Abstract
This study presents comparisons between the Pioneer Venus Orbiter (PVO) magnetometer (OMAG) observations and the HYB-Venus hybrid simulation code. The comparisons are made near periapsides of four PVO orbits using the full resolution PVO/OMAG data. Also, the statistics of the solar wind and interplanetary magnetic field (IMF) conditions at Venus are studied using the PVO interplanetary dataset. The statistics include the histograms and the probability density maps of the selected upstream parameters. The confidence intervals derived from the upstream statistics demonstrate the nominal simulation input parameter space. Moreover, the probability density maps give the dependencies between the upstream parameters. The comparisons between the simulation code and the data along the spacecraft trajectory show that the basic, large scale, trends seen in the magnetic field can be understood by the current simulation runs. The discrepancies between the simulation and the data were found to arise at low altitudes close to the planetary ionosphere in the region which cannot be resolved in detail by the grid size of the runs.
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