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Pfeiffer, S.U. (author), de Wagter, C. (author), de Croon, G.C.H.E. (author)We present a computationally efficient moving horizon estimator that allows for real-time localization using Ultra-Wideband measurements on small quadrotors. The estimator uses only a single iteration of a simple gradient descent method to optimize the state estimate based on past measurements, while using random sample consensus to reject...journal article 2021