LIST OF ILLUSTRATIONS Figure Page 2-1 Microwave Power Transmission Systems Study Program Organization 2 2 2-2 Work Breakdown Structure 2-4 2-3 MPTS Schedule 2-5 3-1 Atmospheric Absorption by the 1. 35-cm Line of Water Vapor for a Mean Absolute Humidity of 7. 75 g/m3 and by the 0.5 cm Line of Oxygen at a Temperature of 20°C and a Pressure of One Atmosphere 3-3 3-2 Zenith Attenuation Versus Frequency 3-4 3-3 Comparison of Gaseous Absorption and Rain Attenuation 3-5 3-4 Transmission Efficiency - Molecular Absorption and Rain 3-8 3-5 Rainfall Rate in a Thunderstorm, North-South Section 3-9 3-6 Rainfall Rate in a Thunderstorm, East-West Section 3-10 3-7 Transmission Through Very Heavy Rain (Elevation 40 Degree Angle) 3-10 3-8 Phase Scintillations 3-14 3-9 Typical Gaussian Model Results of Density Correlation 3-15 3-10 Path of a Straight Line Ray from a Geostationary Satellite to a Midlatitude Receiving Site 3-22 3-11 Diurnal and Seasonal Variation in Faraday Rotation and Polarization Mismatch "Loss" 3-23 3-12 Variation in Total Electron Content During a Magnetic Storm 3-25 4-1 Amplitron Assembly 4-3 4-2 5 kW Amplitron Parameters 4-3 4-3 Amplitron Current and Voltage Levels for Various Magnetic Field Levels 4-6 4-4 Power Level Versus Frequency 4-10 4-5 Amplitron Weight/Cost/Efficiency Versus Frequency 4-10 4-6 Anode Radiator Diameter Versus Frequency 4-11 4-7 Anode Radiator Weight Versus Frequency 4-12 4-8 Tube Dimensions Versus Frequency 4-12 4-9 Magnetic Field Intensity Versus Frequency 4-13 4-10 Dissipated Power Density Versus Frequency 4-13
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