On the Road Again - volume 8 - Page 13

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Posts: 3465

Reply: 241

PostPosted: May 21, 2011 5:42 PM 

The sol 2603 drive is now over. Based on the drive time I guestimate that it was a 120+ meter drive.

I think I figured out why images are being posted less frequently to Exploratorium.

I noticed that the next drive images for today's drive have already been converted to RAD, EFF and RAT formats as soon as they appeared on the pancam tracking site and all the other images from today's drive are only available as thumbnails.

My guess is that the critical drive images are sent directly to the Earth full format and not relayed through Odyssey ( or MRO? ) and thus are in a different data directory than used by the normal Exploratorium and MER site updates. I further guess that the direct transmission images are only posted when someone on the team manually inserts them into the post.

Anyway, that's my guess.


Posts: xxx

Reply: 242

PostPosted: May 21, 2011 11:32 PM 

I'd like to answer your Q in 237 but I honestly can not stand either the front or rear hazcams...the images mean absolutely nothing to me. Curved bubble or fish-eye lens are a complete aberration-I have never enjoyed them nor see anything of value in them. Ever look at the Venera images from Venus? They came in the same way.....otics. I found a webpage where some good soul applied an algohrythm and straightened those images out to the point they looked like they'd been taken with a 35 mm SLR fitted with a 55 mm lens.

Bill Harris

Posts: 3

Reply: 243

PostPosted: May 22, 2011 6:05 PM 

The two hazcams have their own use/application-- the front hazcam can be used to examine the character of the soil at the front wheels and wheel tracks, much like the old "boot-toe scuff" of the carbon-based geologist at a site.

The fisheye distortion of the hazcams can be corrected by the "lens correction" routine of most image editors, so this is a non-issue.



Posts: 3465

Reply: 244

PostPosted: May 23, 2011 4:58 PM 

sol 2603 ( May 21, 2011 ) R0 3x1 in the next drive direction:

with a link to a guestimated map position and a L2 3x1 detail.


Posts: 1661

Reply: 245

PostPosted: May 23, 2011 5:04 PM 

John + Bill Harris>>>

Thanks for your posts and support, been away for a few days, and just caught your comments.

Well, regardless of your explanations [I'm weaseling out of this now] sorry boys, but I still can't stand them.

I do have my own image editor, bought and paid for and even picked it up at Corel HQ here in Ottawa, Canada- 'PaintShop Pro X3 edition' and been using this original JASC product through time since 1992.

dx Wink


Posts: 344

Reply: 246

PostPosted: May 24, 2011 11:54 AM 

Pretty dramatic gash in the ripple here.


Posts: 344

Reply: 247

PostPosted: May 24, 2011 11:55 AM 

Filled crater? Why is the filling higher than in the rippled area?

John Henry Dough

Posts: xxx

Reply: 248

PostPosted: May 24, 2011 6:31 PM 

And another bottom right,
These seem to be originating from beneath?


Posts: 3062

Reply: 249

PostPosted: May 24, 2011 9:25 PM 

Barsoomer, Re. your reply #247. You asked "Filled crater? Why is the filling higher than in the rippled area?"

Because of the continuous water cycle and karst phenomena.



Posts: xxx

Reply: 250

PostPosted: May 24, 2011 11:02 PM 

Hi Barsoomer.
You seem to have a knack for picking up the unusual features, but a more mundane and possibly boring explanation is that there is absolutely nothing unusual about this. It may or may not represent a very old crater that filled with sand before the dunes froze but I don’t think that the fill needs to be more indurated than the rest of the armoured ripples/dunes we have passed by. Opportunity has just traversed a region of thick armoured ripples without bedrock visible (see the sol 2598 image below). This feature looks to be similar.

Dunes stop moving due to lack of wind or lack of sand supply and both factors seem to have influenced this part of Meridiani. Perhaps this was an old filled crater where a greater supply of sand had accumulated when the dunes froze, possibly due to a thicker berry lag due to erosion of ejecta around the crater. Or maybe there is no crater – after all the shape from above is more trapezoidal than circular.


Posts: 344

Reply: 251

PostPosted: May 24, 2011 11:21 PM 

As reply 248 suggests about 246, I think the bedrock slabs may be sinking, and their movement is disrupting the surrounding soil.


Posts: 344

Reply: 252

PostPosted: May 24, 2011 11:32 PM 

Or it is possible that gas or vapor is erupting from below. It would tend to blow out along the edges between the bedrock slabs.


Posts: 3465

Reply: 253

PostPosted: May 25, 2011 11:16 AM 

sol 22606 ( May 24, 2011 ) L0 3x1 in next drive direction:

with links.


Posts: 344

Reply: 254

PostPosted: May 25, 2011 3:25 PM 

Another example of the duricrust breaking around the edges of slabs. Some indication of compressive forces here.

John Henry Dough

Posts: xxx

Reply: 255

PostPosted: May 25, 2011 7:14 PM 

err....BS you kinda read my mind,,,

On reply 254.(just posted).how would you describe the center of the picture??,by describe I
mean understandable example or such?? as in Reply 251,,,

Who Knows? Its a long way to Mars.We are looking at these pictures with Earth eys,,I mean the way it would look in our back yard or near vicinity,,,we tend to forget the wind (high speed but how much real Force i mean barometric pressure is very low,,,,is it one fourth Earth gravity?This to as in Crested Dunes.
The high and low temperature swings,,it seems
to me,,,MUST contribuite to the ?constantly?
(some will debate this) changing Face of Mars.

Thanks to the Bunch of YOU>

,on Reply251 Thank you ,,,,,I can see this scenario...and agree to this

on Reply (same feature)252.....this is harder to grasp,
Thanks Dude,,Rap On,,

John Henry Dough

Posts: xxx

Reply: 256

PostPosted: May 25, 2011 7:26 PM 

picture reply 253
The symmetry is almost unbelievable,,, in original size...bottom right...the ground showing next to the mast....Wow!!!,,good elephant,,,good elephant,,,,good elephant,,,,


Posts: 73

Reply: 257

PostPosted: May 25, 2011 9:21 PM 

Can the "Rock guys" really look at these features and say it is dust falling through cracks with a straight face.


Posts: 5

Reply: 258

PostPosted: May 26, 2011 4:42 PM 

Fred; Due to their scattered appearance one would have to say it is a very local phenomena.

The only way for this to happen in a small area would be ;

Material is ejected out of linear openings (cracks) at a velocity sufficient to disperse it (none piled along the margins of the "cracks" OR
Void space beneath the surface increases by one of several methods which allows the dry, granular sand to fall into cracks connected to the void space.


Posts: 73

Reply: 259

PostPosted: May 26, 2011 7:13 PM 

Thanks for your ability to man-up.

Ben wrote:
“Material is ejected out of linear openings (cracks) at a velocity sufficient to disperse it (none piled along the margins of the "cracks”

We are at least on the same page. I say it is gas/vapor emissions and occasional liquid water eruptions doing the ejecting. This is of course responsible for the berries being pushed away from the cracks in lines.


Posts: 3465

Reply: 260

PostPosted: May 26, 2011 9:44 PM 

sol 2608 ( May 26, 2011 ):

Ah. Holiday science target. Good idea.

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