Exploration of Cape York - Vol 4 - Page 7

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Barsoomer


Posts: 344

Reply: 121



PostPosted: June 11, 2012 8:16 PM 

The 3 wheels in use are perpendicular. The spare is at a slant to the other three so that it could be used as a replacement for any of them. (However, I don't know what effect the slant might have on ops.) Actually Odyssey could still be controlled to some extent even with only two reaction wheels.

MSL has direct-to-earth capabilities, and can also relay through MRO and maybe Mars express.

[link]

However, apparently MSL is dependent solely on relaying through ODY for the critical entry, descent, and landing phase!

Barsoomer


Posts: 344

Reply: 122



PostPosted: June 11, 2012 8:26 PM 

[link]

Emily's blog on TPS has the information about the reaction wheels.

Kevin


Posts: xxx

Reply: 123



PostPosted: June 12, 2012 5:07 AM 

Nice insight here from Scott Maxwell on a Sol to Sol account of a Rover Planner:

http://marsandme.blogspot.co.uk/

Mizar


Posts: 692

Reply: 124



PostPosted: June 12, 2012 3:32 PM 

Thanks Barsoomer, Emily's blog was very informative. Cross our fingers for Ody and Curio! ... ehh ... Curiosity!

hortonheardawho


Posts: 3465

Reply: 125



PostPosted: June 12, 2012 4:46 PM 

sol 2981 ( today ) 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
----- -------- --- --- --- --- --- ---- -----------
02981 p1154.01 2 0 0 2 0 4 front_hazcam_idd_unstow_doc
02981 p1165.00 1 1 0 0 0 2 flhaz_IDD_check_subframe_2bpp_pri_41
02981 p1211.03 2 0 0 2 0 4 ultimate_front_haz_1_bpp_pri_15
02981 p1254.02 2 0 0 2 0 4 front_haz_fault_pri15_4bpp
02981 p1312.07 2 0 0 2 0 4 rear_haz_ultimate_2_bpp_pri15
02981 p1354.01 2 0 0 2 0 4 rear_haz_fault_pri15_4bpp
02981 p1970.08 8 0 0 8 0 16 navcam_4x1_az10_custpri
02981 p2111.06 13 13 0 0 2 28 pancam_cal_targ_L234567Rall
02981 p2129.02 4 4 0 0 2 10 pancam_cal_targ_L257R2
02981 p2364.30 16 0 0 16 2 34 pancam_Cape_York_4x1_L257R2
02981 p2594.29 26 26 0 0 2 54 pancam_Mill_Creek_L234567Rall
02981 p2601.05 4 2 0 0 2 8 pancam_tau_L78R48
02981 p2601.05 4 2 0 0 2 8 pancam_tau_L78R48
02981 p2633.03 4 2 0 0 2 8 pancam_late_tau_L58R48
02981 Total 90 50 0 34 14 188

The show must go on.

Looks like a move to a new target "Mill Creek".

hortonheardawho


Posts: 3465

Reply: 126



PostPosted: June 14, 2012 8:40 AM 

sol 2981 ( Jun 13, 2012 ) rear hazcam view after guestimated 16 meter drive:

Are these the droids you are looking for?

hortonheardawho


Posts: 3465

Reply: 127



PostPosted: June 14, 2012 11:19 AM 

The sol 2983 ( today ) plan includes a north looking Navcam pan - but no view to the south??

Perhaps these are the droids you are looking for???

Still no Mars satellite relay? Doesn't MRO have any relay capabilities? If MRO can't communicate with Mars landers, then the communications system designers should be shot.

I know Mars Express has demonstrated relay communication with the rovers - so maybe that is the only backup relay?

And to think some of us in the 60's actually thought there would be a thriving Mars colony by now.

Perhaps somewhen in the infinite alternate universes in the multiverse it is so.

Barsoomer


Posts: 344

Reply: 128



PostPosted: June 14, 2012 3:23 PM 

Yes, MRO has been used to do some of the routine relaying from Opportunity, but I think ODY has done most of it. As Horton points out, there have been demonstrations of relaying with MEX, but it doesn't seem to be used on a regular basis. There is also direct-to-Earth of course, but the bitrate is much lower, kind of like a dial-up modem versus dsl.

MSL has all those capabilities also, but I think it will be out of the direct view of Earth during EDL.

hortonheardawho


Posts: 3465

Reply: 129



PostPosted: June 15, 2012 7:30 AM 

sol 2982 ( Jun 14, 2012 ) R0 3x1 looking north:

Ah, the north looking pan was taken yesterday. The rest of the 360 pan is scheduled for sol 2983.

hortonheardawho


Posts: 3465

Reply: 130



PostPosted: June 15, 2012 8:08 AM 

Mill creek is not the new target. It is the left side of the Monte Cristo vein after a slight "bump" towards the vein - but of course - as predicted - no closer view of Monte Cristo before fleeing.

I know this from the thumbnails that are now showing up on the Pancam Tracking site - which implies that the relay link is working again. Yay!

The north looking pan in reply 129 showed up as an "Unexpected Sequence!!!" what's up with that?

BTW, I had north and south reversed in reply 127. I seem to be doing that a lot lately. A sign of advancing age. That sort of thing is supposed to happen to other people - not me!

Ah well. Ah well.

hortonheardawho


Posts: 3465

Reply: 131



PostPosted: June 15, 2012 8:52 AM 

Ah, communication complications. The Opportunity update Slow Going Due to Communication Issues explains what's been going on.

