As of last
week...
Opportunity started exhibiting memory
symptoms
this month similar to events seen with Spirit in
2009. This is not a health and
safety concern, but can cause
loss of some data intended for downlink. It can
be avoided
for more important data by downlinking before any rover nap.
The
suspect cause is corruption in the flash file system
used by the rover for
non-volatile telemetry storage. The
project implemented a detection diagnostic
on Sol 3189 (Jan.
12, 2013) to flag the occurrence of these events in separate
non-volatile memory. No events have occurred since Sol 3183
(Jan. 6, 2013),
and the rover remains in good health.
As of Sol 3193 (Jan. 16, 2013),
the solar array energy
production was 498 watt-hours with an atmospheric
opacity
(Tau) of 1.08 and a solar array dust factor of 0.623.
Total
odometry is 22.03 miles (35455.34 meters).
So it is
starting to wear out. Arthritic joint in its
arm, bad wheel bearing, and now
signs of memory corruption.
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