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The Top of Vera Rubin Ridge Part 2, Site 67-, sol 1944-, 24 Jan 2018-
djellison
post Oct 12 2018, 08:14 PM
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QUOTE (PaulM @ Oct 12 2018, 05:49 AM) *
I wonder if there is a common cause for both failures.


No.
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Actionman
post Oct 12 2018, 08:22 PM
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QUOTE (djellison @ Oct 12 2018, 04:14 PM) *
No.

You know more then you're letting on? maybe
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djellison
post Oct 12 2018, 08:39 PM
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One is a lack of solar power. One is a flash memory problem.

Even with just publicly available information it's really quite obvious that they're unrelated.
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Actionman
post Oct 12 2018, 08:49 PM
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QUOTE (djellison @ Oct 12 2018, 04:39 PM) *
One is a lack of solar power. One is a flash memory problem.

Even with just publicly available information it's really quite obvious that they're unrelated.

The one is dust related, why can't the other with the memory lose not be in any way dust related?
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djellison
post Oct 12 2018, 09:02 PM
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See mcaplinger's comments above.
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nprev
post Oct 12 2018, 09:09 PM
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Because the dust would have to a- make it inside of the MSL body enclosure, b- also make it inside of the processor chassis and c- somehow manage to cause this seemingly quite specific flash memory issue instead of shorting out and physically destroying the electronics, which would be a much more serious and obvious failure mode.

Spirit had flash memory issues only 8 sols after landing, and in clear conditions. They were resolved via software methods. Dust did not cause that.

Moving on...


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ngunn
post Oct 12 2018, 09:19 PM
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Come to think of it both rovers have had flash memory problems. Maybe that's the link. Or could it be cosmic rays? Perhaps they cause dust storms as well as memory problems. (Just joking. Any two points can be joined by a straight line but that doesn't make a trend.)

EDIT: nprev got there first sad.gif
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Actionman
post Oct 12 2018, 09:25 PM
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QUOTE (nprev @ Oct 12 2018, 05:09 PM) *
Because the dust would have to a- make it inside of the MSL body enclosure, b- also make it inside of the processor chassis and c- somehow manage to cause this seemingly quite specific flash memory issue instead of shorting out and physically destroying the electronics, which would be a much more serious and obvious failure mode.

Spirit had flash memory issues only 8 sols after landing, and in clear conditions. They were resolved via software methods. Dust did not cause that.

Moving on...

I agree dust in the components less then zero chance of happening.

there is more then enough time to wonder what has happened to Curiosity.

I was just wondering what were the preparation that were made for Curiosity before and during the dust storm.

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djellison
post Oct 12 2018, 09:39 PM
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QUOTE (Actionman @ Oct 12 2018, 01:25 PM) *
I was just wondering what were the preparation that were made for Curiosity before and during the dust storm.


Not many really. Take more environmental observations to monitor the storm. Take more NavCam sky-flat observations to track dust deposition on the front of the optics ( like https://mars.jpl.nasa.gov/msl/multimedia/ra...65M_&s=2160 ) Leave a little extra margin in the planned activities to allow for exposure times to run longer as it got darker during the storm.

It's surprising just how little it impacted ops on MSL.
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djellison
post Oct 13 2018, 09:13 PM
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FHAZ, RHAZ and NCAM images from the A Side cameras just made it to the ground - https://mars.jpl.nasa.gov/msl/multimedia/raw/

They've not been used in, basically, 2000 sols.
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nprev
post Oct 13 2018, 10:02 PM
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Impressive. Looks like they didn't suffer from such prolonged downtime very much if at all.

The shadows still look pretty bright so there's still quite a lot of suspended dust in the air, clearly.


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