So how cautious are you when debugging a valuable system like this? I imagine you’re not allowed to just ssh and `sudo -u less logs`
I wonder if they run a paralell earth based system to run simulations on first.
Curiosity rover gives Nasa a scare, needed a reset
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Re: Curiosity rover gives Nasa a scare, needed a reset
#12So how cautious are you when debugging a valuable system like this? I imagine you’re not allowed to just ssh and `sudo -u less logs`
I wonder if they run a paralell earth based system to run simulations on first.
Yes - several, at varying degrees of fidelity, the highest of which is an exact replica rover named MAGGIE that lives in the garage next to the JPL “Mars Yard”.
Re: Curiosity rover gives Nasa a scare, needed a reset
#13Earlier quoted context omitted.
https://www.amazon.com/Mars-Rover-Curiosity-Curiositys-Engin...
thanks, ordered
Could someone who's read both compare the two books that have been linked? The !GP one sounds much more technical going by reviews on Amazon. The GP one sounds more about the organizational challenge (both are interesting).
Re: Curiosity rover gives Nasa a scare, needed a reset
#14Does anyone have more info on this? From what I recall there are mirrored systems with duplicate CPUs, memory, flash, etc. In the event of issues with one computer, they failover to the second. Was this an issue with something on the "A/primary", "B/backup" computer, or something more global?
Re: Curiosity rover gives Nasa a scare, needed a reset
#15Earlier quoted context omitted.
thanks, ordered
Could someone who's read both compare the two books that have been linked? The !GP one sounds much more technical going by reviews on Amazon. The GP one sounds more about the organizational challenge (both are interesting).
I haven't read either, but Emily Lakdawalla's book is published by Springer Praxis, and I find that their books tend to be satisfyingly technical and detailed.
Re: Curiosity rover gives Nasa a scare, needed a reset
#16Earlier quoted context omitted.
I wonder if they run a paralell earth based system to run simulations on first.
Yes - several, at varying degrees of fidelity, the highest of which is an exact replica rover named MAGGIE that lives in the garage next to the JPL “Mars Yard”.
TIL - that's really cool, though surprisingly difficult to find info about.
Re: Curiosity rover gives Nasa a scare, needed a reset
#17Re: Curiosity rover gives Nasa a scare, needed a reset
#18Where can I read about how Curiousity’s hardware and software works at a low level so things like communications still work in safe mode? Truly fascinating engineering.
Not a read, but there was this cool conference called "The Mars Rover On-board Computer" last year at 35C3 :
https://media.ccc.de/v/35c3-9783-the_mars_rover_on-board_com...
Re: Curiosity rover gives Nasa a scare, needed a reset
#19Does anyone have more info on this? From what I recall there are mirrored systems with duplicate CPUs, memory, flash, etc. In the event of issues with one computer, they failover to the second. Was this an issue with something on the "A/primary", "B/backup" computer, or something more global?
Take a look at this : https://media.ccc.de/v/35c3-9783-the_mars_rover_on-board_com...
Around 25:45, there is a quick part about the CPU A flash issues on Sol 200.
Re: Curiosity rover gives Nasa a scare, needed a reset
#20Once again proven to be true... What don't kill you will make you stronger!