feature tracking - planetary - feedbacks?

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Re: feature tracking - planetary - feedbacks?

#21

Post by admin »

Hi Mike,

so, when you pick a movement speed other than 'Guiding', SharpCap sends commands to the mount to move the RA and DEC axes at the rate you have chosen - maybe 4x sidereal rate. Now, the problem is that it's not really well defined as to what happens then if the mount is already tracking the stars... Is the movement at 4x relative to the tracking rate (that would be good), or is it 4x relative to stationary, in which case as far as the apparent movement of a star/planet/sun/moon etc is concerned, would be 5x in the -RA direction and 3x in the +RA direction. I think your mount is doing the latter - speed is relative to stationary - which means that the speeds measured by SharpCap do not match.

You can try using the guiding rate, which shouldn't be affected by this, or using the highest rates shown - for instance if 16x is an option then the measured movements would be 15x in one direction and 17x in the other, which are pretty close (compared to 3x vs 5x).

cheers,

Robin
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Re: feature tracking - planetary - feedbacks?

#22

Post by cine »

hi robin

got you, it was set to 1x will try once cloud clears and get back to you

mike
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Re: feature tracking - planetary - feedbacks?

#23

Post by cine »

Hi Robin

I tried all speeds up to x16 must say at that speed image does bounce a little bit during movement so may be too fast but i can get RA to pass but it fails at DEC see below. Not sure why Sharpcap has an issue such a bad time find mount direction i use PHD2 all the time never had any issue with its calibration and would think its kind of doing the same thing.

Mount: {X=-1, Y=0}, Image {X=9.209732, Y=31.96031}
Mount: {X=-1.25, Y=0}, Image {X=18.14889, Y=56.19358}
in void SharpCap.FeatureTracking.PointList.LogData()
Debug 08:50:23.131203 #23 SharpCap.FrameTransforms.HistogramTransformControl processed frame in 0ms in void SharpCap.Base.CaptureProviderBase<T>.ActuallyProcessTransform(IFrameTransform frameTransform, ICapturedFrame frame, ICapturedFrame sourceFrame)
Warning 08:50:31.708729 #28 No significant regression (maxsplit=0.5, nullCount=0) result from : in bool SharpCap.FeatureTracking.PointList.Analyze(double positionUncertainty)
Info 08:50:31.709726 #28 0.5,7.510025 in bool SharpCap.FeatureTracking.PointList.Analyze(double positionUncertainty)
Info 08:50:31.709726 #28 1,8.369319 in bool SharpCap.FeatureTracking.PointList.Analyze(double positionUncertainty)
Info 08:50:31.709726 #28 1.25,10.89219 in bool SharpCap.FeatureTracking.PointList.Analyze(double positionUncertainty)
Info 08:50:31.709726 #28 1.5,22.21742 in bool SharpCap.FeatureTracking.PointList.Analyze(double positionUncertainty)
Info 08:50:31.709726 #28 1.6875,30.32343 in bool SharpCap.FeatureTracking.PointList.Analyze(double positionUncertainty)
Info 08:50:31.709726 #28 1.828125,41.40635 in bool SharpCap.FeatureTracking.PointList.Analyze(double positionUncertainty)
Info 08:50:31.709726 #28 1.933594,54.4875 in bool SharpCap.FeatureTracking.PointList.Analyze(double positionUncertainty)
Warning 08:50:31.709726 #28 Failed to produce a good measurement of scale/direction from Dec -ve mount movements in void SharpCap.FeatureTracking.FeatureTrackingModel.DoAppend(LoggingEvent loggingEvent)
Info 08:50:31.709726 #28 Data point log for direction YNegative
Mount: {X=0, Y=-0.5}, Image {X=0.8584023, Y=7.460806}
Mount: {X=0, Y=-1}, Image {X=-6.705273, Y=5.008474}
Mount: {X=0, Y=-1.25}, Image {X=-10.80822, Y=1.349852}
Mount: {X=0, Y=-1.5}, Image {X=-21.14854, Y=-6.808308}
Mount: {X=0, Y=-1.6875}, Image {X=-30.19199, Y=-2.820313}
Mount: {X=0, Y=-1.828125}, Image {X=-40.72834, Y=7.462473}
Mount: {X=0, Y=-1.933594}, Image {X=-54.21817, Y=5.410934}
in void SharpCap.FeatureTracking.PointList.LogData()
Debug 08:50:37.732046 #23 SharpCap.FrameTransforms.HistogramTransformControl processed frame in 0ms in void SharpCap.Base.CaptureProviderBase<T>.ActuallyProcessTransform(IFrameTransform frameTransform, ICapturedFrame frame, ICapturedFrame sourceFrame)
Debug 08:50:52.875052 #23 SharpCap.FrameTransforms.HistogramTransformControl processed frame in 0ms in void SharpCap.Base.CaptureProviderBase<T>.ActuallyProcessTransform(IFrameTransform frameTransform, ICapturedFrame frame, ICapturedFrame sourceFrame)
Info 08:51:02.653542 #1 Toolbar/Menu input : SharpCap.ViewModels.Actions.ShowLogAction executing in async Task SharpCap.ViewModels.UIAction.Execute()
Info 08:51:02.793170 #1 Toolbar/Menu input : SharpCap.ViewModels.Actions.ShowLogAction complete in async Task SharpCap.ViewModels.UIAction.Execute()
Debug 08:51:08.708603 #23 SharpCap.FrameTransforms.HistogramTransformControl processed frame in 0ms in void SharpCap.Base.CaptureProviderBase<T>.ActuallyProcessTransform(IFrameTransform frameTransform, ICapturedFrame frame, ICapturedFrame sourceFrame)


