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Rev 203

Ian R View Member Profile Find Member's Posts	Posted on: Apr 16 2014, 12:32 AM
Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437	I have to say that Val did a great job of employing this composite for outreach purposes, disseminating it via the likes of Facebook and Twitter to a very positive reaction.
	Forum: Cassini's ongoing mission and raw images · Post Preview: #209024 · Replies: 4 · Views: 13839

Water plumes over Europa

Ian R View Member Profile Find Member's Posts	Posted on: Feb 27 2014, 05:53 PM
Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437	I'm glad to hear that Phil. Makes me wonder how they managed to tease out a putative plume out of this dataset.
	Forum: Jupiter · Post Preview: #207906 · Replies: 131 · Views: 207410

Rev 201 and T98

Ian R View Member Profile Find Member's Posts	Posted on: Feb 27 2014, 04:30 PM
Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437	Well, I guess it must be considered a 'full' lake now, having received the official name of 'Müggel Lacus' (as opposed to Lacuna).
	Forum: Titan · Post Preview: #207900 · Replies: 21 · Views: 22000

Water plumes over Europa

Ian R View Member Profile Find Member's Posts	Posted on: Feb 27 2014, 04:18 PM
Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437	QUOTE (Phil Stooke @ Feb 27 2014, 02:40 PM) Sky & Telescope, Jan. 1983, p. 15: Allan Cook (Harvard-Smithsonian) - in a post-flyby Voyager 1 image looking back at a crescent Europa, a bright patch at the southern cusp and a faint plume 100-150 km high. Not seen in other images. This post-flyby Voyager image of Europa got me excited: http://pds-rings.seti.org/browse/VGISS_5xx...649524_full.jpg Until I realized it was just an unfortunately situated speck of dust on the camera lens: http://pds-rings.seti.org/browse/VGISS_5xx...649518_full.jpg
	Forum: Jupiter · Post Preview: #207899 · Replies: 131 · Views: 207410

Water plumes over Europa

Ian R

Posted on: Feb 27 2014, 04:09 PM

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QUOTE (Phil Stooke @ Feb 27 2014, 02:40 PM)

IAU Colloquium 77 (Natural Satellites), Brown U. Preprint #A546 (July 1983, p. 22): A. F. Cook (Hertzberg Inst. and Harvard-Smithsonian) plus Paul Helfenstein (then at Brown): six Voyager 2 images taken during approach show a diffuse plume, not seen in similar Ganymede images. Best view is image 0391J2-002.

Image 0391J2-002, aka c2060558, does show a 'plume', but it's likely a residual artifact of the reseaux dot removal process; none of the raw images in this sequence appear to show any plumes, tenuous or otherwise:

c2060558 raw:

Forum: Jupiter · Post Preview: #207898 · Replies: 131 · Views: 207410

Rev 201 and T98

Ian R

Posted on: Feb 4 2014, 04:46 PM

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This is a rather crude, but reasonably effective attempt at coaxing out detail in the northernmost latitudes, especially just south of the bright evaporite deposits:

Forum: Titan · Post Preview: #207141 · Replies: 21 · Views: 22000

Rev 201 and T98

Ian R

Posted on: Feb 1 2014, 12:37 PM

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And here's my own rendering of the three CB3 frames:

Thanks to the wonders of Celestia, I was able to animate the flyby, and point out some of the primary science objectives:

http://www.youtube.com/watch?v=1i1obyesxFs

Forum: Titan · Post Preview: #207053 · Replies: 21 · Views: 22000

Rev 200

Ian R

Posted on: Jan 15 2014, 10:59 AM

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And just for completeness, this is my attempt at converting a storm-watch observation, from earlier in the orbit, to natural color:

Forum: Cassini's ongoing mission and raw images · Post Preview: #206429 · Replies: 1 · Views: 7072

Rev 200

Ian R

Posted on: Jan 15 2014, 10:43 AM

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A couple of recent composites, starting with this picturesque view of Saturn:

Filters used: Red: CB3 / MT2, Green: Synthetic, Blue: BLU

103 wide-angle, clear filtered frames were used to produce this 'spoke-watch' movie (best seen in 720p HD):

http://www.youtube.com/watch?v=CAthQZBuGeI

Forum: Cassini's ongoing mission and raw images · Post Preview: #206428 · Replies: 1 · Views: 7072

Rev200: Dec 17 '13 — Jan 19 '14

Ian R View Member Profile Find Member's Posts	Posted on: Jan 10 2014, 03:27 PM
Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437	Thanks guys!
	Forum: Titan · Post Preview: #206280 · Replies: 9 · Views: 8472

Rev200: Dec 17 '13 — Jan 19 '14

Ian R View Member Profile Find Member's Posts	Posted on: Jan 9 2014, 11:58 PM
Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437	This video is an attempt to 'animate' the frames taken by ISS during this flyby: http://www.youtube.com/watch?v=GQyv_DRrqT4 And at the end, I've included some processed highlights from T-97.
	Forum: Titan · Post Preview: #206257 · Replies: 9 · Views: 8472

Rev200: Dec 17 '13 — Jan 19 '14

Ian R View Member Profile Find Member's Posts	Posted on: Jan 5 2014, 04:43 AM
Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437	Very nice, Val The haze layers stand out really prominently in that composite, I must say.
	Forum: Titan · Post Preview: #206122 · Replies: 9 · Views: 8472

Rev200: Dec 17 '13 — Jan 19 '14

Ian R

Posted on: Jan 4 2014, 04:36 AM

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An inbound, two-footprint mosaic of Titan's northern wetlands, taken on New Year's Eve from a distance of 449,858 miles:

Forum: Titan · Post Preview: #206089 · Replies: 9 · Views: 8472

The Kitchen Junk Drawer

Ian R

Posted on: Dec 24 2013, 03:19 PM

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Actually, on this occasion the Hasselblad wasn't on the chest-mount; Jack was holding it in his right hand, kneeling down to get Gene, the flag, and Earth in the frame.

