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Some Results of a Study of Ultra-Short-Wave Transmission Phenomena*
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1933
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RadarGeophysicsTransmission ExperimentsEngineeringPhysicsSynthetic Aperture RadarWave PropagationGeographyResidual FieldRemote SensingWave MotionGeophysical Signal ProcessingRadio PropagationEarth SciencePronounced Diffraction PatternGeodesy
The results of a series of transmission experiments made in the range 3.7 to 4.7 meters and over distances up to 125 miles are reported. These observations were chiefly confined to the region reached by the directly transmitted radiation and are found in good agreement with the assumption that such transmission consists mainly of a directly transmitted radiation plus the reflection components which would be expected from the earth's contour. The residual field not thus explained consists of a more or less pronounced diffraction pattern due to the irregularities of the earth's surface. A hill-to-hill transmission has three demonstrable reflection surfaces.