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/AE-E/BIMS_OSS/PT256S NASA NumericalData AE-E MSIS Neutral Density Data 2025-12-04T13:28:26Z 2020-07-07T21:14:16Z Only known prior ReleaseDate of the metadata 2025-12-04T13:28:26Z Added MetadataRightsList and RightsList(s). Added ResourceType and NamingAuthority. Updated to 2.7.1. ZCB This set of neutral density data was deduced from the mass spectrometer measurements on the Atmosphere Explorer E's Bennett Ion-Mass Spectrometer and Open-Source Neutral Mass Spectrometer. The density numbers (in cm-3) for hydrogen, nitrogen and molecular oxygen were provided by A. Hedin (GSFC, Code 914, now retired). They are related to A. Hedin's atmospheric modelling work (Mass Spectrometer and Incoherent Scatter atmospheric model - MSIS). In addition to density, the record includes also orbital parameters. spase://SMWG/Person/Dieter.K.Bilitza GeneralContact spase://VSPO/NumericalData/P_AE-E_HDR_MSIS spase://VSPO/NumericalData/AE-E/BIMS_OSS/PT256S 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/ae_e.html FTPS from SPDF (not with most browsers) ftps://spdf.gsfc.nasa.gov/pub/data/ae/ae_msis_data/ HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/ae/ae_msis_data/ In CDF via HTTP from SPDF Text CALIBRATED spase://SMWG/Instrument/AE-E/BIMS spase://SMWG/Instrument/AE-E/OSS Radiance ThermalPlasma NeutralGas 1977-07-01T00:00:00 1981-06-09T23:59:59 PT256S Earth.NearSurface.Ionosphere Earth.NearSurface.Atmosphere