1st light NHSA SHG image in H-alpha

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1st light NHSA SHG image in H-alpha

Post by rsfoto »

Hi,

After fiddling arpund for a few weeks today finally 1st light for the NHSA SHG after the fact the morning was totally closed sky but it cleaned up while I was at the tire shop buying some new tires for my wife's car :lol:

I know there is still a lot to learn.

One known problem is the fact the camera USB 3.0 connection is delivering fluctuating frames rates.

At least I know my enchilada is working and delivering images

Below the first and failed round Sun images ... :mrgreen:

Thanks for looking

SHG_1st_light_-15_53_23_shift=0_diskHC.jpg
SHG_1st_light_-15_53_23_shift=0_diskHC.jpg (162.12 KiB) Viewed 1798 times
SHG_1st_light_-16_01_28_shift=0_diskHC.jpg
SHG_1st_light_-16_01_28_shift=0_diskHC.jpg (158.91 KiB) Viewed 1798 times
SHG_1st_light_-16_04_00_shift=0_diskHC.jpg
SHG_1st_light_-16_04_00_shift=0_diskHC.jpg (164.42 KiB) Viewed 1798 times
SHG_1st_light_-16_13_11_shift=0_diskHC.jpg
SHG_1st_light_-16_13_11_shift=0_diskHC.jpg (162.97 KiB) Viewed 1798 times
SHG_1st_light_-16_13_42_shift=0_diskHC.jpg
SHG_1st_light_-16_13_42_shift=0_diskHC.jpg (157.18 KiB) Viewed 1798 times


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Re: 1st light NHSA SHG image in H-alpha

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Hey Rainer. It's a start. Many recognizable features can be seen here.

Congratulations!!

And you haven't failed...


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Re: 1st light NHSA SHG image in H-alpha

Post by marktownley »

For a first light it's not bad!

Interesting and useful to know about the effect of variable frame rate, makes a lot of sense on reflection.


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Re: 1st light NHSA SHG image in H-alpha

Post by thesmiths »

It's more likely that the non-circular image is a result of non-constant scan rate. It is probably because of imperfect balance of the mount.

The sharp discontinuity on the left side (which I assume is closest to the beginning of the scan?) is typically from the acquisition program getting it's buffer filled up and then needs to take a pause before continuing to acquire frames. I'm guess that there was no pause between scans? With most acquisition programs, you can monitor the buffer and see how filled up it gets and also when the program writes all the data to the disk. I generally wait 5 seconds between scans to give the computer time to catch up.


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Re: 1st light NHSA SHG image in H-alpha

Post by rsfoto »

marktownley wrote: Fri Jan 27, 2023 6:43 am For a first light it's not bad!

Interesting and useful to know about the effect of variable frame rate, makes a lot of sense on reflection.
Hi Mark,

Yes, every time one makes a new thing one learns about new problems :mrgreen:


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Re: 1st light NHSA SHG image in H-alpha

Post by rsfoto »

thesmiths wrote: Fri Jan 27, 2023 3:38 pm It's more likely that the non-circular image is a result of non-constant scan rate. It is probably because of imperfect balance of the mount.

The sharp discontinuity on the left side (which I assume is closest to the beginning of the scan?) is typically from the acquisition program getting it's buffer filled up and then needs to take a pause before continuing to acquire frames. I'm guess that there was no pause between scans? With most acquisition programs, you can monitor the buffer and see how filled up it gets and also when the program writes all the data to the disk. I generally wait 5 seconds between scans to give the computer time to catch up.
Hi Doug,

My mount is balanced at 99%, according to me ;) , but another experienced Sol'Ex user said maybe too perfectly balanced ¿?

Will do some tests with a bit of unbalance and check the RA worm and worm gear. My mount has no backlash as the worm is spring loaded against the worm gear.

Will test my SSD drive too.

Looks like I am getting some Sun again today.

Thanks for the tips
Last edited by rsfoto on Fri Jan 27, 2023 5:59 pm, edited 1 time in total.


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Re: 1st light NHSA SHG image in H-alpha

Post by rsfoto »

Hi,

Question for the experts. I used a ROI of 3086 x 240 pixels.

Should I decrease that size ?


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Re: 1st light NHSA SHG image in H-alpha

Post by thesmiths »

In general, you should target as narrow as possible. But it also depends on things like tilt and curvature ('smile') of the spectral line. 240 sounds a bit wide.

In terms of length, maybe target 25% more than the full disk?


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Re: 1st light NHSA SHG image in H-alpha

Post by rsfoto »

thesmiths wrote: Fri Jan 27, 2023 8:31 pm In general, you should target as narrow as possible. But it also depends on things like tilt and curvature ('smile') of the spectral line. 240 sounds a bit wide.

