An image acquired March 30, 2004, by the Mars Global Surveyor and released Monday, Sept. 27, 2004, shows a dark dot identified as the rover Spirit next to giant Bonneville Crater and the thin dark line of its tracks leading back to its lander on the planet. The picture was made by rolling the entire spacecraft to produce sharper images. The process adjusts the rotation rate of the spacecraft to match the ground speed under the camera.
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Brad B.