astrosharp
super member
Reged: 06/24/08
Posts: 123
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Hi all,
Here you go. Here's a typical quality AVI sample (Green filter).
Not all at once or my webserver will go down! It's just over 100MB zipped.
Cheers
Ian.
Zip File here
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astrosharp
super member
Reged: 06/24/08
Posts: 123
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Forgot to say, this was recorded at 66 fps so I was stacking about 3600 frames in the green alone!
Cheers
Ian
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ComputerPhysics
super member
Reged: 05/14/09
Posts: 105
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Very good data  . Which equipment did you use?
My processing gives the following result:
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http://computerphysicslab.wordpress.com/
http://www.awesky.com/
MyLPOD
A Galaxy Genesis
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isramirez
Pooh-Bah
Reged: 11/04/05
Posts: 1391
Loc: Mexico City
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Thanks by share Ian!  ...is this video a 9/10 seeing?
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Santel MK9 & MK6
IntesMicro 715
Celestron SCT6 & ONIX80 EDF
Meade SN6 & AR6
HiOptic 6in MakCass.Gregory
DBK + DMK + NexImage + LPI
CG-5 & LXD75 Mounts
many EP's, Barlows and Binoviewers
Great astronomic passion 
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revans
Carpal Tunnel
Reged: 09/26/05
Posts: 1510
Loc: Fitchburg, MA
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Very impressive detail... I was amazed when I finished stacking the individual frames. You say that you captured over 3K frames for the green channel alone? Did you capture in uncompressed Y800 format... or did you use some compression codec? If the format is uncompressed, wouldn't the planet rotate too much when so many frames are collected for each channel... it would take at least a minute to collect the frames for each channel and I had been told that 2 minutes was about the limit for all channels combined. I find that to get a bright enough image even near maximum gain using my 10 inch scope at F24, the shutter speed seems to be the limiting factor rather than the 60 fps setting on my DMK21 camera... am I wrong in this thinking?
Rick
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Rick Evans
http://www.freewebs.com/revans_01420/
"The universe is there for us to see, but it cannot be understood without learning its language -- mathematics." Galileo Galilei
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isramirez
Pooh-Bah
Reged: 11/04/05
Posts: 1391
Loc: Mexico City
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Just watched the video and it is amazing!!!! ...can't not believe you getting that image stability at 66fps 
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Santel MK9 & MK6
IntesMicro 715
Celestron SCT6 & ONIX80 EDF
Meade SN6 & AR6
HiOptic 6in MakCass.Gregory
DBK + DMK + NexImage + LPI
CG-5 & LXD75 Mounts
many EP's, Barlows and Binoviewers
Great astronomic passion
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astrosharp
super member
Reged: 06/24/08
Posts: 123
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Lots of questions:
Kit - C11 plus Skynyx2-0M, Astronomik RGB Filters, f/37
No compression - LuCam Recorder saving AVI files. 50 secs per channel is fine to avoid rotation (align on features).
Yes, I'd say that was 9/10 seeing.
If I get a chance I'll upload a red and a blue.
Regards
Ian.
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Mick Hyde
Pooh-Bah
Reged: 11/22/06
Posts: 1122
Loc: Swindon, UK
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Ooooh aaah, lovely data to play with, thanks.
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Mick.
http://astromick.blogspot.com http://mickhyde.googlepages.com Swindon CSC
Celestron 9.25 XLT, Takahashi SKY-90, Canon EOS 50D, DMK21AF04AS, SKYnyx 2-0M, CGE mount.
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amateur
sage
Reged: 06/15/06
Posts: 300
Loc: The Netherlands
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With my home-grown stacking software, including "seeing correction"
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Mert
Carpal Tunnel
Reged: 08/31/05
Posts: 1785
Loc: Spain, Pamplona
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Yeah, thanks a lot for letting us play with
such nice data!
Gives me an idea how it must be on Barbados
imaging, cool!
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Mert
42º49"N 1º38"W
3" Polarex refractor
6" F12 SW Maksutov,CS2-S
EQ6 + EQMOD 
SPC900NC/DFK21AU04.AS
My web-page don't laugh, I should make it better! 
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revans
Carpal Tunnel
Reged: 09/26/05
Posts: 1510
Loc: Fitchburg, MA
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One last question... At F37 assuming a gamma of 1.0 I would think that to get a sufficiently bright image, even with gain near maximum, your shutter speed is going to be slower than your 66 frame per second capture rate... and this would lead to a longer capture time than 50 seconds per channel. So... is your gamma setting 1.0 or have you increased the gamma in order to keep the shutter speed at least as fast as 1/66 second. Or maybe I have misunderstood some concept here...
Rick
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Rick Evans
http://www.freewebs.com/revans_01420/
"The universe is there for us to see, but it cannot be understood without learning its language -- mathematics." Galileo Galilei
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retina boy
super member
Reged: 11/20/06
Posts: 171
Loc: Bryan, Texas
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Thank you for sharing this raw data Ian. It really helps those of us who have not been able to image from really great locations see what really great data looks like. Many thanks.
