On the Road Again - volume 8 - Page 3

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hortonheardawho


Posts: 3465

Reply: 41



PostPosted: April 10, 2011 10:26 AM 

sol 2562 ( Apr 9, 2011 ) 3D of track and front wheels after drive:

Today's drive ( sol 2563 ) is now underway.

What is surprising about this drive is no navcam or pancam pictures were downlinked before the move.

My guess is there are no features ahead seen in the HiRise images that might be remotely threatening to a totally blind drive.

hortonheardawho


Posts: 3465

Reply: 42



PostPosted: April 11, 2011 5:51 PM 

sol 2563 ( Apr 10, 2011 ) in next drive direction:

hortonheardawho


Posts: 3465

Reply: 43



PostPosted: April 12, 2011 10:39 AM 

sol 2560 ( Apr 7, 2011 ) looking back towards Santa Maria:

From the sol 2561 traverse map the distance traveled on sol 2560 was about 144 meters.

Santa Maria crater is about a kilometer away.

Today's drive ( sol 2565 ) is now underway and I am expecting another long ( 120+ m ) drive.

Fred


Posts: 73

Reply: 44



PostPosted: April 12, 2011 12:30 PM 

Nice image Hort.

hortonheardawho


Posts: 3465

Reply: 45



PostPosted: April 12, 2011 7:07 PM 

2. What EDRs do we have on the ground from sol 2565?

Actual number of EDRs by sequence number and image type:

Sol Seq.Ver ETH ESF EDN EFF ERP Tot Description
----- -------- --- --- --- --- --- ---- -----------
02565 p0663.03 0 0 0 0 0 0 navcam_3x1_az_108_3_bpp
02565 p1154.01 0 0 0 0 0 0 front_hazcam_idd_unstow_doc
02565 p1165.00 0 0 0 0 0 0 flhaz_IDD_check_subframe_2bpp_pri_41
02565 p1211.03 0 0 0 0 0 0 ultimate_front_haz_1_bpp_pri_15
02565 p1214.05 0 0 0 0 0 0 front_haz_ultimate_4bpp_pri15
02565 p1254.02 0 0 0 0 0 0 front_haz_fault_pri15_4bpp
02565 p1312.07 0 0 0 0 0 0 rear_haz_ultimate_2_bpp_pri15
02565 p1354.01 0 0 0 0 0 0 rear_haz_fault_pri15_4bpp
02565 p2396.27 0 0 0 0 0 0 pancam_drive_direction_4x1_L2R2
02565 p2601.05 4 0 0 0 0 4 pancam_tau_L78R48
02565 p2601.05 4 0 0 0 0 4 pancam_tau_L78R48
02565 Total 8 0 0 0 0 8

Well, that was unexpected.

It is now the night of 2565 and only the tau images have been downlinked.

It doesn't look as if the drive happened. I wonder if the drive was aborted after it was planned because someone noticed "something interesting" and decided to delay the drive for a few sols. Naah. I don't see anything even 1/10th as interesting as the rocks at this sol 2561 position:

Most likely some sort of fault occurred almost immediately as soon as the drive started.

From the sol 2563 traverse map the sol 2563 drive was about 114 meters.

Ben


Posts: 2270

Reply: 46



PostPosted: April 12, 2011 8:32 PM 

Hort; According to your map, getting close to a zone of biforcating cracks Smile

Barsoomer


Posts: 344

Reply: 47



PostPosted: April 12, 2011 8:38 PM 

A drive has been planned every weekday for two or three weeks. The Mars and Earth (jpl) day have likely now moved out of phase so that a drive can only be planned every other weekday for the next two or three weeks. (The downlink from the end of one drive is needed in order to plan the next drive.)

The Mars day is about 24 hours and 37 minutes, so the cycle should repeat every 39 days or so, with some variation resulting from weekends and holidays. During the primary mission (first 90 days), the MER team was living on Mars time in order to plan every Sol.

Bill Harris


Posts: 72

Reply: 48



PostPosted: April 12, 2011 9:15 PM 

@hort: "I don't see anything even 1/10th as interesting as the rocks at this sol 2561 position"

Mysterious. I'm still waiting on the "foreground quarter" and the "Santa Barbara" Pnacams from Sol 2561.

p2535.27 13 pancam_foreground_quarter_L234567Rall

p2536.27 4
pancam_Santa_Barbara_L257R2

Either they've found something really interesting or the mission planning is actually being done by Senior Administrative Interns.

--Bill

hortonheardawho


Posts: 3465

Reply: 49



PostPosted: April 13, 2011 9:04 AM 

sol 2561 ( Apr 8, 2011 ) mid-drive panorama ( L0 6x1 ) of large crack:

Any ideas what caused this crack?

No drive planned for today ( sol 2566 ).

Barsoomer


Posts: 344

Reply: 50



PostPosted: April 13, 2011 11:36 AM 

Middle of left edge: it looks like a tiny new crack is beginning to open. In stereo, the near side appears to be sinking relative to the far side, causing the crack. Maybe all the cracks around here are caused by differential sinking. Like highway cracks.

