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/GEO-Reanalysis/OBrienLemon/PT1H NASA NumericalData O'Brien-Lemon Magnetospheric Density Reanalysis Data Set 2025-12-04T13:29:17Z 2020-07-07T21:14:34Z Only known prior ReleaseDate of the metadata 2025-12-04T13:29:17Z Added MetadataRightsList. Added ResourceType and NamingAuthority. Updated to 2.7.1. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. ZCB Retrospective analyses of spacecraft anomalies, especially surface charging, require information about the local plasma environment. Such information is usually not available at geosynchronous orbit because most vehicles lack appropriate sensors. We have constructed a nearly continuous hourly database covering four plasma moments at geosynchronous orbit: density and temperature for hot (energies > 100 eV) protons and electrons. The four moments are provided for 24 hourly fiducial local time bins and cover the years 1990-2005. We apply an ensemble of simple models to fill in the local time gaps between plasma measurements at geosynchronous orbit made by Los Alamos sensors. Validation on artificial data gaps shows that the reconstruction has rank order correlations ranging from 0.65 to 0.97, depending on bulk moment and local time. As a demonstration, we include a comparison of our reanalysis electron temperature to on-orbit surface charging measurements at a vehicle that lacks a plasma sensor. In addition to anomaly analyses, the reanalysis database we have produced can be used to provide geosynchronous boundary conditions for numerical simulations of the inner magnetosphere and temporal variations at a single location for statistical studies. spase://SMWG/Person/T.Paul.OBrien GeneralContact spase://SMWG/Person/Colby.L.Lemon GeneralContact ViRBO web page for this dataset http://virbo.org/OBrienLemon/reanalysis/ Top-level web page for data set Description of the dataset https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2006SW000279 Reanalysis of plasma measurements at geosynchronous orbit article Read Me page at ViRBO http://mag.gmu.edu/ftp/users/obrien/reanalysis/README Read Me text file spase://ViRBO/NumericalData/OBrienLemon/PT1H spase://VSPO/NumericalData/GEO-Reanalysis/OBrienLemon/PT1H spase://SMWG/Repository/ViRBO Online Open http://mag.gmu.edu/ftp/users/obrien/reanalysis/ Binary None EnergeticParticles 1989-09-14T00:00:00.00000 2005-09-24T23:00:00.00000 PT1H Earth.NearSurface denhp denhp Density of hot protons #/cm^3 Other denhe denhe Density of hot electrons #/cm^3 Other thp thp Temperature of hot protons eV Other the the Temperature of hot electrons eV Other