Opportunity drove three times in the last week, spending time between drives to recharge her batteries. Because of the approaching winter solstice, solar array energy levels have been dropping.
Opportunity must pause from driving for a sol or two to recharge her batteries sufficiently to drive again. On Sol 2213 (April15, 2010), Opportunity drove about 66 meters (217 feet).
After recharging on Sol 2214 (April 16, 2010), the rover drove on Sol 2215 (April 17, 2010), traveling only about 36 meters (118 feet).
With two sols of recharging, Opportunity drove on Sol 2218 (April 20, 2010), achieving almost 66 meters (217 feet).
The plan ahead is more driving as energy allows. As of Sol 2218 (April 20, 2010), the solar array energy production was 247 watt-hours with an atmospheric opacity (tau) of 0.348 and a dust factor of 0.4995.
Total odometry is 20,553.25 meters (20.55 kilometers, or 12.77 miles).
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