Physics – Space Physics
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991sphr.reptq....h&link_type=abstract
Semiannual Status Report, 1 Jan. - 30 Jun. 1991 Space Physics Research Inst., Sunnyvale, CA.
Physics
Space Physics
Atmospheric Models, Balloon Flight, Diurnal Variations, Equations Of Motion, International Cooperation, Mars Atmosphere, Planetary Atmospheres, Planetary Boundary Layer, Primitive Equations, Assimilation, Atmospheric Temperature, Earth Atmosphere, Mission Planning, Nonlinearity, Simulation, Velocity Distribution, Wind (Meteorology), Wind Velocity
Scientific paper
The utility of the Mars Planetary Boundary Layer Model (MPBL) for calculations in support of the Mars 94 balloon mission was substantially enhanced by the introduction of a balloon equation of motion into the model. Both vertical and horizontal excursions of the balloon are calculated along with its volume, temperature, and pressure. The simulations reproduce the expected 5-min vertical oscillations of a constant density balloon at altitude on Mars. The results of these calculations are presented for the nominal target location of the balloon. A nonlinear balanced model was developed for the Martian atmosphere. It was used to initialize a primitive equation model for the simulations of the Earth's atmosphere at the time of the El Chichon eruption in 1982. It is also used as an assimilation model to update the temperature and wind fields at frequent intervals.
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