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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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Epitaxial gallium arsenide diode junction formed in a crossed waveguide structure operates as a variable reactance harmonic generator. This varactor diode can generate power efficiently in the low-millimeter wavelength.
Improved numerical procedure for harmonically deforming lifting surfaces from supersonic kernel function method
Nonzonal harmonics of earth gravitational field determined by satellites
Harmonic ion cyclotron wave propagation and attenuation investigated experimentally
Harmonic mixing and heterodyne detection of laser radiation
Electron-cyclotron harmonic resonances interactions in RFF excited electrodeless helium discharges, discussing magnetic field position measurement and plasma simulation
Harmonic distortion analyzer effects rapid and accurate setup and calibration of magnetic tape instrumentation recorders. The analyzer is portable, requires no warmup period and need not be calibrated for normal usage. Average setup time with this analyzer is approximately 30 seconds per track.
Resonant gravity harmonics of synchronous satellites
Geomagnetic harmonic series evaluation for 1100 kilometers altitude using satellite observations
Higher spatial harmonics of magnetic field in induction magnetohydrodynamic generator
Photographic and Doppler tracking of geodetic satellites to determine tesseral harmonics of earth gravitational fields
Combined solution for low degree longitude harmonics of gravity from twelve and twenty-four hour satellites
Coefficients of zonal spherical harmonics in geopotential from reduced Baker-Nunn data for 10 satellites
Wave interference effects for forced harmonic oscillator transitions between unperturbed states
Satellite orbit secular perturbations resulting from central body oblateness for 2m-th zonal harmonics and gravitational attraction of third body
Homogeneous triaxial ellipsoid Newtonian potential expansion in series of tesseral harmonics
Vector functions expansions in spherical harmonics of directions of individual vectors
Second and fourth order sectorial harmonics determined for geopotential from long term perturbations on 12 hr satellites