Air Target Measurement Accuracy In The Presence Of Ground Clutter
Johan Engblom · Chalmers Publication Library (Chalmers University of Technology) · 2009
Target tracking algorithms in radar systems have to operate in an environment of measurement uncertainty.A condition for good target tracking in a radar system is that a target position can be estimated and the measurement accuracy can be determined.The main problem is that clutter cannot be well defined by a stationary stochastic process and there is no known general model that works in different clutter environments.A mobile radar system is often presumed to be able to function in various environments such as: Sea, littoral regions, mountainous terrain, flatland and deserts.By using a target simulator with the actual radar system and a true clutter environment, a large amount of field data, is recorded during different system settings.These recordings are then used to estimate the systems measurement accuracy.The result is a fine-tuned algorithm of the measurement accuracy.The algorithm is evaluated and compared to the current system implementation using a target in a real clutter environment.The proposed model is shown to improve the accuracy estimations by 7 times compared to the current model in the elevation coordinate.An improvement of 3 times could be identified in the azimuth coordinate.