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Global True Color View Of Venus?
elakdawalla
post Aug 8 2005, 06:53 PM
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I'm creating a website with views of the worlds of the solar system, to scale with each other (it'll march up and down the few orders of magnitude necessary), and I am having a terrible time finding a global view of Venus to include in it that fits the criteria I'm trying to apply. To the extent possible, I am searching for:

- Full-disk, global view
- Minimum phase angle available
- Approximate true color, as would be perceived by a human observing the globe from space

For Venus, the only global views I am finding are either based on Magellan data (radar views, nothing like what a human would see) or are colorized ultraviolet views (which greatly overemphasize the visibility of cloud patterns in the Venusian atmosphere). I've seen the lovely partial global view of Venus on Don Mitchell's website -- that's the sort of thing I'm looking for, but I need a full disk. Does anybody have any suggestions? Anybody done any work with Mariner 10 or Galileo data that produces a nice, realistic view?


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Juramike
post Jun 5 2009, 11:08 AM
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Personally, I don't like the wavelength limitations of visible light. Hyperspectal imaging, false color imaging, topgraphical coloration, mineral maps based on diagnostic bands - all these things make comparisons and contrasting of features easier (and pretty!).

But I totally agree with the points above: if you are going to show false color or enhanced images, it is important to put a warning lable that they are false color views. And if you are going to show a set of comparison images of planets, they should be all treated similar. If you strip the atmosphere and clouds off one of the terrestrial planets (like Venus), you need to do it for the other similar planets.

If you are only going to show the upper atmospheric structure of Venus, Earth's also needs to be shown for a comparison (but obviously not using the the same technique). [How are they similar? How are they different? Why?]

I always thought the perfect kids book would show a topographic representation of the terrestrial planets for comparison:
["Gee, without water, Earth still has ocean basins and continents....how come the other worlds don't have this? And what's going on with that ridge going down the Atlantic basin? How come Mars has those deep holes? Why are parts of the Moon so smooth?"]


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tedstryk
post Jun 5 2009, 01:51 PM
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I would say that there is a difference between false color imaging that shows, say, infrared wavelengths, so that the colors contain real information that can't be conveyed in a "true" color image and images that are simply colorized to look "cool." Juramike, I fully agree on the visible light issue. Our eyes evolved for our purposes here on earth, but there is so much to be gained from adding non-visible wavelengths. That is why I really prefer to call , for example, a color-shifted Voyager image G-V-UV color instead of "false" color. It isn't entirely false, in the sense that the colors really do mean something.


