Computation of aircraft geometric height under radar surveillanceComputation of aircraft geometric height under radar surveillance Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2015-10-141992enA radar system for geometric height estimation of civil aircraft is described. The system consists of one standard or mode S secondary surveillance radar (SSR) and one omnidirectional antenna sited away from SSR under an airplane. The geometric height is derived by trilateration. Systematic errors are compensated for by deriving the profile of the effect on height measurements of the bias in range measurements. A curve-fitting technique is then used, which estimates both the geometric height and any non-zero systematic errorshttp://creativecommons.org/licenses/by/4.0/IEEE Transactions on Aerospace and Electronic Systems128241 - 248 Stavrakakis Georgios Σταυρακακης Γεωργιος C.M. Rekkas D.E. Manolakis C. C. Lefas IEEE Antennas, Radar Radar antennas Radar scanners radar antennas antennas radar radar scanners