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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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Circuit with a sawtooth-modulated traveling-wave tube, which acts as a frequency converter and as an amplifier, simplifies microwave transmission. Lower power losses and reduced size and weight are also realized in this circuit.
Mission analysis of Mars soft landing with line- of-sight communication between flyby bus and entry capsule - atmospheric entry
Computational technique for constructing Liapunov functions for estimating domain of asymptotic stability of nonlinear control systems
Automatic control of two-dimensional motion of material point described by two finite difference equations
Items affecting information transmitted from payload landed on remote planet to Earth via communications satellite including orbit, transmission policy and orbit injection error effect on communication capability
Items affecting information transmitted from payload landed on remote planet to earth via communications satellite including orbit, transmission policy and orbit injection error effect on communication capability
Study has been undertaken to determine the separation criteria for a preloaded, idealized set of contacts when they are subjected to a steady-state sinusoidal excitation and when the elasticity of one contact is nonlinear. The study consists of two phases, theoretical and experimental.
Counter-divider circuit for accuracy and reliability in binary circuits
Omega Position Location Equipment /OPLE/ system, testing operational feasibility of centralized global meteorological data collection system
Satellite system applicability to earth resources data collection from in situ sensors, discussing synoptic, local time, emergency and demand data collection
Data handling method for satellite TV broadcast system design, and data analysis and plotting by computer techniques
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The power clutch presented is designed for the transfer of electrical signals and power across rotating joints. Radio noise, friction, and wear are virtually eliminated. The design, construction, and applications are discussed. This clutch eliminates the need of recycling solar arrays once each orbit by recycling only a low-inertia component of the power system.
A review was made of efforts to develop a dense telemetered microearthquake network to study earthquake mechanics along the San Andreas fault and the strain mechanics of the Kilauea Volcano. The principle elements and objectives of the ERTS-A proposal are outlined. Some of the aspects of the earthquake network and the results obtained from it as well as some promising experiments in computerized record processing are discussed.
A statistical analysis of propagation characteristics at 12 GHz for the design of a worldwide communication satellite system is reported. High power spaceborne TV transmitter design and the development of a low cost, low noise ground receiver for domestic reception are considered most important for implementation of a TVBS system.
The trajectory of an orbiting spacecraft is determined from an orbit determination program. Two inputs to this program, among others, are the range and range rate relative to some known location. The arithmetic and measurement errors in the determinations of the range, range rate, and range differences were identified and evaluated. These uncertainties are tabulated for one way and two way systems. A comparison of the measurement error contributions illustrate the predominance of thermal noise effects under low power budget conditions, with the other error sources becoming relevent for the high power budget case. The evaluated uncertainties are summarized as root sum squared noise and bias errors.
There are no author-identified significant results in this report.
There are no author-identified significant results in this report.