A study of magnetosphere-ionosphere coupling using Swarm ULF wave observations

Thursday, 18 December 2014: 5:45 PM
Georgios Balasis1, Ioannis A. Daglis2, Konstantinos Papadimitriou1,3, Ian Robert Mann4 and Roger Haagmans5, (1)National Observatory of Athens, Athens, Greece, (2)National and Kapodistrian University of Athens, Athens, Greece, (3)National and Kapodistrian University of Athens, Penteli, Athens, Greece, (4)University of Alberta, Edmonton, AB, Canada, (5)ESTEC, Noordwijk, Netherlands
Recently developed automated methods for deriving the characteristics of ultra low frequency (ULF) waves can be effectively applied to the Swarm datasets in order to retrieve, on an operational basis, new information about the near-Earth electromagnetic environment. Processing Swarm measurements with these methods will help to elucidate the processes influencing the generation and propagation of ULF waves, which in turn play a crucial role in magnetospheric dynamics. Moreover, a useful platform based on a combination of wavelet transforms and artificial neural networks has been developed to monitor the wave evolution from the Earth’s magnetosphere (using Cluster observations) through the topside ionosphere (with Swarm measurements) down to the surface (using ground-based magnetometer arrays recordings). Here we present the first ULF wave observations by Swarm, obtained by applying our analysis tools to the first twelve months of the mission’s Absolute Scalar Magnetometer (ASM) and Vector Field Magnetometer (VFM) data, and compare them with conjugate ground magnetometers’ measurements.