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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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Azimuthal sampling of electron flux on spinning satellite provide direction and magnitude of energetic electron space gradients at trapping magnetospheric boundaries
Graphic method of determining rocket attitudes by plotting data obtained by fluxgate magnetometers and solar aspect sensors utilizes polar coordinates. Polar graph paper is used to represent either the horizon system of altitude and azimuth or the celestial system of declination and right ascensions.
Injection and containment of electron clouds in azimuthally symmetric, toroidal apparatus
Drift waves parametric excitation in resistive plasma derived from fluid equations, assuming plane geometry with periodic boundary conditions in magnetic field and azimuthal directions
Pulsars observed for average energies at centimeter wavelengths, using azimuth elevation antenna
M-87 X ray luminosity from balloon-borne detectors, considering background counting rate relation to azimuth
Scanning method involves separation of scanning capability into two independent degrees of freedom. One degree of freedom corresponds to azimuthal scanning and other to elevation scanning on spiral coordinate axes. Scanning of both prime-feed and mirrored patterns is accomplished with reduction of mechanical vibration damage to large antennas.
The Laser Tracking and Ranging System (LTRS) is an optical tracking radar that uses a gallium-arsenide injection laser as the transmitting source. The system is designed to track a small retrodirective corner-reflector array and to provide continuously the range, azimuth, and elevation of the array's position relative to the tracking unit. The development effort was directed toward providing a small, compact and relatively lightweight instrument mainly as a part of the Lunar Surveying System for tracking an astronaut's staff. A number of other applications considered include the LTRS as a navigation instrument for a Lunar Flying Vehicle and as a crew safety device for monitoring an astronaut's situation during any EVA operations.
Instruments for platforms stability determination, considering azimuth, tilt rotation and translational motion
Real time network support simulation allowing network configuration for nominal or perturbed trajectory for Saturn vehicles, applicable to any flight azimuth
F 2 region anisotropic response to individual internal gravity waves as function of propagation azimuth
Monopulse tracking system with antenna array of three radiators for deriving azimuth and elevation indications
Tracking mount for laser telescope employed in tracking large rockets and space vehicles to give information regarding azimuth and elevation
Polarized light multiple scattering in planetary atmospheres, applying extended doubling method to realistic simulations with allowance for radiation polarization and azimuth dependence
Magnetostatic sunspot model with twisted field showing radial dependence of azimuthal component
P times least squares analysis complications by systematic earthquake location errors and azimuthal station anomalies variation
Experimental data were combined with one-dimensional conservation relations to yield information on the energy deposition ratio in a parallel-plate accelerator, where the downstream flow was confined to a constant area channel. Approximately 70% of the total input power was detected in the exhaust flow, of which only about 20% appeared as directed kinetic energy, thus implying that a downstream expansion to convert chamber enthalpy into kinetic energy must be an important aspect of conventional high power MPD arcs. Spectroscopic experiments on a quasi-steady MPD argon accelerator verified the presence of A(III) and the absence of A(I), and indicated an azimuthal structure in the jet related to the mass injection locations. Measurements of pressure in the arc chamber and impact pressure in the exhaust jet using a piezocrystal backed by a Plexiglas rod were in good agreement with the electromagnetic thrust model.
Processes which occur within the region between approximately 2 solar radii and 25 solar radii, which is called the solar envelope and the effect on the solar wind as seen at 1 AU are discussed. In the envelope the wind speed becomes supersonic and super-Alfvenic, the magnetic energy density is larger than the flow energy density, and the magnetic energy density is much larger than the thermal energy density. Large azimuthal gradients in the bulk speed are expected in the envelope, but the stream interactions near the outer edge of the envelope are probably relatively small. Cosmic ray observations suggest the presence of hydromagnetic waves in the envelope. The collisionless damping of such waves could heat protons out to approximately 25 solar radii and thereby cause an increase in V and T sub p consistent with the observed T sub p -V relation. A mechanism which couples protons and electrons would also heat and accelerate the wind. Alfven waves can accelerate the wind in the envelope without necessarily causing heating of protons; the Lorentz force might have a similar effect.