Jupiter Ganymede 3/4 Sept

[MarkS]

Yet another process of the data I took on the night of 3rd Sept - this time not an animation!

This is 1200 best frames taken from the Philips SPC900 at 5 frames/sec on the Celestron C11 with x2 Barlow.
I used the drizzle option in Registax to increase the image size x1.5.  The final stack (a single point stack) was then deconvolved with a Gaussian function.

Maybe not as good as using a Skynyx camera on a C14 but it gives them a run for their money!

Ganymede has suffered a bit and there's a bit of orange rind at the poles but apart from that I'm pretty pleased with this.

[Rocket Pooch]

Hi Mark,

Thats really cool, have you tried the image through a high pass filter in photoshop, it would bring out a little more detail without adding any noice, you could also get the edge and colour saturation lookling a little better.

But its a fantastic image, wish I had a C11 or C14 I'd have a bash.

Chris

[Mac]

my 10" is sitting here at the moment if you want to borrow it.
Its got the dovetail for the EQ6.

[Fay]

Well, MArk, what can I say, MAGIC!

[MarkS]

Thanks for your comments on this.  For those who are interested, here is one of the better single video frames from the AVI file - all I've done is to flip it left/right and colour balance it:



Here is the final raw stack of 1200 frames - drizzled in Registax to a factor of 1.5 and converted to jpg for display here - no wavelets applied:



If you want to play with the raw stack and improve on my processing then you need the TIF which is here:
http://www.markshelley.co.uk/Astronomy/2010/jup3sepv3rawstack.tif

Mark

[Tony G]

Mark,

Going through the astrophotography section it seems like you were very busy, when we were away.
The images are brilliant, and as for the 3D, you have done a great job, out of this world so to speak.
The planets seem to have been given a miss lately, along with the moon, but you have shown in all these images, just what the likes of a webcam and a lovely gas giant can produce.

Great work.

Tony G

[Whitters]

Lovely image Mark.

[MarkS]

I did a complete reprocess of this at the weekend using Registax 5.1 and have just managed to tease out just a tiny bit more detail.  This time I used 1.5x Lanczos resampling instead of 1.5x drizzle.  But the main trick was to use prefiltering at the optimisation stage.  For those interested, the filter used was:
0 1 0
0 2 0
0 1 0

This made is less likely for Registax to align on the noise instead of on the surface detail.

[mickw]

That's great, a lot more detail and Ganymede looks a lot less fuzzy

[Rocket Pooch]

Mark,

If you put your hands abround your laptop and squeeze a little harder you might get something more out of the AVI.

Chris

P.S. It's very good.

[Tony G]

Lovely!

Tony G

[RobertM]

Yep, have to agree, it's a really wonderful image.  Could you improve Ganymede by stacking that seperately ?, after all it looks like the orbital motion that's causing the blur - just a thought!

Robert

[MarkS]

I had another go at this last night and managed to get slightly more detail but I'm struggling with Registax - I think a combination of frame noise and AVI compression artifacts is still upsetting Registax's optimisation stage even using the low pass prefilter.  Watching the optimisation in progress, it is blatantly obvious that it is not aligning surface features properly.

So I really need a cleaner and uncompressed avi stream.  I'm seriously contemplating buying a colour DMK camera ...

[Rocket Pooch]

Right, here's a tip, and its a nasty one, but your the man for the job.

Go through each frame manually and select the good ones then stack them.

[Mac]

Go through each frame manually and select the good ones  then stack them.

cant be that many .

It was only 5 fps, and you only took, about 5 hours of data.

5*60*60*5

90`000 frames 

shouldn't take long.

See you in about 3 years.
Mac.