Accurate Target Geolocation using Cooperative Observers

We consider the problem of geolocating a target using relatively simple ground-based sensors with a high degree of accuracy. We show that by using cooperative receivers, it is possible to achieve the desired level of accuracy for a stationary target by utilizing time difference of arrival measurements. We then extend this approach to provide a recursive solution for tracking moving targets using the unscented Kalman filter. Simulation results indicate improved performance over traditional geolocation results with a single receiver.