Step Sixteen: Communication attempt begins
About 14 minutes after Spirit hits the ground and four minutes after it stops bouncing and rolling, transmission of tones resumes from the rover's low-gain X-band antenna. If the rover lands with its base petal down, this antenna will be near the top of the bundle and in a position that may be favorable to sending a signal to Earth. Its transmission of tones ends 150 seconds later. The lander, however, may not be in this orientation. Therefore, beginning about three minutes later, another low-gain X-band antenna, this one mounted on the lander's base petal, transmits tones for 150 seconds as well.

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