Ballistic target tracking and its interception using suboptimal filters on reentry

In this work, tracking of a ballistic target on reentry using an interceptor missile is studied where the main motive is to accurately estimate the acceleration of the incoming ballistic target. To achieve this, nonlinear filters like the unscented Kalman filter (UKF), cubature Kalman filter (CKF) and cubature quadrature Kalman filter (CQKF) are used. For a possible interception of the target by an interceptor, proportional navigation guidance (PNG) law has been used. Efficiency of the filtering techniques has been studied by plotting the root mean square error (RMSE) of the target acceleration and by calculating the final miss-distance.