Aerospace & Aviation

Environmental testing for scientific satellite reliability

This report represents the results of a study of coplanar earth-moon transits. The study was initiated to provide information concerning coplanar geometrical characteristics of earth-moon trnasits. The geometrical aspects of transit behavior are related to variations injection conditions. The model of the earth-moon system used in this investigation is the Jacobian model of the restricted three body problem. All transits considered in this study are restricted to the moon-earth plane (MEP).

Space vehicle configuration effects on structural bending frequencies and aerodynamic stability

Thermal radiation from hot gases - simulated atmospheres of mars and venus

Unmanned spacecraft guidance from earth based station - optimal control and orbit calculations

Perturbation theory applied to laguerre functions

Hydrostatic buckling pressure calculations for spherical shells

Solar radiation pressure effect on explorer xii rotation

Elastic state determination of thermal stress in thin, flat plate of finite dimensions

Human qualifications - selection and training for space flight

Space sciences for interplanetary travel - space radiation, satellites and extraterrestrial life

Because of the extremely low density of the gas in Interplanetary space, the most important remaining mode of external heat transfer Is radiation. Studies of this phenomenon in its multiple ramifications are being made presently and will continue In both theoretical and experimental areas. These experiments should, most desirably, be made under conditions which duplicate outer space; otherwise, errors may be introduced which cannot be estimated and will only be discovered in the actual environment. Many facilities are presently available which will reproduce the space environment only approximately[1,2]. The facility which will be discussed here has as its goal, at least for the phenomena connected with radiation heat transfer, the provision of conditions in space as accurately as they are known. The conditions to be reproduced are: (1) the solar electromagnetic radiation spectrum; (2) the low pressure and density of space (∼10-14 mm Hg); and (3) the black radiation sink of space (4°K).

Influence of room-temperature atmospheric reaction products on ductility of sodium chloride single crystals

Role of engineering in space program

Lithium and beryllium abundance in meteorites and solar atmosphere