Forum: Chit Chat · Post Preview: #205878 · Replies: 123 · Views: 155285

The Kitchen Junk Drawer

Ian R View Member Profile Find Member's Posts	Posted on: Dec 24 2013, 03:03 PM
Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437	This is ridiculously off-topic, but the Hasselblads were chest-mounted, so it's only to be expected that the visor reflection doesn't appear to show Jack taking this picture (the TV footage proves he was indeed the photographer).
	Forum: Chit Chat · Post Preview: #205877 · Replies: 123 · Views: 155285

Chang'e 3 landing and first lunar day of operations

Ian R View Member Profile Find Member's Posts	Posted on: Dec 14 2013, 01:20 PM
Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437	GIF landing sequence: http://postimg.org/image/l08n4q135/
	Forum: Chang'e program · Post Preview: #205476 · Replies: 305 · Views: 417986

Rev 199: Nov. 7- Dec. 17 '13

Ian R

Posted on: Nov 25 2013, 05:28 AM

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Great stuff, Val

Here's my attempt to enhance the haze in a RGB composite using the UV channel:

Forum: Titan · Post Preview: #204703 · Replies: 21 · Views: 17302

Rev198: Saturn wide-angle mosaic

Ian R View Member Profile Find Member's Posts	Posted on: Nov 11 2013, 12:34 AM
Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437	Thanks! All I did was tween the original 58 frame sequence from 8fps to 16fps.
	Forum: Cassini's ongoing mission and raw images · Post Preview: #204445 · Replies: 38 · Views: 155703

Rev198: Saturn wide-angle mosaic

Ian R View Member Profile Find Member's Posts	Posted on: Nov 10 2013, 06:51 AM
Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437	Taking the thread on to less controversial ground, here are a couple of rings movies; the second in particular shows two, maybe three, ghostly 'blink-and-you'll-miss-them' spokes, plus the eccentric Huygens Ringlet stands out by virtue of its inherent 'wobble': The Rotating Rings of Saturn (October 19, 2013) http://www.youtube.com/v/42NRH-LNonQ&hd=1 The Elusive Spokes of Saturn (October 22, 2013) http://www.youtube.com/v/O4wn81eI2lw&hd=1
	Forum: Cassini's ongoing mission and raw images · Post Preview: #204432 · Replies: 38 · Views: 155703

Lakes in the limelight

Ian R View Member Profile Find Member's Posts	Posted on: Oct 23 2013, 09:36 PM
Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437	Fantastic work Jason!
	Forum: Titan · Post Preview: #204038 · Replies: 166 · Views: 222433

Rev198: Saturn wide-angle mosaic

Ian R View Member Profile Find Member's Posts	Posted on: Oct 21 2013, 08:07 PM
Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437	QUOTE (ugordan @ Oct 17 2013, 11:52 AM) Ian, I simply assumed the original data used 12bit encoding mode used so the JPEG DNs are basically linear (a reasonable, but not 100% accurate assumption when uncalibrated images are concerned) as it looked that way to me and the color profile I use in Photoshop (and the one I use for calibrated data that is linearized by default) automatically adjusts that to the sRGB 2.2 display gamma. Gordan, Many thanks for the explanation: the first thing I indeed noticed was the difference in gamma between your composite and my attempt at the clear-filtered mosaic. With regards to the JPEG DNs, how would you tackle a raw you suspect of being an LUT-converted 8-bit image? Trial and error? Or is there a way to approximately reverse the conversion? Thanks again.
	Forum: Cassini's ongoing mission and raw images · Post Preview: #203969 · Replies: 38 · Views: 155703

Official UMSF Bad Jokes Thread

Ian R View Member Profile Find Member's Posts	Posted on: Oct 21 2013, 07:35 PM
Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437	BA-DUM TISH Someone call a taxi for Phil!
	Forum: Chit Chat · Post Preview: #203968 · Replies: 69 · Views: 77110

Official UMSF Bad Jokes Thread

Ian R View Member Profile Find Member's Posts	Posted on: Oct 21 2013, 01:12 AM
Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437	Why can I only think of rude ones?
	Forum: Chit Chat · Post Preview: #203952 · Replies: 69 · Views: 77110

Rev198: Saturn wide-angle mosaic

Ian R View Member Profile Find Member's Posts	Posted on: Oct 17 2013, 09:36 AM
Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437	Amazing Gordan! If you don't mind me picking your brain, just how do you go about combining the night-side hemisphere with the sunlit part of the disc? HDR merging or your own special sauce? This was my attempt at working with the Clear-filtered frames: http://postimg.org/image/w3qnpzhtl/full/
	Forum: Cassini's ongoing mission and raw images · Post Preview: #203844 · Replies: 38 · Views: 155703