Spirit Copes With Decreasing Solar Energy

With electrical power from Spirit's solar array down to about 300 watt-hours per Martian day, or sol, the science team is able to plan only one major activity per sol and often needs to devote one sol to recharging the rover's batteries.

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<p><a href="http://www.physorg.com/news71465312.html">Spirit Copes With Decreasing Solar Energy</a></p> <p>With electrical power from Spirit's solar array down to about 300 watt-hours per Martian day, or sol, the science team is able to plan only one major activity per sol and often needs to devote one sol to recharging the rover's batteries.</p>