2.3.1 spase://CNES/NumericalData/CDPP-AMDA/Indices/Ground_Based/ground-based-aei auroral electrojet 2018-06-21T10:48:29Z AE/AL/AU/AO indices are taken from the WDC (World Data Center) at Kyoto via ISGI/UNISTRA * FINAL : 1975 (AE and AL only) ; 1978 - Jun., 1988 * PROVISIONAL: Mar., 1989 ; Jan. 1990 - onwards WDC Kyoto and ISGI website at EOST; License: CC BY-NC https://creativecommons.org/licenses/by-nc/4.0/ PrincipalInvestigator spase://CNES/Person/WDC TechnicalContact spase://CNES/Person/Aude.Chambodut TechnicalContact WDC for Geomagnetism - Kyoto, Japan http://wdc.kugi.kyoto-u.ac.jp/ IAGA geomagnetic indices http://isgi.unistra.fr/indices_aa.php spase://SMWG/Repository/CNES/CDPP-AMDA Online Open AMDA at CDPP http://amda.cdpp.eu Text WDC Kyoto via ISGI/UNISTRA spase://CNES/Instrument/CDPP-AMDA/Indices/Ground_Based MagneticField 1975-01-01T00:00:00Z 2018-02-28T23:59:00Z PT1M Earth.NearSurface.AuroralRegion AE ae Auroral Electrojet (AE = AU - AL) nT AU au Auroral Electrojet Upper envelope nT AL al Auroral Electrojet Lower envelope nT AO ao Auroral Electrojet (AO = (AU + AL) / 2) nT