Study of the Solar Wind Interaction with Mars

The purpose of this study is to perform the following activities: (1) Implement the HALFSHEL code on the parallel machines at NASA Ames' NAS facility; (2) Perform test simulations of "bare" Mars object and compare results with data and previous simulations that only reached to the Martian terminator; (3) Place ion production chemistry into the parallel HALFSHEL code and test; (4) Simulate Mars at least 3 Rm into the tail region and compare the results to data; and (5) Examine the changes in the Martian magnetosphere by examining time dependent variation of the solar wind parameters. This paper details the progress made during the first four months of the contract in accordance with the contract requirements.