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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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Articles in space sciences and lunar and planetary exploration in support of NASA research and technology program
Space dynamics and control systems, spacecraft and subsystems, sensors, general electronics, environmental testing, tracking systems, and orbit determination
Communications research and development engineering for deep space station network operations
NASA Space Science Program, discussing flight schedules, spacecraft under development, biosciences, geophysics, astronomy, lunar and planetary program and construction of facilities
Factors in operation of manned space chambers - ASTM Symposium, Seattle, October-November 1965
Radiation hazards of interplanetary space and related shielding problems
Vacuum, electron, proton, and ultraviolet radiation stress results for space vehicle materials
NASA space astronomy program
Advanced communications techniques and control capability studies for Deep Space Network
Advanced development and research on lunar exploration, bioscience, and manned space sciences
Deep Space Network research on tracking and navigation accuracy, communications, facility engineering and equipment, and multiple mission telemetry system
Manned space flight predicted exposure effects vs actual medical findings
Ionizing radiation poses a significant risk to humans living and working in space. The major sources of radiation are solar disturbances and galactic cosmic rays. The components of this radiation are energetic charged particles, protons, as well as fully ionized nuclei of all elements. The biological effects of these particles cannot be extrapolated in a straightforward manner from available data on x-rays and gamma-rays. A radiation protection program that meets the needs of spacefaring nations must have a solid scientific basis, capable not only of predicting biological effects, but also of making reliable estimates of the uncertainty in these predictions. A strategy leading to such predictions is proposed, and scientific requirements arising from this strategy are discussed.
There were 35 volunteers who responded when they first perceived an increase in apparent size of a collimated, two-dimensional perspective image of an Orbiter vehicle. The variables of interest included the presence (or absence) of a fixed reticle within the field of view (FOV), background starfield velocity, initial range to the vehicle and vehicle closure velocity. It was found that: 1) increasing vehicle approach velocity yielded a very small (but significant) effect of faster detection of vehicle movement, nevertheless, response variability was relatively large; 2) including the fixed reticle in the FOV produced significantly slower detection of vehicle radial movement, however this occurred only at the largest range and the magnitude of the effect was only about 15% of the one sigma value; and 3) increasing background star velocity during this judgment led to slower detection of vehicle movement. While statistically significant, this effect was small and occurred primarily at the largest range. A possible explanation for the last two findings is that other static and dynamic objects within the visual field may compete for available attention which otherwise would be available for judging image expansion; thus, the target's retinal image has to expand more than otherwise for its movement to be detected. This study also showed that the Proximity Operations Research Mockup at NASA/Ames can be used effectively to investigate a variety of visual judgment questions related to future space operations. These findings are discussed in relation to previous research and possible underlying mechanisms.
The first Space Very Long Baseline Interferometry (VLBI) mission VSOP has been successfully operated since 1997 and several follow-on missions are in development or under discussion.
The use of wireless power transmission in Space Solar Power activities creates significant policy issues regarding the beam right-of-way.
This October, NASA will take a revolutionary step with the launch of the New Millennium program's Deep Space One (DS1) mission. DS1 will fly by asteroid 1992KD in July of 1999 and will then be on a trajectory toward comet 19P/Borrelly.
Projections indicate that in the future the number of NASA's robotic deep space missions is likely to increase.