Passive Range Estimation for Antishipping Missiles
Final rept. 1 Feb 1973-31 Dec 1975
ANALYTIC SCIENCES CORP READING MA
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This report deals with several techniques for passive ranging, i.e., the estimation of target range from noisy measurements of bearing or line-of- sight angle alone. The type of engagement treated in this investigation involves a maneuvering surface target and a missile without an altimeter. The missile approaches the target along a trajectory that is characterized by a low- altitude cruise phase followed by a terminal pitch-up maneuver. Several modified Kalman filter-like algorithms are applied to this nonlinear filtering problem these include the extended Kalman filter based on small-signal linearization and several quasi-linear Kalman filters based on random-input describing function theory. Performance comparisons are obtained by applying the filters to a number of trajectories.
- Guided Missile Trajectories, Accuracy and Ballistics