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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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Partial separation of variables applied to two p-electron calculations - spin orbit, angular momentum, energy transfer, atomic excitation
STL (Space Technology Laboratories, Inc.) has been studying, during the past year, the problems of carrying out a comet intercept mission. During the course of this study, the properties of 31 short-term comets have been examined to determine the feasibility of a mission to any of them during the next 15 years. In the process of selecting these comets, injection energies for each of these comets at a suitable launch period were determined. In addition, the distance of the earth at intercept, the transit and flight times, and the guidance requirements were evaluated. Also, to determine the effectiveness of such a mission, possible scientific instruments which could be used to measure the various characteristics of the comets have been studied. Finally, to determine the present feasibility of such a mission, the payload capability of available boosters was examined, and a spacecraft configuration with appropriate subsystems was also studied.
Launch windows for highly eccentric satellite orbits
Sequential estimation of correlated stochastic variables and application to deep space orbit determinations
Orbital space flight - trajectory analysis, orbital mechanics, perturbations, maneuvering, & rendezvous and satellite lifetime
Baker-nunn camera is used to determine satellite- orbit perturbations due to gravitational fields
Discussion of celestial mechanics and the determination of periodic orbits for lunar probes
Progress in orbit determination for artificial satellites and spacecraft
Linear perturbation technique for orbit determination and guidance correction, for earth- based guidance of unmanned lunar and interplanetary flight
The precision tracker, a simultaneous lobing, amplitude-comparison, passive, continuous-wave tracker based in principle and design upon a monopulse tracking radar, is employed at the Andover, Maine, and Pleumeur-Bodou, France, stations to find the satellite and direct the horn-reflector antennas when required and, at regular intervals during subsequent passes, to provide the precise tracking data required for prediction of future orbital parameters.
Real time tracking & orbit prediction program for circular, elliptical, & hyperbolic orbits with perturbation forces
Rectification process concerned with observation of accuracy in computation of osculating orbit
Lunar satellite orbit determination, using doppler data, optical data and range and range rate data
Linear perturbation technique for orbit determination and guidance correction for earth based guidance of unmanned lunar and interplanetary flight
Method for determining orbit of Explorer VI SATELLITE - test of dynamic model atmospheres
Space flight research - guidance, control, unsteady aerodynamics, structural dynamics, orbit theory and prediction
Periodic orbits in restricted three-body problem
Ascent from lunar surface problem with solution by variational calculus