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John Callas

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“ We are proceeding very cautiously and exploring all reasonable options ”
Freeing stuck Mars rover may be impossible
United Press International
“ The computer modeling will allow us to connect the results from tests performed in Earth gravity with what to expect from the rover in Mars gravity ”
Freeing stuck Mars rover may be impossible
United Press International
“ We expect that power will improve again as this storm passes, but we will continue to watch this vigilantly ”
Stuck Mars rover struck by dust storm
United Press International
“ This is not a full exoneration of the wheel, but it is encouraging ”
NASA works to free Mars rover Spirit
United Press International
“ While we don't have an explanation yet, we do know that Spirit's batteries are charged, the solar arrays are producing energy and temperatures are well within allowable ranges. We have time to respond carefully and investigate this thoroughly ”
NASA worries why Spirit has rebooted twice
United Press International
“ After several attempts to drive up-slope in loose material to get around the northeast corner of Home Plate, the team judged that route to be impassable ”
NASA picks a new route for a Mars rover
United Press International
“ It's exciting to see our destination, even if we can't be certain whether we'll ever get all the way there ”
Opportunity sights destination crater rim
United Press International
“ These rovers are incredibly resilient considering the extreme environment the hardware experiences every day ”
Mars rovers roll on after five years
United Press International
“ The best chance for survival for Spirit is for us to maintain sequence control of the rover, as opposed to it going into automated fault protection ”
Dust storm threatens Mars rover Spirit
United Press International
“ This is a bolder, more aggressive objective than we have had before ”
Mars rover heads for bigger crater
United Press International
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