layer1_th.gif

This chart illustrates evidence of layering found with the Sojourner rover soil mechanics experiment. In this investigation, the rover wheels are spun while simultaneous measurements of motor currents, vehicle kinematic configuration, and temperature are recorded. From these data, wheel torque and, in turn, shear force at the soil/wheel interface are computed. This tractive coefficient (analogous to friction coefficient) is used to characterize the soils.

layer2_th.gif

The chart above shows graphical representations of some soil structures determined by the Sojourner rover soil mechanics experiment.

RoverSol70_Yogi.gif

This stereo anaglyph of the rock "Yogi" is a portion of an image taken by the Sojourner rover on Sol 70. Much of Yogi visible in this image cannot be seen from the perspective of the Pathfinder lander. To view this image in stereo, use glasses with a red left eye and blue right eye.