mike
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Re: feature tracking - planetary - feedbacks?

#24

Post by cine »

Hi Robin

I finally got one to work at x4 full disk view of the sun, it seems it does not like any mag using my barlow at x2 at all. is there a way to save the calibration to load at a later date, i take it if i don't move the camera (rotate) it should remain the same

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Re: feature tracking - planetary - feedbacks?

#25

Post by admin »

Hi Mike,

the calibration should automatically save if successful and then auto-reload the next time as long as you use the same camera. Leave the camera in place and it should all work the next time.

cheers,

Robin
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Re: feature tracking - planetary - feedbacks?

#26

Post by cine »

Hi Robin

Been using tracking for a while so posting some feadback.

Calibration does not work very well with any kind of mag from a barlow. i have been calibrating with out it first then fitting camera and barlow after. i think it the case of the tracking rate set to say 16x to be able to get calibration to work the image POI just move to far and fast with the mag

Is there a way you could add a tick box to flip the calibration, having done a caliration once i have to do it over again after i do a meridian flip on the moumt

mike
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Re: feature tracking - planetary - feedbacks?

#27

Post by admin »

Hi Mike,

what happens with the barlow if you use a slower movement rate for calibration (perhaps even down to the guiding rate?) That should cancel out some of the effect of the barlow in making the object move faster/further.

I have a request already on another thread about the meridian flip - going to look into that one.

cheers,

Robin
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Re: feature tracking - planetary - feedbacks?

#28

Post by MikeHuerto »

HI Robin

This is a different Mike!

In the early hours of this morning, I was able to get Feature Tracking to work, only if I selected the ROI option - as you mention above, this requires no calibration, so is probably a good option for the clunky old 14 inch GOTO Dobson I own.

The only bad, thing is that I need make sure, that the ROI (it was 488 x 488 for Jupiter using a 3 X Barlow) does not hit the edge of the image frame. Still - its far far easier to guide/nudge this way, than trying to nudge without the SC Feature Tracking via the Synncan App. I noticed that when I kick the ROI back into the center, the planet quickly follows the ROI box, and recenters back in the center of the ROI

SO, I was thinking - to make it completely automatic, could you program in a second level of control, such that when the ROI gets close to the edge of the frame, SC kicks it back into the center. Perhaps the calibration for this could be much cruder than that for the "Use Mount Movement Speed" option. It wouldn't have to be to exact, the ROI, would just bounce around the four sides of the full image frame - sort of like a Pinball Planet!

This would be great if you could do this!

The other Mike
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Re: feature tracking - planetary - feedbacks?

#29

Post by admin »

Hi,

yes, I see where that would work - basically the mount movement would be the last resort to bring things back closer to the center. Unfortunately to make that second stage work would require a full calibration of the sort you get when the mount is selected as your movement option (and it sounds as though that doesn't work nicely for you) :(

It's definitely a tricky problem - if we had plate solving information available then that could be used instead of calibration, but that's no good for solar (no plate solving during the day) and for planetary the field of view is usually too small to get working plate solving...

Sometimes I think that deep sky is the easy option, in spite of lots of people starting with lunar/planetary imaging!

cheers,

Robin
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Re: feature tracking - planetary - feedbacks?

#30

Post by Fafa »

Hello Robin
hope you are fine
i was trying again feature tracking- i can confirm working well if i choose "Use camera ROI" in Movement section, but apparently no results if i choose "Use Mount",regardless movement speed i set
I have tried also x4 but seems are no reactions from the mount and planet escaped from the ROI - btw scope control working well with sharpcap
can you please help me to understand the issue? i attach logs
thanks!
Attachments
Log_2022-08-04T01_34_19-5628.log
(868.15 KiB) Downloaded 24 times
Celestron Nexstar 6 SE, asi585mc, starsense autoalign, celestron focus motor
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