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- elakdawalla   Global True Color View Of Venus?   Aug 8 2005, 06:53 PM
- - BruceMoomaw   You might look into the images from Pioneer 12...   Aug 8 2005, 06:58 PM
|- - tedstryk   Yes, but I don't think it took multiband image...   Aug 8 2005, 10:09 PM
- - JRehling   QUOTE (elakdawalla @ Aug 8 2005, 11:53 AM)I...   Aug 8 2005, 09:02 PM
- - 4th rock from the sun   My best attempts, using Mariner 10 "clear...   Aug 8 2005, 11:48 PM
|- - elakdawalla   QUOTE (4th rock from the sun @ Aug 8 2005, 04...   Aug 10 2005, 03:39 AM
- - 4th rock from the sun   Ok, here's a Venus atmospheric profile. It s...   Aug 8 2005, 11:55 PM
- - 4th rock from the sun   Check my page http://www.astrosurf.com/nunes/explo...   Aug 10 2005, 12:44 PM
- - 4th rock from the sun   OK, here's all the data I have. This atmosph...   Aug 10 2005, 07:10 PM
- - planet_guy   If you are interested in the surface stuff done by...   Aug 25 2005, 01:17 PM
|- - algorimancer   QUOTE (planet_guy @ Aug 25 2005, 08:17 AM)If ...   Aug 26 2005, 01:09 PM
|- - tedstryk   QUOTE (planet_guy @ Aug 25 2005, 01:17 PM)If ...   Aug 26 2005, 02:00 PM
- - planet_guy   well the 16km/pix are using the 'holes' t...   Aug 26 2005, 03:18 PM
|- - tedstryk   QUOTE (planet_guy @ Aug 26 2005, 03:18 PM)wel...   Aug 26 2005, 03:25 PM
|- - JRehling   QUOTE (tedstryk @ Aug 26 2005, 08:25 AM)Sound...   Aug 26 2005, 03:50 PM
- - planet_guy   trust me.. I'm also hoping the predictions are...   Aug 26 2005, 03:28 PM
- - BruceMoomaw   I promised fully 2 months back to dig up whatever ...   Aug 29 2005, 12:39 AM
- - Tayfun Íner   It is unbelievable that Venus is the nearest plane...   Dec 4 2005, 06:41 PM
|- - JRehling   QUOTE (Tayfun Íner @ Dec 4 2005, 10:41 AM)It ...   Dec 5 2005, 02:03 AM
|- - DonPMitchell   There is a spectral albedo for Venus. That can be...   May 5 2006, 08:49 PM
- - JRehling   QUOTE (elakdawalla @ Aug 8 2005, 11:53 AM...   Oct 12 2007, 10:32 PM
- - scalbers   Well, I guess this wouldn't be true color, yet...   Oct 12 2007, 10:52 PM
- - Gladstoner   .   Jan 4 2008, 09:05 AM
- - 4th rock from the sun   Hi all, I've updated my webpage with some Ven...   Dec 29 2008, 01:08 PM
|- - ugordan   I've been messing around with the MESSENGER ca...   Jun 1 2009, 06:48 PM
|- - 4th rock from the sun   QUOTE (ugordan @ Jun 1 2009, 06:48 PM) .....   Jun 2 2009, 09:55 AM
|- - ugordan   QUOTE (4th rock from the sun @ Jun 2 2009, 11...   Jun 2 2009, 10:15 AM
- - Stu   Absolutely beautiful images, thanks for posting th...   Jun 1 2009, 08:48 PM
|- - ugordan   Sure, no problem at all, Stu. Glad you like them.   Jun 1 2009, 09:08 PM
- - Stu   Wow, there really would be b****r all to see if yo...   Jun 2 2009, 10:35 AM
|- - ugordan   Yep, and every time I see a montage of all solar s...   Jun 2 2009, 10:43 AM
|- - tedstryk   QUOTE (ugordan @ Jun 2 2009, 10:43 AM) Ye...   Jun 4 2009, 09:42 PM
||- - ngunn   QUOTE (tedstryk @ Jun 4 2009, 10:42 PM) c...   Jun 4 2009, 10:18 PM
|- - Stu   QUOTE (ugordan @ Jun 2 2009, 11:43 AM) Ye...   Jun 4 2009, 11:21 PM
|- - tedstryk   QUOTE (Stu @ Jun 5 2009, 12:21 AM) Every ...   Jun 5 2009, 10:21 AM
- - Juramike   Personally, I don't like the wavelength limita...   Jun 5 2009, 11:08 AM
|- - tedstryk   I would say that there is a difference between fal...   Jun 5 2009, 01:51 PM
- - Stu   The problem I encounter is that editors want to us...   Jun 5 2009, 01:58 PM
|- - tedstryk   I agree, but I still think that showing the Venusi...   Jun 5 2009, 04:41 PM
- - Stu   It's this image I have had to fight to stop ed...   Jun 5 2009, 05:40 PM
|- - tedstryk   Not only is the color bad, but that is a Mariner 1...   Jun 5 2009, 05:44 PM
- - Stu   Okay, but you get the idea, right? Editors can be ...   Jun 5 2009, 05:52 PM
|- - tedstryk   Yes, I get the idea. However, to me, the fact tha...   Jun 6 2009, 10:16 AM
- - brellis   When's Google Venus gonna be up and running?   Jun 5 2009, 08:42 PM
- - scalbers   Is this web page with a Venus image showing some r...   Oct 15 2010, 09:12 PM
|- - CJSF   QUOTE (scalbers @ Oct 15 2010, 05:12 PM) ...   Oct 16 2010, 12:26 AM
|- - scalbers   QUOTE (CJSF @ Oct 16 2010, 12:26 AM) I ag...   Oct 16 2010, 05:53 PM
|- - ugordan   It's not merely about color, it's about co...   Oct 16 2010, 06:01 PM
- - machi   It looks like old UV image from Pioneer Venus. I ...   Oct 15 2010, 09:26 PM
- - 4th rock from the sun   Here's my Pioneer Venus image galery: http://w...   Oct 16 2010, 03:33 PM
- - Phil Stooke   Nice set of pictures! The last image on your ...   Oct 16 2010, 04:18 PM
- - scalbers   Yes indeed the actual contrast is much more subtle...   Oct 16 2010, 06:06 PM
|- - 4th rock from the sun   QUOTE (scalbers @ Oct 16 2010, 07:06 PM) ...   Oct 17 2010, 01:26 PM
|- - scalbers   QUOTE (4th rock from the sun @ Oct 17 2010, 0...   Oct 17 2010, 08:59 PM
- - EDG   Has anyone actually tried to make a true-colour ma...   Oct 17 2010, 12:52 AM
- - nprev   I don't know how you could ever make a 'tr...   Oct 17 2010, 01:37 AM
|- - EDG   QUOTE (nprev @ Oct 16 2010, 06:37 PM) I d...   Oct 17 2010, 07:02 PM
|- - tedstryk   How on earth would that be any less simulated than...   Oct 17 2010, 07:45 PM
|- - EDG   QUOTE (tedstryk @ Oct 17 2010, 11:45 AM) ...   Oct 17 2010, 09:20 PM
- - JohnVV   QUOTE Has anyone actually tried to make a true-col...   Oct 18 2010, 02:53 AM


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