Global True Color View Of Venus? |
Global True Color View Of Venus? |
Aug 8 2005, 06:53 PM
Post
#1
|
|
Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
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? -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
|
|
|
Jun 5 2009, 11:08 AM
Post
#2
|
|
Senior Member Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345 |
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?"] -------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
|
|
|
Jun 5 2009, 01:51 PM
Post
#3
|
|
Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
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.
-------------------- |
|
|
Lo-Fi Version | Time is now: 27th September 2024 - 03:19 AM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |