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Giorgi, G. (author), Teunissen, P.J.G. (author), Verhagen, S. (author), Buist, P.J. (author)Integer ambiguity resolution is the key to obtain very accurate positioning solutions out of the GNSS observations. The Integer Least Squares (ILS) principle, a derivation of the least-squares principle applied to a linear system of equations in which some of the unknowns are subject to an integer constraint,was demonstrated to be optimal among...conference paper 2009