Accession Number : AD0633999

Title :   ENGINEERING MODEL ATMOSPHERE OF MARS,

Corporate Author : RAND CORP SANTA MONICA CALIF

Personal Author(s) : Schilling,Gerhard F.

Report Date : SEP 1962

Pagination or Media Count : 18

Abstract : The planning of the exploration of Mars by means of space vehicles imposes demands on our knowledge of the atmosphere of Mars which go beyond the concepts of 'best values' or 'most likely conditions.' In view of the present scarcity of reliable data, a theoretical model of the Martian atmosphere is offered here which instead gives the limiting conditions to be encountered. This model atmosphere gives extreme upper and lower probable limits of pressure, temperature, and density up to 150 km altitude over middle and low latitudes, independent of time of day or season. In addition, a number of parameters are tabulated which are of concern for the engineering design of entry probes. The mathematical method was based on the present factual knowledge with a minimum of assumptions and has therefore yielded results on a rather high confidence level. This has been achieved in part through an extremely wide spread of values. Nevertheless, a combination of circumstances makes it apparent that the engineering task of atmospheric entry will be easier for the Martian atmosphere than for the atmosphere of any other planet in our solar system. It can safely be concluded that Mars will be the first planet inviting manned exploration from an engineering as well as scientific point of view. (Author)

Descriptors :   (*MARS(PLANET), *ATMOSPHERE MODELS), (*MARS PROBES, ATMOSPHERE MODELS), PLANETARY ATMOSPHERES, ATMOSPHERE ENTRY, MATHEMATICAL MODELS, ASTROPHYSICS, ASTRONAUTICS

Subject Categories : Astrophysics
      Astronautics
      Spacecraft Trajectories and Reentry

Distribution Statement : APPROVED FOR PUBLIC RELEASE