Raytheon Company

Richard J DeFonzo

Vincent A Grosso

Robert J Fitzgerald

Apparatus and method of determining a roll reference for strap down seeker in a spinning projectile is shown to consist of the steps of: (a) determining the frequency spectrum of signals out of an accelerometer disposed in such missile to be sensitive to roll, precession and nutation forces; (b) separating the signals caused to the roll forces; and (c) processing the separated signals to determine the roll reference.

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Northboro, MA, United States of America

Richard J DeFonzo