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New map of Phobos
Phil Stooke
post Mar 10 2010, 10:25 PM
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I'm starting a thread here in Mars Express for a new map of Phobos, because most of it will be based on MEX images.

This is the first section. It's the north pole, centred on the pole, out to 50 degrees north at the edge, in azimuthal equidistant projection (i.e. the parallels of latitude are equally spaced, unlike in a stereographic projection where they would get further apart away from the pole). This image is made of Viking, Mars Express and MRO images. Below it I show what the previous best map looked like, much more compressed to save space here. That is just Viking data, compiled by Damon Simonelli et al. at Cornell in the 1990s. The actual mapping is done at twice this scale.

Phil

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elakdawalla
post Mar 10 2010, 10:27 PM
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Wow, Phil, the improvement's fantastic. I can't wait to see what's next.


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Phil Stooke
post Mar 15 2010, 07:04 PM
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Here's the south pole. This is only a small improvement over the earlier one as we don't have extremely high resolution images in the south.

Phil

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Phil Stooke
post Mar 16 2010, 04:55 PM
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Taking the north and south polar sections and adding them to the cylindrical map, we get this. Next step, I'll fill in the gap starting in the middle. I'm working at 4 times this resolution.

Phil

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Hungry4info
post Mar 16 2010, 06:42 PM
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Wow that looks great even in that state!


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Adonis
post Mar 18 2010, 07:36 PM
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¿Is there any DTM model of Phobos available with more accuracy than the previous based on Viking data, based on the more accurate data from Mars Express imaging data, obtained in 2008 and from these recent fly-bys (and maybe from MRO data?.

If yes, ¿where I can find that info?

Thanks
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Phil Stooke
post Mar 18 2010, 09:47 PM
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People are working on these things but I don't think anything is released yet.

Phil


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Phil Stooke
post Mar 19 2010, 02:11 PM
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I forgot about the new atlas of Phobos and shape model from DLR in Germany - see it here. So yes, there is a new shape model.

Phil

http://europlanet.dlr.de/node/index.php?id=214


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Phil Stooke
post Mar 19 2010, 08:56 PM
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Next step in the Phobos mosaic. Here's the original (middle part of the global cylindrical mosaic posted above)...

Attached Image


and here's the new version with a HiRISE and a HRSC image added:

Attached Image


Phil


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Phil Stooke
post Mar 31 2010, 03:06 PM
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Latest version of the Phobos map:

Attached Image


Phil


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Phil Stooke
post Apr 7 2010, 09:02 PM
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I've finished the central panel of the big new Phobos map. Here it is at 25% scale (and heavily compressed)

Phil

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Ian R
post Apr 8 2010, 10:14 AM
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It looks like a real labour of love, Phil.

And boy do some of those grooves look like heavilly eroded uber-crater chains...


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Hungry4info
post Apr 8 2010, 11:12 AM
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Interesting flipping back and forth between the images on post #11 and post #4.


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Phil Stooke
post Apr 16 2010, 08:17 PM
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Flip some more! Here's the next section of the equatorial map. I've already done more than half of it.

Original version with my sections at the edges to ensure a perfect match:

Attached Image


New version, with an L-shaped gap at the bottom:

Attached Image



Much of the new map is from Mars Express, but here quite a lot is still Viking. However, my Viking mosaics are higher quality than the originals which went into the original map. I have also corrected a lot of bad seams in the old mosaic.

Phil


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Hungry4info
post Apr 16 2010, 10:17 PM
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That really is pretty cool. Do you know yet if you'll add some MRO imagery?


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