Effect of ion engine exhaust on telemetry systems.
Effects of ion engine exhaust fluctuations on signal phase and amplitude modulation in antenna radiation field
SIGNAL TRANSMISSION↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Superposition in a class of nonlinear systems.
Nonlinear systems satisfying generalized principle of superposition, noting application to feedback control
SIGNAL TRANSMISSION↗
Optimum coherent amplitude demodulation.
Amplitude modulation-demodulation techniques compared, based on two classes of modulating spectra
DATA TRANSMISSION↗
Some useful expressions for optimum linear filtering in white noise.
Optimum linear filter for message extraction from additive white noise
SIGNAL TRANSMISSION↗
Resonances of the earth-ionosphere cavity observed at cambridge, england.
Resonant modes of electromagnetic field in dielectric cavity between Earth and ionosphere
POWER SPECTRUM↗
Lunar orbiter - a photographic satellite.
NASA program providing unmanned photographic spacecraft into lunar orbit, processing image onboard and then transmitting it as signals to Earth
NASA PROGRAM↗
Variations in the total electron content of the ionosphere at mid-latitudes during quiet sun conditions
Faraday rotation effect on satellite signals used to determine ionospheric electron content at midlatitudes during quiet sun conditions
IONOSPHERIC ELECTRON DENSITY↗
Diversity-lock phase demodulator
Synchronous diversity-lock phase demodulator for tracking and demodulating orthogonally polarized signals transmitted from satellites
SIGNAL TRANSMISSION↗
Comparison of spectra of single sideband and phase modulated signals
Comparison of spectra of single-sideband and phase modulated signals
SINGLE-SIDEBAND MODULATION↗
Signal design for space communication channels, part I
Optimized signal design for space communication channels based on minimizing error probability
SIGNAL TRANSMISSION↗
A study of Apollo antenna and signal performance in certain atmospheres Final report, 21 Sep. 1965 - 21 Apr. 1966
Polarization effects and signal transfer studied in analysis of Apollo spacecraft telecommunications link
SIGNAL TRANSMISSION↗
Ionospheric Effects on 400 Mc Radar Signals
Effects of ionosphere on 400 Mc radar signals sent vertically downward from satellite - time delay and virtual height, attenuation factor, and Faraday rotation
SIGNAL TRANSMISSION↗
A space communication study Progress report, 15 Sep. 1966 - 15 Mar. 1967
Space communications studies of optimal signal reception, threshold extension, signal detection against noise, channel simulation, and synchronization techniques
OPTIMIZATION↗
Cruft Laboratory Semiannual progress report, 1 Jul. - 31 Dec. 1966
Very low frequency signal propagation, electron and solid state physics, automatic control processes, communications and networks, ferromagnetism, and electromagnetic waves
SIGNAL TRANSMISSION↗
Very low frequency propagation
Diurnal average and standard deviation of phases in modulated very low frequency signals
PHASE MODULATION↗
Calculation of signal margins for the CSM UNIFIED S-band downlink channel Apollo AS-202 to aircraft NASA 432
Signal margin calculation procedures for CSM UNIFIED S-BAND downlink channel Apollo AS-202 TO aircraft NASA 432
SIGNAL TRANSMISSION↗
Heterodyne phase shifter with inductive delay line pickup provides stepless phase shift
Heterodyne phase shifter with inductive delay line pickup providing stepless phase shift
PHASE SHIFT↗
The future potentials of navigation satellites.
Navigation satellites of next decade, discussing services for air and sea intercontinental transportation vehicles
SPACE COMMERCIALIZATION↗