This paper studies the problem of tracking a ballistic object in

the reentry phase by processing radar measurements. A suitable

(highly nonlinear) model of target motion is developed and the

theoretical Cramer—Rao lower bounds (CRLB) of estimation

error are derived. The estimation performance (error mean and-This paper studies the problem of tracking a ballistic object inthe reentry phase by processing radar measurements. A suitable (highly nonlinear) model of target motion is developed and thetheoretical Cramer-Rao lower bounds (CRLB) of estimationerror are derived. The estimation performance (error mean and