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Foreword by E Rechtin
Basic Constraints of Space Communications
by E Rechtin
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achieved altitude amplifier amplitude antenna gain aperture aperture efficiency application approximately axis bandwidth battery beam buffer amplifier carrier cent channel characteristics charge circuit communication system components crystal crystal oscillator cycle detector device earth effect efficiency electric electrons energy equipment error feed filter frequency function ground station input instruments ionization ionosphere linear magnetic field magnetometer maser maximum mcps measurements megacycles modulation Nimbus noise figure noise temperature operation orbit oscillator output paddles parameters particles pattern payload performance phase noise phase-lock loop Pioneer polarization probe problem produce protons pulse radiation radio range ratio receiver recorder region sample satellite sensors shown in Fig signal silicon solar cells sources space communications spacecraft spectral density spectrum spin subcarrier subsystem surface synchronization tape techniques telemeter telemetry thermal tion tracking transistor transmission tube varactor vehicle velocity voltage volts watts waveform