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Test results from a tower VOR over a forest area

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2 Author(s)
Feyer, L.H.W. ; Bundesanstalt für Flugsicherung, Frankfurt/Main, West Germany ; Nattrodt, K.

An analysis of the performance of tower VOR in a forest area is made, and the mathematical relations between tower height, counterpoise dimensions and reflecting objects are presented. Various propagation phenomena affecting the performance of such tower VOR antennas and a review of the compromises required to achieve satisfactory radiation of signals to various parts of the vertical pattern characteristic are discussed. Practical results of tests on a tower VOR installation near Frankfurt aerodrome, Germany, are given, along with data on seasonal effects upon course interference.

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Aerospace and Navigational Electronics, IEEE Transactions on  (Volume:12 ,  Issue: 1 )