Csaba Ferencz, János Lichtenberger, Orsolya E. Ferencz, Dániel Hamar, László Bodnár, Péter Steinbach, Valery Korepanov, Galina Mikhajlova, Yuri Mikhajlov, Vladimir D. Kuznetsov
Test of the SAS2 ULF-VLF electromagnetic wave analyzer in space environment – on board of the Compass-2 satellite
The SAS2 measuring system, an advanced version of the SAS electromagnetic wave analyzer and sampler, successfully operated on board of the Compass-2 satellite launched in 2006. The main mission of this satellite was to be a technical test of a satellite series in space environment. These satellites are intended to research space weather, further they will observe possible precursory events of earthquakes. The measuring systems and instruments worked well. We found some interesting phenomena in the observed ULF-VLF electromagnetic database detected by SAS-K2: whistler-doublets (observed earlier in 1989, by the first version of SAS on board of IK-24), “spiky” whistlers (SpW, we identified this signal type first from database of Demeter satellite, and we presented the theoretical solution of these signals). Further signals, propagated in ducted whistler mode between two inhomogeneous surfaces (onion-skin) in the plasma, were successfully identified first time during this mission. These signals presumably propagated in higher mode (third order) in the magnetosphere. We delivered the theoretical solution of this phenomenon for UWB (ultra wide band) signals too.