Some Studies From the ARGOS Mission

One of the purposes of our study is the investigation of the role of magnetic disturbances on neutral atmosphere that might allow us to improve the existing models of neutral atmosphere, which are very important for modeling of geomagnetic activity as well as satellite drag. While we await calibrated data from the ARGOS satellite mission, as part of the future work we studied long term (annual and semiannual) variations of geomagnetic activity. The specific purpose of this study has been to investigate the semiannual variation of geomagnetic activity at different latitudes as inferred from both geomagnetic activity indices and raw magnetic field data from geomagnetic observatories around the Earth. The strong dependence of semiannual variation of geomagnetic activity on latitude must lead to the corresponding variations of neutral atmosphere at different latitudes. We believe the ARGOS measurements might test this important result inferred from our study.