The Top of Vera Rubin Ridge Part 2, Site 67-73, sol 1944-2297, 24 Jan 2018-22 Jan 2019 |
The Top of Vera Rubin Ridge Part 2, Site 67-73, sol 1944-2297, 24 Jan 2018-22 Jan 2019 |
Oct 12 2018, 08:14 PM
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#511
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Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
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Guest_Actionman_* |
Oct 12 2018, 08:22 PM
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#512
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Guests |
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Oct 12 2018, 08:39 PM
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#513
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Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
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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Guest_Actionman_* |
Oct 12 2018, 08:49 PM
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#514
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Guests |
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Oct 12 2018, 09:02 PM
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#515
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Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
See mcaplinger's comments above.
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Oct 12 2018, 09:09 PM
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#516
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Merciless Robot Group: Admin Posts: 8783 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
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... -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Oct 12 2018, 09:19 PM
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#517
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Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
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 |
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Guest_Actionman_* |
Oct 12 2018, 09:25 PM
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#518
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Guests |
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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Oct 12 2018, 09:39 PM
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#519
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Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
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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Oct 13 2018, 09:13 PM
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#520
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Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
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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Oct 13 2018, 10:02 PM
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#521
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Merciless Robot Group: Admin Posts: 8783 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
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. -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Oct 22 2018, 04:33 PM
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#522
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Member Group: Admin Posts: 976 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200 |
Today we are planning Sol 2209 and 2210. Once we get the downlink from Sol 2210 MSL will be the second longest lasting rover mission on Mars.
Paolo, who is not much fond of Halloween spirits, more into scotch and rover Spirits. -------------------- Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
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Oct 22 2018, 11:52 PM
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#523
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Member Group: Members Posts: 866 Joined: 15-March 05 From: Santa Cruz, CA Member No.: 196 |
Curious if the switchover to the A-side engineering cameras suggests they are hardwired to their respective computers, else i'm assuming that is just the default config so can be reassigned if it were necessary at some point (after the 20th mission extension!)
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Oct 23 2018, 12:30 AM
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#524
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Senior Member Group: Members Posts: 2511 Joined: 13-September 05 Member No.: 497 |
Curious if the switchover to the A-side engineering cameras suggests they are hardwired to their respective computers... Yes. Making them cross-strapped would have added more complexity. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Oct 23 2018, 04:23 PM
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#525
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Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
Curious if the switchover to the A-side engineering cameras suggests they are hardwired to their respective computers, else i'm assuming that is just the default config so can be reassigned if it were necessary at some point (after the 20th mission extension!) As mcaplinger said - they're hardwired. When we swapped from the A to B side after Sol 200 - we found the stereo data we were getting out of the NavCams was quite different to the A side cameras, and had to execute an investigative campaign of characterizing the stereo data over a wide range of temperatures. From that the team derived temperature dependent camera models. (look at the same patch of ground....all day - https://mars.jpl.nasa.gov/msl/multimedia/ra...amera=NAV_LEFT_ ) We don't THINK that's a problem on the A side ( the B cameras are sort of on brackets hanging off the bottom of the A side cameras, and they're oriented differently ) - but we're going to do the same thermal characterization to make sure - generating the sort of data volumes usually reserved for our friends from San Diego . Keep an eye out for Sol 2209-2210 NCAM, FHAZ, RHAZ. |
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