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Adjustment of the Rotator Axis and Orientation

Determine the X and Y coordinates of a star on the TV acquisition screen. Change the Sky Position Angle (SPA) by 180 degrees. The star describes a semi-circle reaching a final location on the TV (i.e., [Xf,Yf]). The center of this circle [(X+Xf)/2,(Y+Yf)/2] should be the rotator center. Repeating this process will lead to a more accurate determination of the rotator centre.

To minimize tracking uncertainties, select a star near the pole.

After the rotator centre has been determined a CALIBRATE should be done at this point.

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Wed Feb 11 16:14:30 GMT 1998