic 'How to use smartphone GPS with INDI-GPSD' in the forum. 4 weeks ago

Regarding setting Linux system time with GPS/NTP server, from my experience the NTP daemon will not sync the system time if it is too far off automatically. It considers the time to be in error. My solution is to run a python script to force the system time to sync with the NMEA source. NTP will then keep in sync. My script requires Sudo, perhaps it can be improved or a replacement integrated? Because if Kstars/INDI can keep my system clock set, that is one less thing to do when I power on a Raspberry Pi.
Time sync script:

import os
import sys
import time
from gps import *

print 'Attempting to access GPS time...'

try:
	gpsd = gps(mode=WATCH_ENABLE)
except:
	print 'No GPS connection present. TIME NOT SET.'
	sys.exit()

while True:
	gpsd.next()
	if gpsd.utc != None and gpsd.utc != '':
		gpstime = gpsd.utc[0:4] + gpsd.utc[5:7] + gpsd.utc[8:10] + ' ' + gpsd.utc[11:19]
		print 'Setting system time to GPS time...'
		os.system('sudo date -u --set="%s"' % gpstime)
		print 'System time set.'
		sys.exit()
	time.sleep(1)

It also requires configuration of ntp.conf with the addition of these lines.
server 127.127.28.0 minpoll 4
fudge  127.127.28.0 time1 0.183 refid NMEA
server 127.127.28.1 minpoll 4 prefer
fudge  127.127.28.1 refid PPS


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Andrew replied to the topic 'How to use smartphone GPS with INDI-GPSD' in the forum. 4 weeks ago

I'm pretty impressed by how quickly this has progressed.
T-Studio, yes the Pi 3 WiFi can work in adhock mode. I've been using it this way due some time and for gps over network just fine with gpsd.

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Andrew replied to the topic 'Polar alignment could be better' in the forum. 1 month ago

That full screen button is a useful tip. I will try it. Should be better than zooming and panning the smaller image.

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Andrew replied to the topic 'Manual Coordinates' in the forum. 1 month ago

Thank you both. The mount control window appears to be the simplest way.

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Andrew created a new topic ' Manual Coordinates' in the forum. 1 month ago

Is there an easy way to slew to manually entered coordinates? I found under the Pointing menu I can do that for the cursor, but it did not have an option to slew to target from there.

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Andrew replied to the topic 'FOV must be 30 arcmins or wider' in the forum. 1 month ago

The field of view is required because the Astrometry solver has a difficult time solving very small FOVs. You may be able to get around this by using your guide scope, which is already recommended because of how slow downloading from a DSLR is.

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Andrew replied to the topic 'Cone Error Correction assistant.' in the forum. 2 months ago

That is very interesting. However I generally use my guide scope to perform the PAA because it is much faster at transferring images than my imaging DSLR. While that is ok because it relative to the mount rotation, it's orthogonality can be way off from the OTA; thus giving a different cone error. Therefore it's own routine, strictly imaged through the OTA is necessary.

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Andrew replied to the topic 'Camera debug setting disabled immediately after I enable it' in the forum. 2 months ago

/home/*****/.local/share/kstars/logs

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Andrew created a new topic ' Cone Error Correction assistant.' in the forum. 2 months ago

While cone error can be corrected with a good mount model to improve GoTo's. It is desirable to eliminate as much mechanical misalignment as possible.
I would like to see a tool added to the alignment routine similar to the Polar alignment assistant, but for cone error.
PC Software ConeSharp implements a strategy that could be adapted and improved upon with plate solving.
The steps to do it would involve first a precise polar alignment with the Polar Alignment tool. Then to measure cone error slew to a star with low DEC west of the meridian, solve, and record pointing error. Then slew east of meridian, solve and record that error. Lastly calculate a correction vector based on recorded pointing errors.
Is there any interest for such a function?

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Andrew replied to the topic 'Missing ASI dependeny asi-common?' in the forum. 2 months ago

Try:

sudo apt-get dist-upgrade
And follow its recommendations.

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Andrew replied to the topic 'Camera debug setting disabled immediately after I enable it' in the forum. 2 months ago

I believe it is related to the new log management feature.
In EKOS there is a new Logs button in Step 2: Start and Stop INDI, next to the Start INDI button. From there you can enable debugging of drivers.

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Andrew replied to the topic 'Astroberry Focuser with Adafruit Motor HAT' in the forum. 2 months ago

Fantastic! Everything appears to move as expected now. Thank you very much Radek.
For a final tweak, I suggest setting the stepper mode to Double by default in the code. The added torque is useful to avoid skipped steps. And finally to update Astrobery Server with this version.
And with that it appears we have two mature focus drivers for the Raspberry Pi people can choose from. For the Adafruit Motor HAT, and Piface Digital driver boards.
Amazing work.

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Andrew replied to the topic 'Astroberry Focuser with Adafruit Motor HAT' in the forum. 2 months ago

Here is an annotated segment of log as I take small travel steps of 1, with a backlash setting of 25. Note it is directed to go twice the backlash minus the set travel step, also the EKOS pane reports the result with expected value +- 1 step.

