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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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Signal acquisition and tracking system covering a wide range of frequencies uses a digital circuit to sample the frequency of an incoming signal and provide correction pulses to the voltage-controlled oscillator. The circuit can also sense the presence of a signal on any one of the input lines.
Dynamic programming applied to guidance correction for perturbed trajectory of spacecraft
Temperature correction procedure for atmosphere model calculation
Wind tunnel wall effects and wall corrections for vertical short takeoff and landing tilt-wing model with flap
Optimum correction of distorted thrust transient measurements
Second quantum corrections to phase shift in collision between particles with spherically symmetric potentials
Quantum corrections to transport collision integrals
Geopotential tesseral harmonics coefficients and tracking station coordinate corrections estimated from Baker-Nunn camera satellite observations
Parameters of Fermi gas formula using pairing and shell correction energies, noting neutron and protron resonances
Adaptive guidance correction policy developed from dynamic programming point of view for perturbed trajectory of spacecraft
Corrective circuit prevents the appearance of erroneous output signals from the possible failure of any single-channel element interconnected in parallel binary information channels. The circuit is simplified and economical because it does not use redundant channels.
Second order corrections to first order ray theory of wave propagation through ionosphere as applied to Beacon satellite transmission studies
Differential correction and preliminary orbit calculation for lunar satellite orbits
Linear guidance equations for impulse velocity corrections in space missions
Midcourse attitude correction for injection and guidance errors for Jupiter flyby mission
Earth and sun occultation data evaluation for use in differential correction of lunar satellite orbit
Powered flight maneuver data used to reduce state vector uncertainties for lunar satellite orbit differential correction
Two-antenna interferometer for absorption correction of low frequency ionospheric radio observations