1. University of Warmia and Mazury in Olsztyn,Space Radio-Diagnostics Research Centre,Poland
2. Universitat Politècnica de Catalunya,UPC-IonSAT,Department of Applied Mathematics IV,Barcelona,Spain
3. Aerospace Information Research Institute (AIR), Chinese Academy of Sciences (CAS), No 9 Dengzhuang South Road,Beijing,China,100094
4. University of Massachusetts,Space Science Laboratory,USA