Improving Groundwater Imputation through Iterative Refinement Using Spatial and Temporal Correlations from In Situ Data with Machine Learning
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Astronomical unit determination from results of radar observations of venus
Mathematical model for lunar librational motion
Optical section using xenon or mercury-xenon arc lamp source for solar simulator
Reissner-type equations for linear stress distribution determination through plate thickness
Finite displacements of very shallow orthotropic shells and plates at small deformations
Strain components on middle surface of thin shells determined by variational principles of linear moment theory
Optical location of moon in Earth-Moon system using artificial light reflector, on lunar surface
Theory on earth shape, considering surface of geoid assumed as equipotential surface at sea level, obtaining relations between zonal and tesseral harmonics coefficients
Reduced pressure effects on fatigue life of roller steel ball bearings with mineral oil lubricants
Triangular plate bending element using Herrmann variational method, deriving matrices for finite elements
Mathematical model for statistical probability of internal microbial spacecraft contamination
Potassium turboalternator preliminary design, turbogenerator layout
Satellite to satellite Doppler tracking with high resolution of gravity field
Architectural design of spaceborne computer system operating in multi-element configuration
A process for making ferromagnetic films with high permeability and development of the technology for fabricating a magnetic head using these films are reported. An interim head was successfully built, tested, and delivered for evaluation and a process for sputtering high permeability films has been developed. Two heads with deposited pole tips have been tested and delivered. One had a 0.0001 inch gap and the other a 0.0003 inch gap. Both heads were boned with epoxy but served to test the geometry of the head design.
When sections are being welded, operator varies pulse rate of power supply and simultaneously monitors signal on oscilloscope until rate is found which produces maximum arc gas voltage. Remainder of welding is performed with power supply set at this pulse rate, producing desired maximum weld puddle agitation and fine uniform weld of grain structure.
The question of what resolution of the gravity field can be obtained from satellite-to-satellite Doppler tracking was investigated by performing least-squares adjustments of simulated Doppler data, solving for parameters describing the anomalous gravity field in various sized blocks. By examining the correlation between the adjusted parameters describing neighboring blocks, it was possible to judge whether a given set of data was capable of resolving blocks of a given size. Two concepts of satellite-to-satellite tracking are considered: the first involves two satellites near together in very low orbits, while the second uses geostationary satellites to track a single very low satellite. In either case, blocks 500 km on a side can be satisfactorily resolved from an orbital altitude of 700 km. From an altitude of 200 km, blocks 200 km on a side can be resolved. Because of the lower limit on altitude imposed by the presence of the earth's atmosphere, it does not appear that satellite-to-satellite Doppler tracking will be able to resolve features smaller than 200 km on a side.