TY - JOUR A1 - Papadimitriou, C. A1 - Balasis, G. A1 - Daglis, I. A. A1 - Giannakis, O. T1 - An initial ULF wave index derived from 2 years of Swarm observations JO - Ann. Geophys. J1 - ANGEO VL - 36 IS - 2 SP - 287 EP - 299 Y1 - 2018/03/05 PB - Copernicus Publications SN - 1432-0576 UR - https://angeo.copernicus.org/articles/36/287/2018/ L1 - https://angeo.copernicus.org/articles/36/287/2018/angeo-36-287-2018.pdf DO - 10.5194/angeo-36-287-2018 ER -