Seismic refraction profiles of the ash flow in the Valley of Ten Thousand Smokes, Katmai National Monument, Alaska
Seismic refraction profiles of ash flow in Valley of Ten Thousand Smokes, Alaska, obtaining P wave velocities
Forbes, R. B.↗
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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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Astronomical refraction at millimeter wavelengths
Millimeter wave and optical astronomical refraction differential measurements, showing dependence on atmospheric water vapor
Cogdell, J. R.↗
Biosystems engineering research. Volume 4 - Augmentation of the focus control system of the human eye through index of refraction variation of liquid crystals materials Final report, 15 Mar. 1969 - 31 Jun. 1970
Augmentation of human eye focus control by varying index of refraction with nematic liquid crystals
Edgerton, R. H.↗
NASA minitrack interferometer refraction corrections
Influence of atmospheric refraction on minitrack interferometer system and correction procedures for computation accuracy
Schmid, P. E., Jr.↗
A cursory examination of the sensitivity of the tropospheric range and Doppler effects to the shape of the refractivity profile
Ray tracing techniques for examination of refractivity profile sensitivity in tropospheric range and Doppler effects on profile shape
Chao, C. C.↗
Surface refractivity measurements at NASA spacecraft tracking sites
Results of world wide surface refractivity test conducted in support of Apollo program
Schmid, P. E.↗
Water-depth measurement by wave refraction and multispectral techniques
Shallow ocean depth measurements by aerial photographs of wave refraction and wavelength changes and by multispectral scanning of wave reflection
Brown, W. L.↗
Measurement of the refractive index and dispersion of an unpolished sample on an Abbe refractometer
Transparent solids unpolished samples refractive index and dispersion measurement using Abbe refractometer
Heinemann, H. M.↗
Comparison of tektite population polygons of bulk specific gravity, true material specific gravity, and refractive index
Australian tektites population polygons of bulk specific gravity and refractive index, indicating variations in chemical composition
Scheiber, L. C.↗
Plasma refractive effects in HCN lasers
Plasma refractive index effects in pulsed HCN lasers, calculating stable cavity mirror curvatures constriction as function of electron density by ray matrix approach
Mccaul, B. W.↗
Measurements of the refraction and diffraction of a short N wave by a gas-filled soap bubble
Short N wave refraction and diffraction by gas- filled soap bubble, discussing measurements to explain peaking and rounding in sonic boom pressure signature
Blackstock, D. T.↗
Refractive index of aqueous HCl solutions and the composition of the Venus clouds
Aqueous HCl solutions refractive index calculation from concentration dependence for Venus clouds composition
Lewis, J. S.↗
Some consequences of critical refraction in the Venus atmosphere
Venus atmosphere critical refraction model, examining optical effects and ray paths
Snyder, C. W.↗
The refraction correction in light scattering
Refraction correction in photometer with cylindrical light scattering cell and detectors, describing experimental testing by mathematical and geometrical analysis
Billmeyer, F. W., Jr.↗
Ionospheric refraction corrections in satellite tracking
Ionospheric refraction errors in satellite tracking, computing elevation, range and range rate corrections
Bent, R. B.↗
Refractive index and birefringence of 2H silicon carbide.
Measurement of the refractive indices of 2H SiC over the wavelength range from 435.8 to 650.9 nm by the method of minimum deviation. A curve fit of the experimental data to the Cauchy dispersion equation yielded, for the ordinary index, n sub zero = 2.5513 + 25,850/lambda squared + 8.928 x 10 to the 8th power/lambda to the 4th power and, for the extraordinary index, n sub e = 2.6161 + 28,230/lambda squared + 11.490 x 10 to the 8th power/lambda to the 4th power when lambda is expressed in nm. The estimated error (standard deviation) in these values is plus or minus 0.0006 for n sub zero and plus or minus 0.0009 for n sub e. The birefringence calculated from these expressions is about 20% less than previously published values.
Powell, J. A.↗
Tropospheric refraction effects on satellite range measurements.
A model for predicting the atmospheric effect for earth-to-orbit range or range-rate measurements is described. The model treats the dry and wet components of refractivity (N) as different functions of its surface value and of height above the earth. It provides a zenith integral of the dry component that is consistent with the equation for the zenith range effect in dry air. For low angle use, it gives a reasonable approximation of observed N profiles. The use of the model is discussed, and data and computed positions without and with a correction for the troposphere are presented.
Hopfield, H. S.↗
Refractive index of He in the region 920-1910 A
The refractive index of He has been determined in the region 920-1910 A by measurements of wavelength shifts in a 3-m spectrograph alternately filled with He and evacuated. Differential pumping systems were used to allow operation of the light source at conveniently low pressures. Several plates were measured and analyzed in order to reduce statistical errors. The results at 919 A agree with the theory within 1%, i.e., less than the experimental error.
Huber, M. C. E.↗