Multi-Satellite, Multi-Instrument and Ground-Based Observations Analysis and Study of ULF Wave Phenomena and Products
Balasis, Georgios1; Daglis, Ioannis A.1; Georgiou, Marina1; Papadimitriou, Constantinos1; Haagmans, Roger2
1National Observatory of Athens, GREECE; 2European Space Agency, NETHERLANDS
We examine data from two magnetospheric and a topside ionosphere missions (Cluster, Geotail and CHAMP) as well as ground-based magnetometer networks (CARISMA and IMAGE) for signatures of ULF waves during the 2003 Halloween geospace magnetic superstorm. We use a suite of wavelet-based algorithms, which are a subset of a tool that is being developed within the context of "Multi-satellite, multi-instrument and ground-based observations analysis and study of ULF wave phenomena and products" (ULFwave), an ESA funded study. We look at three specific intervals during different phases of the storm when at least two of the satellites are in good local time (LT) conjunction and examine separately Pc3 and Pc4-5 ULF wave activity and its concurrence in the different regions of the magnetosphere and down to the topside ionosphere and on the ground. We provide evidence for the occurrence of a number of prominent ULF wave events during the storm and offer a platform to study the wave evolution from high magnetic latitudes to low Earth orbit (LEO) and ground. The solid results confirm the applicability and the potential of our wavelet-based algorithms for the analysis of multi-instrument multi-satellite observations and the detection, identification and classification of ULF waves. In the past decade, a critical mass of high-quality scientific data on the electric and magnetic fields in the Earth’s magnetosphere has been progressively collected. This data pool will be further enriched by the measurements of the upcoming ESA/Swarm mission, a constellation of three satellites in three different polar orbits between 400 and 550 km altitude, which will be launched in 2013. New analysis tools that can cope with measurements of various spacecraft at various regions of the magnetosphere, like the ones used in the present study, will effectively enhance the scientific exploitation of the accumulated data. The ULFwave study is funded by ESA under contract ESTEC 4000103770/11/NL/JA/ef.