Home Gyro Test Tables VTAS Nonmagnetic Head Tracker Accuracy Test Station VTAS Roll Pitch Helmet Fixture Head Tracker Accuracy Test Station Air Bearing Nonmagnetic Flight Simulator Solar Energy Research Environmentally Controlled Portable Astronomical Observatory |
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VTAS Nonmagnetic Head Tracker Accuracy Station The first requirement of this Visual Target Acquisition System (VTAS) device is magnetic transparency. Linen phenolic and epoxy are used to fabricate the main frame. The x, y, and z "ways" are optically polished glass, straight within 10 arc-seconds. 
Kinematically constrained ceramic ball spindles provide arc-second accuracy after 18 years of service.
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