https://www.space.com/9697-nasa-awaken-silent-spirit-rover-mars.html
NASA Trying Again to Awaken Silent Spirit Rover on Mars | Space
Jan 5, 2011 - NASA is taking advantage of longer daylight on Mars by ramping up efforts to regain communications with a hibernating rover before spring ends in the southern...
trying againsilent spiriton marsnasaawaken
https://spaceref.com/status-report/nasa-mars-rover-spirit-update-19-may-spirit-remains-silent-at-troy/
NASA Mars Rover Spirit Update 19 May: Spirit Remains Silent at Troy - SpaceRef
May 23, 2011 - Space news and reference site.
mars rover spirit19 may
https://spaceref.com/status-report/mars-rover-spirit-remains-silent-at-troy/
Mars Rover Spirit Remains Silent at Troy - SpaceRef
Jan 9, 2011 - Space news and reference site.
mars rover spiritremainssilenttroy