Satellite measurement of atmospheric structure by stellar refraction
Satellite measurement of atmospheric structure by stellar refraction, starlight transmission through atmosphere, and background sky brightness
TRANSMISSION↗
SEARCH · Engineering Papers
Results for “Refraction”
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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Index of refraction of helium in the shielding approximation.
Refraction index for helium isoelectronic sequence, using frequency dependent dipole polarizability
QUANTUM THEORY↗
Refraction of sound from a point source placed in an air jet.
Jet velocity, temperature and source frequency effects on refraction of sound from harmonic point source in subsonic air jet
REFRACTION↗
The refractive index of helium.
Helium refractive index for wavelengths above 600 angstroms calculated by variational method
HELIUM↗
Angular dependence of the refractive index in the ionosphere.
Graphical method of determining dispersion properties of anisotropic medium, using angular dependence of refractive index
IONOSPHERIC PROPAGATION↗
The refractive characteristics and intraocular tensions of colony chimpanzees Technical report, Aug. 1965
Refraction and intraocular pressure tests of colony chimpanzees - age relationship
REFRACTION↗
Refraction of sound by jet flow or jet temperature
Refraction of sound by jet flow or jet temperature
JET FLOW↗
Experiments on the effects of atmospheric refraction and airplane accelerations on sonic-boom ground-pressure patterns
Effects of atmospheric refraction and supersonic aircraft accelerations on sonic boom ground-pressure patterns
PRESSURE DISTRIBUTION↗
Interferometric measurement of large indices of refraction.
Interferometric measurement of large indices of refraction, noting applicability and accuracy
MICHELSON INTERFEROMETER↗
Estimating Refractive Index Spectra in Regions of Clear Air Turbulence
Estimation of refractive index spectra in regions of clear air turbulence
REFRACTIVE INDEX↗
Refraction of sound by jet flow and jet temperature. Extension of temperature range parameters and development of theory
Refraction of sound field of omnidirectional pure tone point source by temperature and velocity fields of 3/4-inch air or nitrogen jet
SOUND MEASUREMENT↗
Global analysis of seismic refraction measurements.
Seismic refraction measurements, computing statistics for depth to Moho, crustal thickness and upper mantle velocity for geographical and geological provinces
EARTH CRUST↗
Reflection and refraction of electromagnetic waves by a moving dielectric medium.
Plane electromagnetic wave reflection and refraction by semiinfinite dielectric medium moving uniformly parallel to surface analyzed for arbitrary incidence plane orientation
DIELECTRIC PERMEABILITY↗
Scattering theory of absorption-line profiles and refractivity.
Attenuation cross section and refractive index using collision theory, calculating resonance profiles of autoionizing lines based on scattering theory
SCATTERING MATRIX↗
Amplitude distributions of refractive index differences.
Amplitude distributions of refractive index differences showing spikes superimposed on variations continuum due to water vapor clustering
WATER VAPOR↗
Lens Design Using Group Indices of Refraction
An approach to lens design is described in which the ratio of the group velocity to the speed of light (the group index) in glass is used, in conjunction with the more familiar phase index of refraction, to control certain chromatic properties of a system of thin lenses in contact. The first-order design of thin-lens systems is illustrated by examples incorporating the methods described.
optical glass interferometry ultrashort pulses↗
Asronomical refraction: Computational methods for all zenith angles
It is shown that the problem of computing astronomical refraction for any value of the zenith angle may be reduced to a simple, nonsingular, numerical quadrature when the proper choice is made for the independent variable of integration.
Computing numerical methods refractions↗
Refractive Imaging of Air Shock Above Microscale Defects in Pentaerythritol Tetranitrate (PETN) Films
Physical vapor deposition (PVD) of high explosives can produce energetic samples with unique microstructure and morphology compared to traditional powder processing techniques, but challenges may exist in fabricating explosive films without defects. Deposition conditions and substrate material may promote microcracking and other defects in the explosive films. Here, we investigate effects of engineered microscale defects (gaps) on detonation propagation and failure for pentaerythritol tetranitrate (PETN) films using ultra-high-speed refractive imaging and hydrocode modelling. Observations of the air shock above the gap reveal significant instabilities during gap crossing and re-ignition.
36 MATERIALS SCIENCE↗