2.2.0 spase://NASA/NumericalData/ISIS2/IMS/Plasma_Data ISIS 2/IMS/Plasma Data 2020-07-07T21:14:42Z This set of plasma data came from the ISIS 2 (International Satellites for Ionospheric Studies) ion-mass spectrometer experiment. Ion densities of various ion species are available for the lower range (1-8 atomic mass units, H+, D+, He+, N++, O++) and the upper range (8-64 atomic mass units, O++, N+, O+, 18+, N2+, NO+, O2+). Also included in the data set are spacecraft position data, geomagnetic field intensity, F107 flux (daily solar radio flux), Kp indices, and Dst indices. spase://SMWG/Person/John.H.Hoffman PrincipalInvestigator spase://VSPO/NumericalData/ISIS2/IMS/Plasma_Data spase://SMWG/Repository/NASA/GSFC/SPDF Online Open FTPS from SPDF (not with most browsers) ftps://spdf.gsfc.nasa.gov/pub/data/isis/ion-mass_spectrometer_ascii_binary/ HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/isis/ion-mass_spectrometer_ascii_binary/ Text spase://SMWG/Instrument/ISIS2/IMS IonComposition 1971-04-21T00:12:41 1972-12-31T23:20:43 Earth.NearSurface.Ionosphere