Method and apparatus for determining the altitude of a signal pr

Details Method and apparatus for determining the altitude of a signal pr Method and apparatus for determining the altitude of a signal pr

1975-11-14

1977-08-09

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

325 67, 343 5W, G01R 2908

Patent

active

040414914

ABSTRACT:
A method and apparatus for determining the altitude of a transmitted signal by adding the altitude of the transmitting antenna to accumulated changes in altitude, determined in relation to the sine function of the elevation angle of the propagation path. The elevation angle of the propagation path is determined in relation to the elevation angle of the transmitting antenna and the local elevation angle change in the propagation path accumulated over the propagation range. The local elevation angle change in the propagation path is determined in relation to a dynamic, vertically dependent refractive index gradient model and in relation to a vertically dependent curvature model.

REFERENCES:
IEEE Transactions on Antennas and Propagation, pp. 132-136, Jan. 1975.
IEEE Transactions on Antennas and Propagation, pp. 794-796, Nov. 1971.

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