In terms of length, maybe target 25% more than the full disk?
Hi Doug,

Thanks. Did some more tests and the culprit is my mount so far. I need to mechanically check what is going on and perhaps do a lubrication again.

NHSA_SHG_Sol'Ex_-16_26_49_shift=0_diskHC.jpg
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Capture-16_25_28_shift=0_diskHC.jpg (163.39 KiB) Viewed 1699 times


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Re: 1st light NHSA SHG image in H-alpha

Post by PDB »

thesmiths wrote: Fri Jan 27, 2023 8:31 pm In general, you should target as narrow as possible. But it also depends on things like tilt and curvature ('smile') of the spectral line. 240 sounds a bit wide.

In terms of length, maybe target 25% more than the full disk?
Yes size is important for the frame rate in CMOS cameras, but only the height (if the camera is oriented in the correct way, spectrum along the long side)

Since CMOS reads in complete rows, the horizontal size does not really matter for speed, the vertical does.

Usualli I will use anything between 70 and 120 pixels depending on binning, with the 178.

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Re: 1st light NHSA SHG image in H-alpha

Post by thesmiths »

I agree with Paul that the length does not significantly affect download speed, but it does make file sizes larger, which can have the undesirable result of running out of storage space.


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Re: 1st light NHSA SHG image in H-alpha

Post by thesmiths »

rsfoto wrote: Sat Jan 28, 2023 2:31 am
Thanks. Did some more tests and the culprit is my mount so far. I need to mechanically check what is going on and perhaps do a lubrication again.
There is definitely also a camera acquisition issue also, which is causing the sharp discontinuities. With regards to the mount, you might try scanning in the other direction and see if that works better. Some mounts will not scan well in RA but will in DEC.

Looking at your setup on the groups.io forum, your mount looks pretty heavily loaded (with two Takahashi refractors and etalons, I think?). I don't know which mount you are using, but that is a significant amount of mass you are trying to accelerate. You might be better off putting the Solex on its own small mount.

I should mention that scanning back and forth under high load is probably not what the mount was designed for and could cause some wear and tear. I actually burned out the electronics on one mount (an old Vixen GP2) while scanning (it was also a very hot day and something overheated). One Solex user once told me he scans in DEC because if he's going to wear down the gears on his mount, he'd prefer it was the DEC rather than the RA.


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Re: 1st light NHSA SHG image in H-alpha

Post by Montana »

Well done Rainer, these images really made me smile, it's not often we get strange shaped Suns :) :bow :bow :bow

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Re: 1st light NHSA SHG image in H-alpha

Post by rsfoto »

Looking at your setup on the groups.io forum, your mount looks pretty heavily loaded (with two Takahashi refractors and etalons, I think?). I don't know which mount you are using, but that is a significant amount of mass you are trying to accelerate. You might be better off putting the Solex on its own small mount.
Hi Doug,

This is a CEM 120EC2 mounts with a capacity of about 115 pounds eg. 52kg of capacity. what I have on the mount are more or less 25/27 kg of telescopes on it so with 50% that is OK for the mount.

I ordered a new USB 3.0 active cable 5m long and will test that cable and see how it goes.

BTW, do you have a recommendation for a good USB 3.0 hub ? just need two ports ...
Last edited by rsfoto on Sun Jan 29, 2023 4:11 pm, edited 1 time in total.


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Re: 1st light NHSA SHG image in H-alpha

Post by rsfoto »

One Solex user once told me he scans in DEC because if he's going to wear down the gears on his mount, he'd prefer it was the DEC rather than the RA.
OK. If I want to scan in DEC I guess I need to rotate the slit 90° ?


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Re: 1st light NHSA SHG image in H-alpha

Post by thesmiths »

For DEC vs RA scanning, you need to rotate the whole instrument by 90 degrees.

I always try limit myself to the recommended 3m USB 3.0 length. I have tried active hubs but it was not always successful.

You might also try a different acquisition program (like FireCapture).


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Re: 1st light NHSA SHG image in H-alpha

Post by rsfoto »

Hi,

Well I found out it is not the mount but SharpCapw which gives me fluctuating rates between 200 fps and foes down to 20 even 10 fps and then goes up again.

Then I tried FireCapture (not very intuitive program at all, very confuse) and there I got a round Sun. I know the sharpness is totally off but that was the least of my problems :lol:

Now I need to understand ForeCapture.
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Re: 1st light NHSA SHG image in H-alpha

Post by PDB »

Rainer,

you can look at FireCapture training videos (on fc website) or have a look at Martin Lewis his website. You will have to search for it (its under skyinspector.uk under extra stuff)

There is nothing complicated in FireCapture (and much more possibilities than a standard sharpcap)

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Re: 1st light NHSA SHG image in H-alpha

Post by rsfoto »

PDB wrote: Tue Jan 31, 2023 7:42 am Rainer,

you can look at FireCapture training videos (on fc website) or have a look at Martin Lewis his website. You will have to search for it (its under skyinspector.uk under extra stuff)

There is nothing complicated in FireCapture (and much more possibilities than a standard sharpcap)

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Hi Paul,

Thanks and just a few weeks to go for our special event in March :mrgreen: Just 41 days left and counting ...


