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27 Feb 2017
INDI development team is happy to announce the release of INDI Library v1.4.0. This new exciting release builds on the maturity of INDI Library and comes with many new supported devices and fixes for existing drivers. Several improvements and enhancements are included in this release including native support for Cygwin and MacOS platforms in addition to Linux, BSD, and Windows (Client only).
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TOPIC: Exciting new tool in Ekos for Mount Modelling

Exciting new tool in Ekos for Mount Modelling 2 weeks 3 days ago #15032

This tool is developed by Robert Lancaster, and ... well, see the screenshot to see what is it about:



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The following user(s) said Thank You: nmac, Kaczorek, Gilles, Casaro68, dokeeffe, supernov, crose01, maudy

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Exciting new tool in Ekos for Mount Modelling 2 weeks 3 days ago #15033

Hello,
This is a nice improvement of the astrometry tool.
Would it be possible to have an explanation about it by the creator ?
Clear skies
Patrick

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Exciting new tool in Ekos for Mount Modelling 2 weeks 1 day ago #15070

I will make something to explain it soon. I am still trying to refine it a little. It does work very well now I think, but could use a little more "spit and polish". It is almost there.

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Exciting new tool in Ekos for Mount Modelling 1 week 4 days ago #15161

This morning I tested the astrometry function with simulators.
I tracked the HD198149 star and try to solve field. The process doesn't converge to a solution. Is it because of the simulators or the process itself ?
I have to mention that I had, sometimes, same behaviors in real situation in some regions of the sky.

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Exciting new tool in Ekos for Mount Modelling 1 week 4 days ago #15166

The mount model tool did not change the behavior of the Ekos astrometric solver and astrometry.net, it just makes use of them. The simulators and astrometry often solve very well when everything is set up right. I usually use the offline solver and my images solve within a few seconds. The exception is near the poles, things do not solve well at all there. Anywhere else in the sky, it should solve pretty quickly. It just may take a little adjustment.

I have found that a number of factors can affect whether an image gets solved or not. First, are you using the online or offline solver? If you are using the offline one, then you need to have the right index files and need to have the right programs properly installed, if you are using the online solver, you must have a connection to the internet and their servers must be working properly. Second, did you get the right number of stars? You can increase or decrease the exposure time or bin your images more or less to change this. I will usually just play with these two settings when a field doesnt solve. Third, do you have all of the settings correct for the solver such as the telescope equipment, the fits2fits parameter, the coordinates, the search radius, etc. Sometimes, you can just remove or change a parameter that is causing problems and it solves right away.

Hopefully this helps. Thanks

Rob

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Exciting new tool in Ekos for Mount Modelling 1 week 4 days ago #15167

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Haven't had clear weather to try this on real setup yet, but with simulators I noticed that sometimes when running the modeling it starts a new image capture immediately after starting slew to next star. I guess it sees the mount as idle even though it has just issued a slew command. Maybe it should first wait until the mount status changes to busy and then back to idle, though it might be a simulator only issue as well.

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Exciting new tool in Ekos for Mount Modelling 1 week 4 days ago #15169

Hello Robert,
I assume that it is not your tool that is to incriminate. Maybe I would have to open a new thread for this topic.
For the test I evoke I just used simulators. And all looks fine, I have the good focal and aperture.
But for this object HD198149 the solver never converge and doesn't move the simulator mount. The object is 61° DE which is far from the North Pole.
I tried to do the same for Alderamin in Cepheus and the result was identical.
I have set the telescope focal and aperture to respectively 777 and 111mm. The camera simulator is 1280x960 pixels of 3,75µm. And all the index files covering the computed field (41.3' x 30.9') are presents (index-4208.fits 2Mass and index-4108.fits Tycho2).


Hum, maybe I am silly or Alzheimer. I guess the CCD simulator cannot change the view of the targeted field. So, the process can enter in infinite loop never finding the good solution. If I am right, I am sorry, this topic is not a good one.
But now I understand the philosophy of your tool and YES the automatic mount model is a great improvement and a really good use of astrometry. I hope to test it very soon. Maybe tonight if the weather remain clement.
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Last Edit: by patdut.

Exciting new tool in Ekos for Mount Modelling 1 week 4 days ago #15176

From your screenshot, it looks like it did solve the image, but you have told it to "slew to target" and you have the accuracy required to be 15. I think its a simulator issue. I have found that the simulator always has a certain amount of error and a sync does not correct it. I would recommend requiring 30 arcsec instead or setting the align module l to sync only and not "slew to target" so that it can actually complete if you want to test the modeling tool with the simulators. The error in the simulator is nice for testing purposes, but you cannot expect its accuracy to improve like a real mount with a pointing model would (unless the simulator is rewritten).

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Exciting new tool in Ekos for Mount Modelling 1 week 4 days ago #15177

jpaana wrote: Haven't had clear weather to try this on real setup yet, but with simulators I noticed that sometimes when running the modeling it starts a new image capture immediately after starting slew to next star. I guess it sees the mount as idle even though it has just issued a slew command. Maybe it should first wait until the mount status changes to busy and then back to idle, though it might be a simulator only issue as well.


It shouldn't start the capture until it arrives at the star. do you know the circumstances under which this happens or is it random?

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Exciting new tool in Ekos for Mount Modelling 1 week 4 days ago #15191

Tested it an hour ago. It works fine on 3 stars in Leo. But as for the first iterations the error is huge the colored target becomes very very tiny. So we have to rescale and pan. It would be better to rescale the target while the points are drawn. Maybe it could exists better solutions.

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Last Edit: by patdut.

Exciting new tool in Ekos for Mount Modelling 1 week 4 days ago #15192

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As far as I see it seems to be random, probably a race condition, but quite easy to reproduce.

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Exciting new tool in Ekos for Mount Modelling 1 week 4 days ago #15195

patdut wrote: Tested it an hour ago. It works fine on 3 stars in Leo. But as for the first iterations the error is huge the colored target becomes very very tiny. So we have to rescale and pan. It would be better to rescale the target while the points are drawn. Maybe it could exists better solutions.


The target size is determined by the requested accuracy in the solver at the moment, which you can change whenever you like.

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