Abstract
A novel integration of Global Positioning System carrier phase signals, rate gyro signals, and baseline strain signals for simultaneous attitude determination and baseline metrology is described in this paper. The carrier phase and rate gyro signals are combined into a simplified, uncoupled attitude Kalman filter possessing two states about each of three body axes. The strain signals are incorporated into a strain-displac ement mapping procedure to estimate static and dynamic motion of a flexible baseline and, hence, provide necessary baseline correction vectors for computation of the attitude. Experimental results for a rigid platform with a five-meter flexible, cantilevered boom demonstrate arcminute-level attitude capability and millimeter-level baseline metrology.
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