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Re: 1st light NHSA SHG image in H-alpha

Post by PDB »

You could also try capturing with Genika. Think the latest version does not need a licence anymore
('you might need to install Microsoft Visual C++ redistributable 2010. It just quits without message if that is not on your system.)

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Re: 1st light NHSA SHG image in H-alpha

Post by marktownley »

I think it is coming along fine Rainer. I am enjoying following your results.


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Re: 1st light NHSA SHG image in H-alpha

Post by rsfoto »

PDB wrote: Tue Jan 31, 2023 7:42 am Rainer,

you can look at FireCapture training videos (on fc website) or have a look at Martin Lewis his website. You will have to search for it (its under skyinspector.uk under extra stuff)

There is nothing complicated in FireCapture (and much more possibilities than a standard sharpcap)

Paul
Hi Paul,

I must be stupid and FireCapture is driving me nuts ... :mrgreen:

Please help me. I am using the latest version 2.7

Where can I find the setting of USB traffic as well as reset camera.

I did not check the Universal time and the time it prints on the file name is UTC F..k.

This program has so many settings that one need a light year in order to understand it and the tutorial videos are ... well better I say nothing ...

Nothing in this software is intuitive ...

I can not even change the language of the program to English. My Windows is Spanish and I guess that is why FireCapture assumes I want a Spanish version of FireCapture. Honestly I do not know who tranlated it into Spanish but I do not understand that Spanish ... :shock:

A lot of things seem to be hidden very very deep somewhere ...

END of RANT


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Re: 1st light NHSA SHG image in H-alpha

Post by PDB »

Rainer,

in the camera "control" window there is a function key "more". That will bring up a dialog box that shows all setting you can change for a camera (its camera dependant) You can fix some settings to the main control window by placing a tick mark in the box next to the "eye" icon.

Reset: there is a powerbutton icon, next to the image window. There you can restart your camera or choose another one (that usually does not work)

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Re: 1st light NHSA SHG image in H-alpha

Post by PDB »

can not even change the language of the program to English. My Windows is Spanish and I guess that is why FireCapture assumes I want a Spanish version of FireCapture. Honestly I do not know who tranlated it into Spanish but I do not understand that Spanish ... :shock:
there is a way, I once had to ask Torsten how to do it (needed English screenshots for my SSM documentation)

You will have to edit the file start.bat in the FC installation folder. insert "-Duser.language=en" in the line beginning with start.
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P


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Re: 1st light NHSA SHG image in H-alpha

Post by rsfoto »

PDB wrote: Tue Jan 31, 2023 8:04 pm
can not even change the language of the program to English. My Windows is Spanish and I guess that is why FireCapture assumes I want a Spanish version of FireCapture. Honestly I do not know who tranlated it into Spanish but I do not understand that Spanish ... :shock:
there is a way, I once had to ask Torsten how to do it (needed English screenshots for my SSM documentation)

You will have to edit the file start.bat in the FC installation folder. insert "-Duser.language=en" in the line beginning with start.

2019-01-28_11h48_05.png

P
I am not religious but

JESUS CHRIST

any decent program has in the preferences settings a possibility for language change ...


:evil:


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Re: 1st light NHSA SHG image in H-alpha

Post by rsfoto »

PDB wrote: Tue Jan 31, 2023 8:04 pm
can not even change the language of the program to English. My Windows is Spanish and I guess that is why FireCapture assumes I want a Spanish version of FireCapture. Honestly I do not know who tranlated it into Spanish but I do not understand that Spanish ... :shock:
there is a way, I once had to ask Torsten how to do it (needed English screenshots for my SSM documentation)

You will have to edit the file start.bat in the FC installation folder. insert "-Duser.language=en" in the line beginning with start.

2019-01-28_11h48_05.png

P
Hi Paul,

Thank you very much.

Why does a programmer assume that a user with a XXX language system wants the program to be in the XXX system language ...

For me the whole Astronomy Enchilada works best in English even being a native German and a good Spanish speaker ...

ROFLMAO


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Re: 1st light NHSA SHG image in H-alpha

Post by PDB »

Because "people" ask for that. I remember when FC was English only.

Why don't you change the Windows Language to English? Solves most of these problems.

