Radar And Mariner 10, Best possible mapping, pre-Messenger |
Radar And Mariner 10, Best possible mapping, pre-Messenger |
Apr 28 2005, 06:21 PM
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
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Dec 30 2007, 09:13 AM
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Member Group: Members Posts: 568 Joined: 20-April 05 From: Silesia Member No.: 299 |
I recognize that many of you are waiting for new images of Mercury, but you can't also see old images.
Tape MVE_033 Image 091 (29 November 1973) -------------------- Free software for planetary science (including Cassini Image Viewer).
http://members.tripod.com/petermasek/marinerall.html |
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Jan 4 2008, 09:55 PM
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
I have been playing around with some Mariner-10 shots. I experimented with color, but Mariner 10's camera had such a weird filter selection that, when combined with calibration issues, make things really difficult.
Here is a cleaner view of the south polar view I did a while back, both in original form and from a high pass filter. There is a larger mosaic, but since it depends on a heavy amount of reprojection, I decided to stick with the wide angle data, as Mercury's topography makes significant reprojection obvious. Here is the 3rd encounter Discovery Rupes mosaic, with a small gapfill from stacked first-encounter images to fill the sliver between the two lower images. Also, I did a stack of the "Discovery Dome" area using third encounter images. -------------------- |
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Jan 4 2008, 10:41 PM
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
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Jan 4 2008, 10:44 PM
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
True-color is such a relative thing....I think even Messenger stuff might go through a few variations as we have seen in color images from many early missions....the problem is the lack of a standard for subtle balancing work. By the way, if anyone downloaded the image right after I posted it, I posted the wrong file...it has now been corrected.
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Jan 4 2008, 10:57 PM
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
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Jan 5 2008, 12:04 AM
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
What I am trying to say is that it might take a while before images can be calibrated to the point of providing color of the quality of, for example, Cassini images. For the other planets, we at least have good earthbased color data. Mercury images, on the other hand, are so damaged by atmospheric refraction and (in daylight) scattered sunlight that they don't provide much of a reference point. In other words, I can see the color images being produced two years from now looking very different from the ones we will see in the next few weeks.
Incidentally, Mariner 10, while having odd filters, had a great camera, but unfortunately, as has been mentioned before, the camera pointing resembles footage from an drunken camera man. That makes the images very hard to assemble, especially using color. I always wondered why Mark Robinson and his team only produced a color ratio map of a small area. After trying to work with the data, I understand. -------------------- |
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