Kye Goodwin


Posts: 1166

Reply: 51



PostPosted: April 13, 2011 12:13 PM 

Horton, Thanks. Re your 49: Originally the crack formed as a huge area covered with new impact-surge sediments began to dry out and shrink in the aftermath of the impact event. The length of these features and their wide distribution across Oppy's traverse suggests that large areas were wet and then dehydrated together.

I'm more interested in what has happened since that time. The fracture has somehow caused erosion of the adjacent plain producing a broad shallow depression centered on the fracture, but maybe 10 times it's width. There are even "escarpments" just a few cms tall that have formed near the distal edge of the depression:

I see four places, all on the far side of the trench and near the top of the slope where lines of "cliffs" have formed. These are less than 5 cm tall but up to a m long. We see something like these at every crater. I wonder why they form? I wonder how erosion happens on Mars?

James


Posts: 3

Reply: 52



PostPosted: April 13, 2011 12:30 PM 

Hort:
A fracture from Endeavour impact? However, the Meridian sediments appear to have partially subsided into the 'crack'. There are suggestions of a channel-like structure, with nascent 'terraces' indicative of erosive flow within the 'channel'. Perhaps the omniscient wind or a brief up-welling of water.

hortonheardawho


Posts: 3465

Reply: 53



PostPosted: April 13, 2011 1:57 PM 

Re: Missed sol 2565 drive:

From the twitter of Scott Maxwell ( MarsRoverDriver )

Short drive thisol: ~ 85m southeast. Sadly, we lost our Wednesday uplink, and that was going to be our long drive. IDD still possible.

about 23 hours ago via web

I think this means that the daily plan is posted to the web before it is unlinked - so if an uplink is missed then obviously the plan can't be executed.

LWS


Posts: 3062

Reply: 54



PostPosted: April 13, 2011 9:56 PM 

What! No discussion on "bagua" by the rock guys! What is it, Ben? Martian Tufa? a martian Limestone? What?

Winston

Ben


Posts: 2270

Reply: 55



PostPosted: April 14, 2011 12:09 AM 

Winston; Neither of those. I am sticking with my reply 6.
Impact breccia from probably an older crater that has been cemented by secondary mineralization that occured below the water table.
Note the angular fragments around the base of the rock that have eroded out and
absence of usual berries mixed with them.

Ben


Posts: 2270

Reply: 56



PostPosted: April 14, 2011 12:45 AM 

Winston; I commented on this in my reply #6.
I am sticking with the idea that it is buried impact breccia from a buried older crater that was ejected by the SM impact.
While buried , it was modified and the fragments cemented together by secondary mineralization , below the water table.

Please note ,angular ,fragments "breccia" on the ground surface that have been eroded out of the rock and the lack of berries normally found.

This could suggest the rock was altered below the level of berry growth. Rolling Eyes

LWS


Posts: 3062

Reply: 57



PostPosted: April 14, 2011 9:08 AM 

Ben
Thanks!
Winston

hortonheardawho


Posts: 3465

Reply: 58



PostPosted: April 14, 2011 11:06 AM 

sol 2563 R0 5x1 lookback towards Santa Maria crater:

The crater is now about 1.2 km distant to the NW and about 4.8 degrees wide.

I find it interesting that the crater is more visible driving away than when approaching. Here is a view only 0.85 km from the crater approaching it from the NW.

Today ( sol 2567 ) only a tau measurement is planned. Looks like the day ( and days following? ) will be devoted to clearing out the flash memory. There are still color images from Santa Maria not yet downloaded.

hortonheardawho


Posts: 3465

Reply: 59



PostPosted: April 15, 2011 12:56 PM 

sol 2568 image plan:

4. What EDRs did we request?

Expected EDRs by sequence number and image type:

Sol Seq.Ver ETH ESF EDN EFF ERP Tot Description
----- -------- --- --- --- --- --- ---- -----------
02568 p2128.02 3 3 0 0 1 7 pancam_cal_targ_L257
02568 p2397.27 6 6 0 0 1 13 pancam_Endeavour_Rim_2x1_L257
02568 p2601.05 4 2 0 0 2 8 pancam_tau_L78R48
02568 p2694.17 46 0 46 0 2 94 pancam_twilight_L7R4
02568 Total 59 11 46 0 6 122


No drive today ( sol 2568 ).

A 2x1 L257 of Endeavour plus a 46 image twilight ( sunset? ) L7R4 ( UV / IR ) sequence are planned.

So today Oppy is kicking back, enjoying the view of the mountains and taking in a sunset.

What happened to drive, drive, drive?

Looks like I will spend the day doing pancam spectra of the stain and the dust on the magnets.

Barsoomer


Posts: 344

Reply: 60



PostPosted: April 15, 2011 3:42 PM 

How did those conical rocks form? Why is the part just outside the crater planned down, whereas the part inside the rim seems pristine. If the part inside the rim is protected from thewind, then how did the concentric layers become so prominent? And why are the layers slanted with respect to major axis?

The unusual conical shape makes one wonder whether there is any connection with this:

link

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