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Re: 1st light NHSA SHG image in H-alpha

Post by rsfoto »

PDB wrote: Tue Jan 31, 2023 9:12 pm Because "people" ask for that. I remember when FC was English only.

Why don't you change the Windows Language to English? Solves most of these problems.

Paul
I do not change it to English because my Windows is not Multi language capable because I already tried to install other languages into my Windows and it does not allow it ...

That is why :lol: :lol: :lol:


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Re: 1st light NHSA SHG image in H-alpha

Post by PDB »

Mine did without any problems (and it is a "home edition")


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Re: 1st light NHSA SHG image in H-alpha

Post by rsfoto »

Hi Everybody and especially Paul,

I apologize for having lost my temper and patience.

I tried to change again the System language and this time it was possible.

Thank you very very very much Paul. I owe you some beer, can it be some bottles of Chimay ?


;)


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Re: 1st light NHSA SHG image in H-alpha

Post by PDB »

would ne nice but I am not allowed to drink that anymore (doctors orders)

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Re: 1st light NHSA SHG image in H-alpha

Post by DeepSolar64 »

German beer Rainer. Weihenstephaner!! :-)


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Re: 1st light NHSA SHG image in H-alpha

Post by rsfoto »

DeepSolar64 wrote: Wed Feb 01, 2023 4:50 pm German beer Rainer. Weihenstephaner!! :-)
Hi James,

If you get the opportunity you should try at least once a Bottle of Chimay blonde beer ...

You will not regret it ...


regards Rainer

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San Luis Potosi Mexico

North 22° West 101°
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Re: 1st light NHSA SHG image in H-alpha

Post by DeepSolar64 »

Thanks for the advice, Rainer. Germans really know their beer. I'll have to see if I can find it.

James


Lunt 8x32 SUNoculars
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado SolarMax II 90 DS
Meade Coronado AZS Alt/Az Mount
Astro-Tech AT72EDII with Altair solar wedge
Celestron NexStar 102GT with Altair solar wedge
Losmandy AZ8 Alt/Az Mount
Sky-Watcher AZGTI Alt-Az GoTo mount
Cameras: ZWO ASI178MM, PGR Grasshopper, PGR Flea
Lunt, Coronado, TeleVue, Orion and Meade eyepieces

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Re: 1st light NHSA SHG image in H-alpha

Post by rsfoto »

Hi,

"... and the Waltz goes on" ... https://www.youtube.com/watch?v=vSlKKC_H9Qw

Yesterday I finished another focuser for the telescope as there is a 100% need for it. This is a stripped down ZWO EAF focuser which I took out of the original housing as it is too big in order to be able to fit it where it is now.

Telescope focuser ZWO EAF
SolEx_M_3.jpg
SolEx_M_3.jpg (1.04 MiB) Viewed 1102 times
NHSA custom drivers for Grating and camera focus
SolEx_M_1.jpg
SolEx_M_1.jpg (910.71 KiB) Viewed 1102 times
SolEx_M_2.jpg
SolEx_M_2.jpg (951.96 KiB) Viewed 1102 times

Now I need to solve some mount trouble in regard to slewing or I will use the simple solution and go in front of the Sun, stop the tracking and let the Sun cross the Sol'Ex and record +.ser fiels at low speed. This has worked best today.

I was able to test it after having gone through the checklist if everything works. Now I have there 3 ZWO EAF focusers as well as 2 NHSA drivers for the etalons as well as Grating and camera focus on the Sol'Ex :shock:

Here a more or less round Sun using Sun moving in front of telescope. Again also some trouble of USB speed which I also have to solve even having bought a new activew USB 3.0 cable.

Lots of work in the passed days but improving sharpness after being able to focus the telescope too.

_SHG_NHSA__17_01_57_diskHC_MountOff.jpg
_SHG_NHSA__17_01_57_diskHC_MountOff.jpg (628.12 KiB) Viewed 1102 times


regards Rainer

Observatorio Real de 14
San Luis Potosi Mexico

North 22° West 101°
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DeepSolar64
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Re: 1st light NHSA SHG image in H-alpha

Post by DeepSolar64 »

You are getting better Rainer. That filament really stands out. Looks good!!

And with the SHG you can apply your skills to CaK!!


Lunt 8x32 SUNoculars
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado SolarMax II 90 DS
Meade Coronado AZS Alt/Az Mount
Astro-Tech AT72EDII with Altair solar wedge
Celestron NexStar 102GT with Altair solar wedge
Losmandy AZ8 Alt/Az Mount
Sky-Watcher AZGTI Alt-Az GoTo mount
Cameras: ZWO ASI178MM, PGR Grasshopper, PGR Flea
Lunt, Coronado, TeleVue, Orion and Meade eyepieces

Image Visual Observer
" Way more fun to see it! "
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