Abstract
GPS was used with a short baseline (1 and 2 wavelengths) triple antenna configuration to obtain attitude in conjunction with solid state rate gyros. The system was used to provide an inexpensive attitude-heading reference system (AHRS) for use by small general aviation aircraft. The gyros enabled a high bandwidth output while the GPS was used to estimate the gyro drift rate. The resulting attitude information was used, along with GPS-based position, by a graphical out-the-window view with tunnels indicating the desired path in the sky for the current phase of flight. Accuracy and ease of flying are enhanced by the system.
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