Annual Report of the Director

Annual Report of the Director

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have a few hours per night of useful recording through the ionospheric aquot;windowaquot; at 18.5 mc. ... The determination of antenna aperture requires knowledge of the antenna polar diagram and the efficiency of the reflecting surface. Our absolute measurements are being made with the simplest of antennas a€” dipoles a€” mounted over a large grid of reflecting wires. ... Comprehensive tests have been conducted to intercompare the noise power of conventional noise diodes with that ofanbsp;...

Title:Annual Report of the Director
Author:Carnegie Institution of Washington. Dept. of Terrestrial Magnetism
Publisher: - 1955


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