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Geolocation with three or more unmanned aerial vehicles (UAVs) based on time-difference-of-arrivals (TDOA) is possible but has implementation problems including UAV trajectory optimization, measurement association, and communication bandwidth limitations. The complexity of each of these problems is manageable with a simpler system of two netted UAVs that processes multiple TDOA measurements collected...
This paper considers the recursive estimation of emitter location using time difference of arrival measurements formed by the correlation of signals received by two unmanned aerial vehicles. The time difference of arrival measurement defines an hyperbola of possible emitter locations. This hyperbola is used as a measurement in a nonlinear Alter. The performance of two such filters, an extended Kalman...
This paper addresses the problem of designing objective functions for autonomous surveillance-target search & tracking (S&T) - by unmanned aerial vehicles (UAVs). A typical S&T mission inherently includes multiple, most often conflicting, objectives such as detection, survival, and tracking. A common approach to cope with this issue is to optimize a convex combination (weighted sum) of...
Ground target tracking using electro-optical and infrared video sensors onboard unmanned aerial vehicles has drawn a great deal of interest in recent years due to the evolution of inexpensive video sensors and platforms. We present algorithms for geolocation using pixel location measurements which are based on the perspective transformation and includes radial and tangential lens distortions. The...
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