Drive or die
Regarding Spirit’s future agenda of exploration within Gusev crater, "we are now in a ‘drive or die’ situation," Squyres said. The robot’s set of power-providing solar wings are dusty.
Given the upcoming winter on Mars, with the Sun dropping low in the sky, ground controllers need to park Spirit onto north facing slopes. "We effectively sort of have to hibernate when we get into the depths of winter," Squyres said.
Identifying prospective safe havens for Spirit is a task yet to be completed.
"We’re hoping within a week or two to be on a nice, toasty and warm north-facing slope that will enable us to survive yet another winter on Mars," Squyres concluded.