After some accumulated dust was blown off of Spirit's solar panels on sol 420 (March 9, 2005), the rover has been producing over 800 watt-hours of energy per sol, about twice as much as before the solar-array cleaning event.
All that extra power has allowed Spirit to do a very aggressive scientific campaign at a soil patch dubbed "Paso Robles 2" with the instruments on the robotic arm.
The rover team planned to wrap up the robotic arm work and send Spirit driving again on sol 431.
Between sols 416 and 418, the front hazard-avoidance cameras showed signs of dust contamination. Images from sol 420 indicate that the left front hazard-avoidance camera has been mostly cleaned off.
Sol-by-sol summaries
