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Four samples were studied as part of the evaluation of the component parts of the material recovered from the Surveyor 3 spacecraft. Before analyzing the samples, a calibration sample was obtained. The distribution of lunar fines on painted and polished surfaces is presented.

Experimental and theoretical studies in planetary aeronomy

Photon scattering by Ar in vacuum UV measured for cross sections

Laboratory and theoretical studies in planetary aeronomy

Determining absorption and photoionization cross sections of planetary gases - planetary aeronomy research

Photochemistry of planetary atmospheric matter, solar EUV and VUV spectral region studies, ion-molecule reactions and photoionization products, and planetary aeronomy investigations

Instrumentation and results of earth-based spectrometric identification of lunar atmospheric constituents in visible region

Photochemistry of planetary gases and planetary aeronomy

Experimental and theoretical studies in planetary aeronomy

Planetary aeronomy - photochemistry of planetary atmosphere, vacuum and extreme ultraviolet spectral regions, and theoretical aeronomy

The transmission curve of the Martian atmosphere derived by Opik is compared with transmission curves of an atmosphere containing various amounts of nitrogen dioxide. It is found that the amount of 6 x l0(exp 18) sq cm column NO2 (or even less) given by Sinton as an upper limit for the Martian NO2 content could adequately explain the phenomenon of the blue haze. This finding made it worthwhile to investigate the effect of the temperature and pressure sensitive equilibrium 2 NO2 reversibly yields N204 upon the total NO2 content and the altitude-number density distributions of NO2 and N204. Computations were carried out for surface temperatures of 273 K, 243 K, 213 K, and 183 K and for three different temperature distributions. The discussion of the results leads to the suggestion of several important new experiments.

Planetary aeronomy - ultraviolet absorption of sulfur dioxide - dissociation energies of sulfur dioxide and sulfur oxide

Planetary aeronomy - role of interplanetary debris in planetary atmospheres - sodium in atmospheres of earth, venus and mars

Planetary aeronomy - nitrogen dioxide in martian atmosphere

Planetary aeronomy - absorption and photoionization coefficients of propylene and butene-1 in vacuum ultraviolet

Planetary atmosphere studies v - photochemistry of sulfur-oxygen systems

Data were complied on the physical behavior and characteristics of plasma gas and/or dust in the context of how they relate to the self-contamination of manned orbiting vehicles. A definition is given of a systematic experimental program designed to yield the required empirical data on the plasma, neutral gas, and/or the particulate matter surrounding the orbiting vehicles associated with shuttle missions. Theoretical analyses were completed on the behavior of materials to be released from the orbiting or subsatellite shuttle vehicles. The results were used to define some general experimental design recommendations directly applicable to the space shuttle program requirement. An on-board laser probe technique is suggested for measuring the dynamic behavior, inventory, and physical characteristics of particulates in the vicinity of an orbiting spacecraft. Laser probing of cometary photodissociation is also assessed.