On the Road Again - volume 8 - Page 5

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hortonheardawho


Posts: 3465

Reply: 81



PostPosted: April 22, 2011 11:19 AM 

Sol 2574 ( Apr 21, 2011 ) L0 3x1 in next drive direction:

with a pancam L2 3x1 link.

The drive index changed from B4X2 to B45L for a change of 241 = 60 meter drive?

Kye Goodwin


Posts: 1166

Reply: 82



PostPosted: April 22, 2011 11:29 AM 

We saw several examples of features like these in the Anatolia area before reaching Endurance Crater, depressions in soil with a little patch of rippled fine sand in the bottom:

Here is another example from Oppy's recent traverse east of Santa Maria (lower left):

Whatever these Anatolia-like features are, they seem to be widely distributed.

Psych Author Profile Page



Posts: no

Reply: 83



PostPosted: April 22, 2011 8:22 PM 

Horton, if you put a vertical stretch of 4 or 5x on 2572's 1P356518133EFFB4X2P2401L2M2, you can make out 3 horizons. A near one, a middle one, which IMHO is hiding Cape York, and a far one which I believe is the actual planetary horizon beyond Endeavor.

Psych Author Profile Page



Posts: no

Reply: 84



PostPosted: April 22, 2011 9:38 PM 

Guess I should say what might be three horizons...

Kevin


Posts: xxx

Reply: 85



PostPosted: April 23, 2011 6:13 AM 

Rover Driver says on Twitter Oppy is 73.3% through the journey to Endeavour and looking for a 130m drive this weekend.

On the subject of Endeavour I saw it fly over London last night with the ISS in hot pursuit. Quite some sight.

John


Posts: xxx

Reply: 86



PostPosted: April 23, 2011 2:22 PM 

Kevin......Endeavour is sitting quietly on the launch pad, scheduled for launch in six days. Meebee you were drinking too many ales, or if you meant London Ky, you were drinking too much moonshine.

hortonheardawho


Posts: 3465

Reply: 87



PostPosted: April 23, 2011 8:21 PM 

sol 2561 ( Apr 8, 2011 ) 3D saturated false color of the depression "Santa Barbara":

with location links.

Basic question: Is this 1.6 meter depression a crater - or a "sinkhole"?

There are other trench-like depressions in this area plus lots of "water signs" - like rinds and "burple" rocks, so I favor the "sinkhole" hypothesis.

Kye Goodwin


Posts: 1166

Reply: 88



PostPosted: April 23, 2011 11:12 PM 

Horton, Re your 87, Thanks. I'm guessing that the depression is neither an impact crater nor a sinkhole. This is erosion from the top down, in my opinion, as are the depressions along fractures like the one in the background. Here is another depression that does not look like an impact crater or a sinkhole:

Lately I'm guessing that the thin dark soil coatings that line most of these pits are responsible for the erosion, which is ongoing.

hortonheardawho


Posts: 3465

Reply: 89



PostPosted: April 24, 2011 1:09 PM 

sol 2576 ( Apr 23, 2011 ) L0 mid-drive:

I think this trench is the one about 240 meters from the sol 2569 position on a 150 degree heading.

The sol 2576 drive was over 3 hours. The next drive direction pans will be taken later today ( sol 2577 ).

hortonheardawho


Posts: 3465

Reply: 90



PostPosted: April 25, 2011 3:14 PM 

The sol 2574 traverse map is here.

Sigh.

My drive distance map measurements have been wrong by a factor of 1.41 for some time.

I assumed that the unscaled traverse maps used by the MER site had a standard HiRise scale of 4 pixels = 1 meter.

They don't.

For some time I have noticed that the drive distances stated in the weekly mission summary did not agree with my traverse map measurments. The sol 2574 maps have scales so I could crosscheck.

It turns out the unscaled maps have a scale of approximately 5.63 pixels per meter. What a strange number.

Does anyone actually care where Oppy is?? - other than "We're not there yet."

Barsoomer


Posts: 344

Reply: 91



PostPosted: April 25, 2011 4:04 PM 

> Does anyone actually care where Oppy is??

Yes, it's nice to know where we are. There is an interesting lowered area with complex ridges coming up ahead.

Kevin Author Profile Page



Posts: no

Reply: 92



PostPosted: April 26, 2011 6:59 AM 

John #86 we were sober! One of the senior observatory demonstrators said it was Endeavour and I believed it. I have since e-mailed him to say that was the Progress Cargo Ship that had been released a couple of days prior.

So hopefully we may get a fly over with Endeavour lining up to dock next week.

BTW London UK!

hortonheardawho


Posts: 3465

Reply: 93



PostPosted: April 26, 2011 9:14 AM 

sol 2576 ( Apr 23, 2011 ) mid-drive panorama of trench:

sol 2577 L2 3x1 in the next drive direction:

hortonheardawho


Posts: 3465

Reply: 94



PostPosted: April 26, 2011 11:24 AM 

sol 2578 ( Apr 25, 2011 ) variation in the L8 view of the sun:

with a link to an animation of the changes to the sun.

I wonder if the 3.5% variation over less than 14 minutes is "real" - ie, a rapid variation of the atmospheric dust?

Today ( sol 2579 ) is a driving day.

Kye Goodwin


Posts: 1166

Reply: 95



PostPosted: April 26, 2011 3:14 PM 

These little craters imaged on the approach to Endurance are unlike any seen along the traverse between Vostok and the area around Santa Maria, that is, they don't seem to occur in areas with big ripples but only where the plain is covered in a thin layer of soil:

Now that we are back in an area without ripples, these peculiar craters have re-appeared:


Barsoomer


Posts: 344

Reply: 96



PostPosted: April 26, 2011 4:10 PM 

The route the rest of the way to Endeavour, marked in pink.

Ben


Posts: 2270

Reply: 97



PostPosted: April 26, 2011 4:11 PM 

Kye; Always looking for a simple answer.

The small impact-objects that create these "dimples" cause very little disturbance where the ripples are thicker and get erased by the movement of more sand.

Where there is only thin sand they leave a depression that is slow to fill.

Their age can be judged by the amount of fill and ejecta left behind.

New ones -- Little fill , more ejecta on rim

Older ones -- More fill and ejecta eroded away leaving only rim of sand

Exhumed ones -- Exposed ring of flat,eroded Meridiani beds with dust filled center.

yellowstone


Posts: 35

Reply: 98



PostPosted: April 26, 2011 10:46 PM 

Barsoomer thanks for the map! Keep posting those if you can. I never quite know where we are but your map solves the problem!

Barsoomer


Posts: 344

Reply: 99



PostPosted: April 27, 2011 11:31 AM 

dish at bottom right

No dish at bottom right

??

r lewis


Posts: 202

Reply: 100



PostPosted: April 27, 2011 12:37 PM 

That's some kind of interesting outcrop or ridge upahead in the last panorama. Dead ahead in the next drive direction. Hope we get a better look tomorow/today.

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