different times for last boot between last and uptime -s

Ralf Mardorf kde.lists at yahoo.com
Tue Dec 6 19:36:42 UTC 2022


On Tue, 2022-12-06 at 19:32 +0100, Liam Proven wrote:
> Reason for mission failure: they turned it off by mistake. I'm not
> kidding. They sent what was meant to be a temporary sleep command but
> in fact was a shutdown command.

The Wiki says something else.

"Quoted from the report [...] This high spin rate would cause the
spacecraft to enter into the "contingency mode," which interrupted the
stored command sequence and thus, did not turn the transmitter on. [...]
However, the spin effect may be academic, because the released MMH would
likely attack and damage critical electrical circuits within the
spacecraft. [...]"

- https://en.wikipedia.org/wiki/Mars_Observer#Communications_loss

IIUC no wrong command was sent. IOW the issue wasn't that the
transmitter stayed turned off, the issue were circuits damaged by the
monomethyl hydrazine fuel. OTOH if all the circuits had remained
undamaged, would the emergency mode have ended and the transmitter
turned on?








More information about the ubuntu-users mailing list