2.7.1 https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions spase://NASA/NumericalData/ISIS2/CEP/PT6S NASA NumericalData ISIS 2 Electron N and T data https://doi.org/10.48322/v7sc-c037 2026-06-26T13:18:18Z 2020-07-07T21:14:42Z Only known prior ReleaseDate of the metadata 2025-12-04T13:29:41Z Added MetadataRightsList and RightsList(s). Added ResourceType and NamingAuthority. Updated to 2.7.1. ZCB 2026-04-10T09:58:46Z Added new Contact(s). ZCB 2026-04-10T10:03:44Z Added PublicationInfo. ZCB 2026-04-30T16:34:06Z Added DOI. tlk 2026-06-26T13:18:18Z Add 'Z' to TemporalDescription:TimeSpan:StartDate, TemporalDescription:TimeSpan:StopDate. ZCB ISIS 2 ionospheric electron density and temperature data at 6 sec resolution Paghis, Irvine 2026-04-10T10:03:44Z Space Physics Data Facility spase://SMWG/Person/Irvine.Paghis PrincipalInvestigator spase://SMWG/Person/Dieter.K.Bilitza GeneralContact spase://VSPO/NumericalData/P_ISIS2_HDR_NETE spase://VSPO/NumericalData/ISIS2/CEP/PT6S spase://SMWG/Repository/NASA/GSFC/SPDF Online Open https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products FTPBrowser https://omniweb.gsfc.nasa.gov/ftpbrowser/isis_2.html FTPS from SPDF (not with most browsers) ftps://spdf.gsfc.nasa.gov/pub/data/isis/cylindrical_electrostatic_probes_ascii/isis2/ HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/isis/cylindrical_electrostatic_probes_ascii/isis2/ In CDF via HTTP from SPDF Text CALIBRATED spase://SMWG/Instrument/ISIS2/CEP ThermalPlasma 1971-04-14T00:00:00Z 1973-03-31T00:00:00Z PT6S Earth.NearSurface.Ionosphere