2.3.1 spase://NASA/NumericalData/ISIS1/CEP/PT60S ISIS 1 Electron N and T data 2020-07-07T21:14:41Z ISIS 1 ionospheric electron density and temperature data at 1-5 min resolution spase://SMWG/Person/Dieter.K.Bilitza GeneralContact spase://VSPO/NumericalData/P_ISIS1_HDR_NETE spase://VSPO/NumericalData/ISIS1/CEP/PT60S spase://SMWG/Repository/NASA/GSFC/SPDF Online Open FTPS from SPDF (not with most browsers) ftps://spdf.gsfc.nasa.gov/pub/data/isis/cylindrical_electrostatic_probes_ascii/isis1/ HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/isis/cylindrical_electrostatic_probes_ascii/isis1/ In CDF via HTTP from SPDF Text CALIBRATED spase://SMWG/Instrument/ISIS1/CEP ThermalPlasma 1969-01-30T00:00:00 1971-06-01T00:00:00 PT60S Earth.NearSurface.Ionosphere