2017-10-01T23:34:33	Adafruit Motor HAT Focuser moved to position 0					
2017-10-01T23:35:08	Adafruit Motor HAT Focuser is moving outward by 100					
2017-10-01T23:35:10	Adafruit Motor HAT Focuser moved to position 100					
2017-10-01T23:35:17	Adafruit Motor HAT Focuser backlash compensation by 25 steps...					
2017-10-01T23:35:17	Adafruit Motor HAT Focuser is moving inward by 1					
2017-10-01T23:35:18	Adafruit Motor HAT Focuser moved to position 51	
	^Moved 2x set backlash minus travel steps (1). EKOS reports focuser moved to position 99.
2017-10-01T23:35:21	Adafruit Motor HAT Focuser is moving inward by 1					
2017-10-01T23:35:21	Adafruit Motor HAT Focuser moved to position 98					
2017-10-01T23:35:22	Adafruit Motor HAT Focuser is moving inward by 1					
2017-10-01T23:35:22	Adafruit Motor HAT Focuser moved to position 96					
2017-10-01T23:35:22	Adafruit Motor HAT Focuser is moving inward by 1					
2017-10-01T23:35:22	Adafruit Motor HAT Focuser moved to position 97					
2017-10-01T23:35:23	Adafruit Motor HAT Focuser is moving inward by 1					
2017-10-01T23:35:23	Adafruit Motor HAT Focuser moved to position 95					
2017-10-01T23:35:25	Adafruit Motor HAT Focuser backlash compensation by 25 steps...					
2017-10-01T23:35:25	Adafruit Motor HAT Focuser is moving outward by 1					
2017-10-01T23:35:26	Adafruit Motor HAT Focuser moved to position 144
	^Moved 2x set backlash minus travel steps (1). EKOS reports focuser moved to position 96.
2017-10-01T23:35:33	Adafruit Motor HAT Focuser is moving outward by 1					
2017-10-01T23:35:33	Adafruit Motor HAT Focuser moved to position 97					
2017-10-01T23:35:34	Adafruit Motor HAT Focuser is moving outward by 1					
2017-10-01T23:35:34	Adafruit Motor HAT Focuser moved to position 98					
2017-10-01T23:35:34	Adafruit Motor HAT Focuser is moving outward by 1					
2017-10-01T23:35:34	Adafruit Motor HAT Focuser moved to position 99					
2017-10-01T23:35:35	Adafruit Motor HAT Focuser is moving outward by 1					
2017-10-01T23:35:35	Adafruit Motor HAT Focuser moved to position 100					
2017-10-01T23:35:43	Adafruit Motor HAT Focuser backlash compensation by 25 steps...					
2017-10-01T23:35:43	Adafruit Motor HAT Focuser is moving inward by 1					
2017-10-01T23:35:44	Adafruit Motor HAT Focuser moved to position 51	
	^Moved 2x set backlash minus travel steps (1). EKOS reports focuser moved to position 99.
2017-10-01T23:35:45	Adafruit Motor HAT Focuser is moving inward by 1					
2017-10-01T23:35:45	Adafruit Motor HAT Focuser moved to position 98					
2017-10-01T23:35:46	Adafruit Motor HAT Focuser is moving inward by 1					
2017-10-01T23:35:46	Adafruit Motor HAT Focuser moved to position 96					
2017-10-01T23:35:46	Adafruit Motor HAT Focuser is moving inward by 1					
2017-10-01T23:35:46	Adafruit Motor HAT Focuser moved to position 97					
2017-10-01T23:35:47	Adafruit Motor HAT Focuser is moving inward by 1					
2017-10-01T23:35:47	Adafruit Motor HAT Focuser moved to position 95					
2017-10-01T23:35:49	Adafruit Motor HAT Focuser backlash compensation by 25 steps...					
2017-10-01T23:35:49	Adafruit Motor HAT Focuser is moving outward by 1					
2017-10-01T23:35:50	Adafruit Motor HAT Focuser moved to position 144 
	^Moved 2x set backlash minus travel steps (1). EKOS reports focuser moved to position 96.
2017-10-01T23:35:53	Adafruit Motor HAT Focuser is moving outward by 1					
2017-10-01T23:35:53	Adafruit Motor HAT Focuser moved to position 97					
2017-10-01T23:35:54	Adafruit Motor HAT Focuser is moving outward by 1					
2017-10-01T23:35:54	Adafruit Motor HAT Focuser moved to position 98					
2017-10-01T23:35:54	Adafruit Motor HAT Focuser is moving outward by 1					
2017-10-01T23:35:54	Adafruit Motor HAT Focuser moved to position 99					
2017-10-01T23:35:56	Adafruit Motor HAT Focuser is moving outward by 1					
2017-10-01T23:35:56	Adafruit Motor HAT Focuser moved to position 100					


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Andrew replied to the topic 'Mosaic job and PHD2 not resuming' in the forum. 2 months ago

Not from what I could tell and read up on.
According to Bruce Waddington, a PHD2 developer

PHD2 doesn’t start searching the entire camera frame for a guide star, only for a usable guide star within the original search region.

https://groups.google.com/d/msg/open-phd-guiding/KkuL7vJeOrk/BuaUiKkNBgAJ

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