The method involves obtaining high data rate vibration samples and estimating vibration power spectral density. The estimates are combined with previously determined calibration coefficient, for generating real time vibration induced error correction. Inde...

A method for use in vehicle attitude determination includes generating GPS attitude solutions for a vehicle using three or more antennas receiving GPS signals from two or more space vehicles. An inertial navigation system is initialized by setting the atti...

In a fiber optic rotation sensor, a portion of the coiled optical fiber is a part of and affected by a bias optical phase modulator which causes a varying phase relationship between the light waves at a fundamental frequency. However, the varying phase rel...