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Measurements of the Coherence Ratio of Ionospherically Propagated Radio Waves
Author(s) -
Whale H. A.,
Boys J. T.
Publication year - 1968
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1002/rds1968310977
Subject(s) - specular reflection , coherence (philosophical gambling strategy) , radio wave , ionosphere , phase difference , physics , mathematics , optics , phase (matter) , geophysics , quantum mechanics
Phase difference measurements made with an accuracy of 5° between pairs of antennas separated by up to 150 yards in three directions (N, E, and SW) show that radio waves reflected from the ionosphere are generally not sufficiently stable in direction for any particular component to be regarded as being specular in the usual sense. It is concluded that the coherence ratio should be regarded as equal to zero except in very special one‐hop cases. The equipment used for the measurements is described in general form.