| || Estimation of Launch and Impact Points of a Flight Trajectory using U-D Kalman Filter/Smoother
Author : Naidu, V. P. S. ;Girija G.;Raol, J. R.
Source : Defence Science Journal ; Vol:56(4) ; 2006 ; pp 451-463
Subject : 629.7 Aeronautics
Keywords : Trajectory estimation;U-D Kalman filter;R-T-S smoother;Kalman tracking flight trajectory;launch point ;Impact point;Target detection;Air defence;Kalman tracking filter
Abstract : The launch and impact points of a flight trajectory are estimated using U-D Kalman filter and Rauch-Tung-Striebel (R-T-S) smoother. Algorithms are implemented in PC MATLAB and validated using simulated data. The filter performance is evaluated in terms of state error, innovation sequence, and autocorrelation of residuals along with their theoretical bounds. The R-T-S smoother was found to generate accurate state estimates, which led to better launch point estimation. Launch and impact point prediction from real data of a guided target in ballistic mode is also evaluated.