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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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Algorithm formulation for evaluation of strapping arrangement programs for PAM multimode commutation system of Saturn telemetry system
Multimode rectangular horn for pattern shaping and monopulse capability in Cassegrain antenna feed
Design of precision multimode telescope mounting structure with hydrostatic bearings
Effects of multimode and damping on random fatigue of cantilever beams and brackets
Improved feed synthesis using multimodes for large circular paraboloids at Parkes
Study of the shock and vibration response of a multistage structure employed analytically, lumped-mass, continuous-beam, multimode, and matrix-iteration methods. The study was made on the load paths, transmissibility, and attenuation properties along a longitudinal axis of a long, slender structure with increasing degree of complexity.
Near confocal optical resonator measurements for multimode power output of carbon dioxide laser
Anisotropic molecular liquid in optical resonator of multimode laser
Slots sitting astride the virtual wall in a multimode wave guide can be used for generation of one component of a circularly polarized beam. There is a high degree of efficiency without the use of a slow-wave structure.
Multimodality pilot model for visual and motion feedbacks derived from simulator program
Moving window analysis digital technique for complex seismic surface waves in presence of noise and multimode propagation
Aerospace sensor systems, discussing adaptive multimode sensors and multispectral sensing, electronic recognition of image components, laser radar and Raman scattering technique
Multiple filter technique for seismic multimode dispersed signals, checking time and frequency resolution by diagnostic diagram
Adaptive local algorithm and convergence speed of multimodal multidimensional function
Radiometric method for calibrating loss of multimode antenna-feed components with linear or circular polarization, deriving calibration and error analysis equations
System has high radiation efficiency and minimal interaction between elements when inserted between a multimode, multifrequency transponder and a parabolic reflector in an airborne communications system.
A proposed S-band radiometer for determining the ocean surface temperature with an absolute accuracy of + or - 1 Kelvin and a resolution of + or - .1 Kelvin was placed under the Advanced Applications Flight Experiment for further development into Nimbus readiness state. The results of assessing the following are described: effects due to the state of the sea surface, effects caused by the intervening atmosphere, and effects associated with imperfections in the instrument itself. An extensive sea truth program is also described for correlation of aircraft test flight measurements or of satellite remote measurement to in-situ data. An improved radiometer design is a modified Dicke-switch type with temperature stabilized, microwave integrated circuit, front-end and with a pulsed injection-noise nulling system. The radiometer has a multimode rectangular horn antenna with very low ohmic losses and a beam efficiency of 98% or better.
A brief description of results obtained in the continuing investigations is presented. The following areas are covered: (1) the development of the third-order, multimode theory to study the behavior of large amplitude transverse instabilities, (2) nonlinear axial mode instability, and (3) the influence of the functional form of the unsteady combustion response function upon the stability characteristics of rocket motors. Also a study was begun to improve the second order potential theory in order to provide a better approximation to the nozzle boundary condition.