2.2.6 spase://CDPP/NumericalData/AMDA/Indices/Ground_Based/ground-based-aei Auroral_Electrojet 2015-10-12T10:48:29Z PrincipalInvestigator spase://SMWG/Repository/CDPP/AMDA Online Open AMDA at CDPP http://amda.cdpp.eu Text spase://CDPP/Instrument/AMDA/Indices/Ground_Based MagneticField 1975-01-01T00:00:00Z 2012-05-31T23:59:00Z PT60S Earth AE/AL/AU ae nT