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Stereo Home Plate!, long-baseline 3D visualization
dilo
post Sep 16 2005, 06:28 AM
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I used Sol583 and Sol595 PanCam l256 color images to obtain this nice crossed eyed South view:
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This is a 3x stretch enlarged detail of HomePlate (a little bit noisy but showing 3D structure):
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I will make soon analglyphed versions... (maybe someone else before me! wink.gif )


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algorimancer
post Oct 10 2005, 03:08 PM
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Dilo, I hope you don't mind, but I overlaid some approximate measurements to your very nice stereo pic.

Based upon an overhead image with known scaling, I estimate that home plate is very nearly 100 meters across from our current perspective. In the following image, I have overlaid that 100 meter distance, then based upon pixel ratios have added a ten meter vertical and a two meter vertical line to the right. All measurements are very approximate, but ought to be within 10%.

This gives me a much better sense of the scale of home plate. If ~2 meter people were wandering around on it they would be clearly visible from this perspective, and what appears to be the exposed section of the plate material on the right seems also on the order of 2 meters thick. The "cinder cone" seems no more than 15 meters high.
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algorimancer
post Oct 11 2005, 04:29 PM
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Again, taking liberties with Dilo's image (sorry)... the boxed object looks a lot like an eroded igneous dike (for terrestrial example, see here: http://www.decadevolcano.net/photos/santor...rini_20825.jpg).

What I seem to see is a narrow vertical wall of basalt, perhaps 1-3 meters high. The base of the wall seems to form a closed polygon with at least 3 sides (that's interesting), with the proximal wall about 25 meters long. I don't see any sign of it extending beyond this particular object, and satellite pictures lack the resolution to show it clearly.

After visiting Home Plate, this strikes me as an intriguing target.
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Tman
post Oct 11 2005, 05:38 PM
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Great to imagine the Rover (230wide x 165long x 155high) driving over the plate smile.gif don't think yet it's so big.


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algorimancer
post Oct 12 2005, 03:48 PM
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Better measurements, better numbers. Turns out my earlier scale for Home Plate was off by nearly a factor of 2. This time I used the cProto image from here http://www.msss.com/moc_gallery/r22_s04/im...2/S0200972.html as the source of the scale, clipped out the region of Home Plate, doubled the size, and overlaid correct scale and labels (below).

Then I went back to Dilo's image, corrected the scale on Home Plate (it's about 180 meters accross in this image), and likewise added scale to the presumed dike, plus added more realistic 2 meter and 10 meter scales for reference (below).

Considering the overhead perspective, the presumed dike looks a lot more like a crater rim.
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Nix
post Oct 12 2005, 06:46 PM
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Nice to get a good idea of the area. I vote for crater there too.

Nico smile.gif


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