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/IMAGE/RPI/PT1M NASA NumericalData IMAGE RPI Monthly Electron Density Values https://doi.org/10.48322/awms-1e38 2026-07-21T12:05:20Z 2021-04-27T15:38:11Z Only known prior ReleaseDate of the metadata 2023-07-30T12:34:56.789Z Added DOI and PublicationInfo minted by LFB, metadata versioned up to SPASE 2.6.0, reviewed by LFB 20230727 2025-10-02T15:12:00Z Updated PublishedBy name to match ROR Registry. 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 2025-12-04T13:29:33Z Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB 2026-06-26T13:17:51Z Add 'Z' to RevisionEvent:ReleaseDate(s), PublicationDate. ZCB 2026-07-21T12:05:20Z Added HelioData InformationURL. JWL The electron density values listed in this file are derived from the IMAGE Radio Plasma Imager (B.W. Reinisch, PI) data using an automatic fitting program written by Phillip Webb with manual correction. The electron number densities were produced using an automated procedure (with manual correction when necessary) which attempted to self-consistently fit an enhancement in the IMAGE RPI Dynamic Spectra to either 1) the Upper Hybrid Resonance band, 2) the Z-mode or 3) the continuum edge. The automatic algorithm works by rules determined by comparison of the active and passive RPI data [Benson et al., GRL, vol. 31, L20803, doi:10.1029/2004GL020847, 2004]. The manual data points are not from frequencies chosen freely by a human. Rather the human specifies that the computer should search for a peak or continuum edge in a certain frequency region. Thus even the manual points are determined, in part, by the automatic algorithms. Of course that does not guarantee that the data points are right, but it does eliminate some human bias. Please acknowledge the instrument PI and NASA's Space Physics Data Facility. Reinisch, Bodo, W.; Galkin, Ivan, A. 2023-01-01T00:00:00Z Space Physics Data Facility spase://SMWG/Person/Bodo.W.Reinisch PrincipalInvestigator spase://SMWG/Person/Ivan.A.Galkin DataProducer TechnicalContact spase://SMWG/Person/Lee.Frost.Bargatze MetadataContact IMAGE RPI Instrument Page https://image.gsfc.nasa.gov/rpi/ IMAGE RPI Instrument page maintained by NASA GSFC with RPI facts, description, team, data, documents, discoveries, and related links sections en IMAGE RPI Instrument Page at UML https://ulcar.uml.edu/rpi.html IMAGE RPI Instrument page maintained by University of Massachusetts Lowell with RPI description, team, software downloads, software user guides, access to CORPRAL automated prospecting results, mission planning tools and commanding guide, data model descriptions for Level 0 and 1, sonification files of 2003 Halloween storm, and useful links en IMAGE RPI Anywhere Download Page https://ulcar.uml.edu/Installation/BinBrowser/install.htm RPIAnywhere software download page, including BinBrowser (RPI data analysis tool) and EdRPI (RPI mission planning tool) en HelioData https://helio.data.nasa.gov/dataset/IMAGE_RPI_PT1M The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more. spase://VSPO/NumericalData/P_IMAGE_HDR_RPI_ELECTRON_DENSITY_1M spase://VSPO/NumericalData/IMAGE/RPI/PT1M spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb 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/image/rpi/rpi_electron_density/ FTP access to IM_ELECTRON_DENSITY_RPI file HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/image/rpi/rpi_electron_density/ In CDF via HTTP from CDAWeb CDF spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb 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 CDAWeb https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=IM_ELECTRON_DENSITY_RPI&index=sp_phys IM_ELECTRON_DENSITY_RPI Plots, lists and files from CDAWeb Text https://cdaweb.gsfc.nasa.gov/pub/data/image/rpi/rpi_Ne_fp_along_orbit/rpi_electron_density_CDF/$Y im_electron_density_rpi_$Y$m$d_$v.cdf spase://SMWG/Repository/NASA/GSFC/SPDF Online Open CDAWeb Programmatic Data Access https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/IM_ELECTRON_DENSITY_RPI/clientLibraryExample/ IM_ELECTRON_DENSITY_RPI Access to this data from common programming environments. Note: this AccessInformation element was added by HDPWS. Binary spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb 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 CDAWeb HAPI Server https://cdaweb.gsfc.nasa.gov/hapi IM_ELECTRON_DENSITY_RPI Web Service to this product using the HAPI interface. CSV spase://SMWG/Instrument/IMAGE/RPI Waves.Active 2001-01-01T00:00:00.000Z 2005-12-01T00:00:00.000Z PT1M Heliosphere.Inner Earth.Magnetosphere Earth.NearSurface.Plasmasphere Earth.NearSurface.AuroralRegion Earth.NearSurface.PolarCap