Target course estimation in tracking filters using local Cartesian coordinates

In this paper a problem of radar tracking of aircraft in medium-to-long range surveillance radars is considered. A mismatch is analysed that exists between the target movement model described in geodetic coordinates and typical model of motion in local Cartesian coordinates. In particular, the problem of estimating target course within the tracking filter using such local reference frame is analysed. Influence of the modelling mismatch on target course estimation is evaluated and quantified.