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Derek
CPC1100, Astronomik RGB, Skynyx 2-0M
Project: TEC cooled C14
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astrosharp
super member
Reged: 06/24/08
Posts: 123
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Quote:
One last question... At F37 assuming a gamma of 1.0 I would think that to get a sufficiently bright image, even with gain near maximum, your shutter speed is going to be slower than your 66 frame per second capture rate... and this would lead to a longer capture time than 50 seconds per channel. So... is your gamma setting 1.0 or have you increased the gamma in order to keep the shutter speed at least as fast as 1/66 second. Or maybe I have misunderstood some concept here...
Rick
Hi Rick,
Gamma always set on 1.0, no tricks, just 15ms exposure, 66 fps gain up at about 17 on a scale of 24 in LuCam Recorder. I was also working quite often at 33 fps when transparency wasn't quite so good and early on in the sessions when altitude was below 50 degrees.
Ian.
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revans
Carpal Tunnel
Reged: 09/26/05
Posts: 1510
Loc: Fitchburg, MA
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Hmmm... then either Jupiter is much brighter at its higher altitude in Barbados than at its lower altitude for me here in New England... or possibly the Skynyx camera that you are using is much more sensitive than my DMK21 camera. Maybe the latter is the case since it is certainly a much more expensive camera. My experience is that, particularly for the red filter, at F37 I would need to use an exposure of 53 ms and could only collect 950 frames in 50 seconds since the shutter speed becomes the limiting factor, where you are able to collect some 3000 frames in the same time period. At F18 I can collect 3000 frames in 50 seconds since I only need a shutter speed of 15 ms and the frame capture rate of 60 fps is undisturbed by the shutter speed.
Does this sound reasonable to you?
Rick
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Rick Evans
http://www.freewebs.com/revans_01420/
"The universe is there for us to see, but it cannot be understood without learning its language -- mathematics." Galileo Galilei
Edited by revans (09/23/09 06:53 AM)
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zAmbonii
scholastic sledgehammer
Reged: 01/19/08
Posts: 830
Loc: Ypsilanti, MI
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Thanks for linking to the .avi. Really good to see what good data is...I don't think I will *ever* see seeing like that where I live. Anyways, here is what I came up with for processing the data:
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Check out my Astrophotos on Flickr
C6-N 150mm f/5 Newtonian
CG-5 ASGT mount
Canon 300D self modded + IDAS LPS-P2 FF
Meade 70AZ + Meade DSI for autoguiding
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astrosharp
super member
Reged: 06/24/08
Posts: 123
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Rick,
Yes, The SkyNyx is more sensitive than the DMK cameras, and the transparency is often superb in Barbados, combined with 60 degrees and you have all the explanation you need.
Ian
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revans
Carpal Tunnel
Reged: 09/26/05
Posts: 1510
Loc: Fitchburg, MA
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I agree, plus I've been making a sort of stupid mistake... I have Astrodon true balance RGB filters. I didn't realize that they are already IR blocked, and have been using an additional IR block filter which probably dims the image a bit as well. I'll do away with the IR block filter in future.
Rick
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Rick Evans
http://www.freewebs.com/revans_01420/
"The universe is there for us to see, but it cannot be understood without learning its language -- mathematics." Galileo Galilei
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MvZ
sage
Reged: 04/03/07
Posts: 245
Loc: The Netherlands
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Rick,
Don't forget that the SkyNyx has larger pixels than the DMK21 camera!
Imaging at F/37 with the SkyNyx is about the same as imaging with the DMK21 at F/28.
So if you want to compare the sensitivity of the two camera's, you have to take this into account!
Anyways, that is some great data you got there Ian!
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Emil
Webcam Astrophotography - Deepsky & Planetary Images
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skywatch
member
Reged: 02/06/08
Posts: 63
Loc: Ottawa
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Hello,
Here's my attempt. That's good data, alright. I stacked all 500 frames for this. It would be nice to try a colour image. I like to process the combined luminance rather than the individual colours.
-Rolf
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Charlie Hein
Postmaster
Reged: 11/02/03
Posts: 7958
Loc: 26.06.08N, +80.23.08W
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Good stuff!
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"He's dead, Jim - I'll get his wallet, you get his tricorder." - Leonard "Bones" McCoy
Weston CSC:
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RedIrocZ-28
Pooh-Bah
Reged: 09/18/05
Posts: 1175
Loc: Grand Rapids, Michigan
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Finally took a stab at this. All I can say is 
7 seconds? A single 7 second avi file created an image that is 10x better than anything I have ever gotten with even 2 minutes worth of captures.
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brianb11213
Carpal Tunnel
Reged: 02/25/09
Posts: 2076
Loc: 55.215N 6.554W
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Quote:
A single 7 second avi file created an image that is 10x better than anything I have ever gotten with even 2 minutes worth of captures.
Yeah, that's good seeing for you. 
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HANTO
professor emeritus
Reged: 08/24/07
Posts: 599
Loc: Unterallgäu, Bavaria, Germany
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This is it, Ian! Great!
Thank you for sharing your data with us!
The red channel must have been simply awesome, I guess!
Best regards
Torsten
Edited by HANTO (11/07/09 09:38 PM)
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