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/DisplayData/TIMED/GUVI/Electron_Density_Profiles_PS NASA DisplayData TIMED GUVI Electron Density Profile PS Images 2025-12-04T13:28:07Z 2020-10-02T19:45:37Z Only known prior ReleaseDate of the metadata 2025-11-14T16:17:32Z Added PublicationInfo. Added ResourceType and NamingAuthority. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. Matched version number in schemaLocation attribute to updated value in Version tag. ZCB 2025-12-04T13:28:07Z Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB F region electron density as a function of altitude and latitude derived from the GUVI limb data. Summaries of estimated peak electron density and total electron content are also given. The profiles are derived from the 135.6 nm channel of the GUVI limb data. The 135.6 nm emission at night is due almost exclusively to recombination of O+ ions. Since O+ is the primary ion in the F region, the 135.6 nm volume emission rate is closely related to the square of the electron density. The file spans roughly 63 days in one-day plots The GUVI data used here are provided through support from the NASA MOamp;DA program. The GUVI instrument was designed and built by The Aerospace Corporation and The Johns Hopkins University. The Principal Investigator is Dr. Andrew B. Christensen and the Chief Scientist and co-PI is Dr. Larry J. Paxton. See also Data Usage Policy at http://guvitimed.jhuapl.edu/home_guvi-datausage. Christensen, Andrew B.; Paxton, Larry J. 2025-11-14T16:17:32Z Johns Hopkins University Applied Physics Laboratory; Space Physics Data Facility spase://SMWG/Person/Andrew.B.Christensen PrincipalInvestigator spase://SMWG/Person/Larry.J.Paxton CoInvestigator Electron Density Profiles Information http://guvitimed.jhuapl.edu/data_edp_info spase://VITMO/DisplayData/TIMED/GUVI/Electron_Density_Profiles_PS spase://VSPO/DisplayData/TIMED/GUVI/Electron_Density_Profiles_PS spase://SMWG/Repository/TIMED/GUVI_POC Online Open GUVI POC EDP Summary PostScript Data Request http://guvitimed.jhuapl.edu/data_fetch_edp_summary_ps This web page allows the request of PostScript-formatted image files for this product. To request data: select the year then click the link of the desired file name. GUVI Data Products Access http://guvitimed.jhuapl.edu/data_products This web page provides access to data products as well as to descriptions and availability information. Postscript None NASA, Andrew B. Christensen spase://SMWG/Repository/TIMED/GUVI_POC Online Open GUVI POC EDP Summary PostScript Data Request http://guvitimed.jhuapl.edu/data_fetch_edp_summary_pdf This web page allows the request of PDF-formatted image files for this product. To request data: select the year then click the link of the desired file name. GUVI Data Products Access http://guvitimed.jhuapl.edu/data_products This web page provides access to data products as well as to descriptions and availability information. PDF None NASA, Andrew B. Christensen 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 FTPS from SPDF (not with most browsers) ftps://spdf.gsfc.nasa.gov/pub/data/timed/guvi/levels_v10/level2b_e/edp/cdf/ FTP repository of TIMED GUVI L2B EDP data in CDF format at CDAWeb HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/timed/guvi/levels_v10/level2b_e/edp/cdf/ In CDF via HTTP from SPDF CDF Please acknowledge the support from the CDAWeb team at GSFC/SPDF. Calibrated Electron Density Profile Daily Summaries Level 3 spase://SMWG/Instrument/TIMED/GUVI EnergeticParticles 2002-02-22T00:00:00.000Z 2006-05-20T00:00:00.000Z P1D Earth.NearSurface.Ionosphere The L1C files currently available are being evaluated. Please contact GUVI team before using TIMED GUVI lower thermosphere ionosphere MLTI aurora