In the radial direction, the angle of the surface tangent with respect to gravity is know for each actuator position. In the circumferencial direction, horizontal is a convenient reference plane. A series of wedges will be needed to maintain the radial inclinometer within its range for the outer parts of the reflector. This simple option has been chosen over a servo controlled platform which, while more elegant, would be more bulky and complex. A block diagram illustrating the various components is shown in Figure 2 .
All components are battery operated.
The operator would read the bar code after installing the tool. The correct actuator tilts would be stored in the computer, along with the correct digimatic indicator readings. Corrections to these readings would then be computed on the basis of the tilt deviations. This, theoretically at least, permits the setting of the surface using the laser rangefinders. This page was last modified on September 11, 1997.