Barsoomer


Posts: 344

Reply: 132



PostPosted: June 15, 2012 3:11 PM 

http://twitter.com/NEEMO_Steve/status/213434741934919682

Big cleaning event.

hortonheardawho


Posts: 3465

Reply: 133



PostPosted: June 15, 2012 4:18 PM 

sol 2970-2982 comparison of solar cells:

Yes, the deck and solar cells seem darker ( ie, less "red" dust = cleaner ).

Barsoomer


Posts: 344

Reply: 134



PostPosted: June 15, 2012 10:49 PM 

And the so-called "splat" has become less dark, which suggests it involves dark material that blew away.

hortonheardawho


Posts: 3465

Reply: 135



PostPosted: June 16, 2012 1:44 PM 

I hoped that someone else also picked up on the change to the "splat". I get tired of pointing out everything that I see. In fact I simply can't.

Today's ( sol 2985 ) 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
----- -------- --- --- --- --- --- ---- -----------
02985 p2129.02 4 4 0 0 2 10 pancam_cal_targ_L257R2
02985 p2365.30 6 0 0 6 1 13 pancam_lowlight_contact_6x1_L6
02985 p2366.30 16 0 0 16 2 34 pancam_contact_pt1_4x1_L257R2
02985 p2601.05 4 2 0 0 2 8 pancam_tau_L78R48
02985 Total 30 6 0 22 7 65

Looks like the geology of the Cape York "north beach" will be studied. I think the low light is to help "see" the shallow trench around the edge of Cape York.

hortonheardawho


Posts: 3465

Reply: 136



PostPosted: June 19, 2012 8:12 AM 

Odyssey still "offline".

2. What EDRs do we have on the ground from sol 2987?

Actual number of EDRs by sequence number and image type:

Sol Seq.Ver ETH ESF EDN EFF ERP Tot Description
----- -------- --- --- --- --- --- ---- -----------
02987 p1550.01 0 0 0 0 0 0 navcam_tau
02987 p2129.02 0 0 0 0 0 0 pancam_cal_targ_L257R2
02987 p2367.30 0 0 0 0 0 0 pancam_contact_pt2_3x1_L257R2
02987 p2601.05 0 0 0 0 0 0 pancam_tau_L78R48
02987 Total 0 0 0 0 0 0

It is now sol 2987 19:30 LTST and still no downlinks via MRO?

hortonheardawho


Posts: 3465

Reply: 137



PostPosted: June 19, 2012 2:54 PM 

sol 2981-2986 L257 "stamp" animation:

Maybe I see a deck darkening - and maybe I don't. Let's say I do.

Will be happy when real images are again available from Oppy.

BTW for the 5 people in the world now following this blog ( my Flickr stats for yesterday show only 5 from the marsroverblog.com domain. Fifteen views were from Russian blogs for Christs sake - and most of the 311 views were from direct visits to Flickr ) , this is another "first" for me: a color stamp animation of the full-frame pancam calibration images.

One of the odd features of the sub-Frame images like the pancam calibration image is that the full frame stamp is "thrown away" after the sub-frame is downlinked - so you have to be "quick" to catch one of these.

But since there are no "real" images coming from Oppy right now this animation was possible without a lot of forethought.

Man, I gott'a get a life.

Barsoomer


Posts: 344

Reply: 138



PostPosted: June 19, 2012 8:25 PM 

Horton, thanks for gleaning a piece of new imagery to fill the great data drought. I'm suffering withdrawal from lack of Mars data!

John Henry Dough


Posts: xxx

Reply: 139



PostPosted: June 20, 2012 1:14 PM 

Man, I gott'a get a life.
--------------------------------

Your doing great and sharing with the world
IS your life (and ours)...so no mo grumbling
..oh Great One.You frighten some of us with it.
Seriously,,
JD

hortonheardawho


Posts: 3465

Reply: 140



PostPosted: June 21, 2012 7:38 AM 

List of All EDRs in ObsID: B2989_P131107_01:
------------------------------------------------

/oss/merb/ops/ops/surface/tactical/sol/2989/opgs/edr/rcam/1R393541656EFFBRQ2P1311L0M1.IMG
/oss/merb/ops/ops/surface/tactical/sol/2989/opgs/edr/rcam/1R393541656EFFBRQ2P1311R0M1.IMG
/oss/merb/ops/ops/surface/tactical/sol/2989/opgs/edr/rcam/1R393541656ETHBRQ2P1311L0M1.IMG
/oss/merb/ops/ops/surface/tactical/sol/2989/opgs/edr/rcam/1R393541656ETHBRQ2P1311R0M1.IMG

obsid = B2989_P131107_01
number of jpegs: 0


Today ( sol 2989 ) Oppy moved from BRP9 to BRQ2 ( index change of 29 ) for a guestimated distance of 6 meters.

The thumbnails are not yet available - so I don't know where the move was to - but I suspect that Oppy moved onto the contact ( the white outcrop in reply 129 ) . A 180 degree pan centered on azimuth 54 was done after the move.

It is now a week since any full size images were returned to Earth and 10 days since the last status report.

My guess is that MRO ain't working out as a relay. I wonder why?

I vaguely remember that there was an issue with radio frequency overlaps between MRO and the MERs that was of some concern. ( The MERs were "supposed to be dead" by the time MRO arrived at Mars. )

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