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Data Sets and Information
• bundle: Venus Solar Wind Interactions Data
  This bundle contains the data presented in Brecht, S. H. and S. A. Ledvina, An explanation of the nightside ionospheric structure of Venus, JGR, 2020.
• bundle: PVO Spacecraft VSO Ephemeris and Spacecraft Orientation Data Bundle
  This bundle contains PVO Spacecraft VSO Ephemeris and Spacecraft Orientation data. This bundle includes Pioneer Venus Orbiter (PVO) spacecraft position and orientation data in Venus Solar Orbital (VSO) coordinates This data was previously released as PDS3 data in PVO-V-POS-5--VSOCOORDS-12SEC-V1.0 (https://doi.org/10.17189/1519830).
• collection: Pioneer Venus Orbiter (PVO) Electron Temperature Probe (OETP) Ionopause Data Collection
  This data collection contains orbit-by-orbit times and locations of the ionopause crossings, which are evident as sharp gradients in Ne at the top of the ionosphere. (These crossings always occur within 30 minutes of periapsis, so they may be seen in the High Resolution Ne files)
• collection: Pioneer Venus Orbiter (PVO) Electron Temperature Probe (OETP) Browse Plot Collection
  This collection contains PDF/A files that contains plots of PVO electron number density data from Venus Orbital Operations.
• collection: Pioneer Venus Orbiter (PVO) Electron Temperature Probe (OETP) Solar EUV Data Collection
  This data collection contains a file that gives the magnitude of the photoemission current from the radial probe, Ipe, (in units of 10-9 amps) for orbits 0001 to 4800.
• collection: PVO ONMS Neutral Density 12 Sec Data Collection
  This data collection contains a file with PVO Neutral Mass Spectrometer (ONMS) derived neutral density 12 sec data for all Venus orbits(3 1978-12-07T14:30:47.000Z; 640 1980-09-05T17:14:34.016Z; 4961 1992-07-06T00:26:53.847Z; 5055 1992-10-07T19:49:39.752Z).
• collection: PVO ONMS Document Collection
  This collection contains the document files associated with the Pioneer Venus Orbiter (PVO) Neutral Mass Spectrometer (ONMS) Data Bundle.
• collection: PVO ONMS Superthermal Oxygen High-Res. Data Collection
  This data collection contains PVO Neutral Mass Spectrometer (ONMS) derived superthermal oxygen high res data. The data has one point for each point measured, that went into a successful data fitting for that time interval. The individual flux and density values are computed by dividing each data value by the value of the fitting function at the corresponding time.
• collection: Pioneer Venus Orbiter (PVO) Ion Mass Spectrometer Document Collection
  This collection contains the document files associated with the Pioneer Venus (PVO) Ion Mass Spectrometer Data Bundle.
• collection: PVO ONMS Superthermal Oxygen 12 Second Data Collection
  This data collection contains a file with PVO neutral mass spectrometer (ONMS) derived superthermal oxygen 12 second data for all Venus orbits (1 1978-12-07T15:07:22.817; 4368 1990-11-21T02:01:19.648; 4494 1991-03-27T01:25:54.275; 4975 1992-07-20T00:22:15.544).
• collection: PVO ONMS Thermal Ion 12 Second Data Collection
  This data collection contains a data file with PVO Neutral Mass Spectrometer (ONMS) derived Thermal Ion 12 second data from 1980-03-15T10:26:29.656 to 1992-09-25T23:09:39.859.
• collection: Venus Solar Wind Interactions Data
  This collection contains the data presented in Brecht, S. H. and S. A. Ledvina, An explanation of the nightside ionospheric structure of Venus, JGR, 2020. The data is stored in ASCII (text) format for easy reading. Units for the results are in the cgs system, densities (cm^-3), magnetic field (Gauss) and lengths (cm). The magnetic field can be found in the B-GradPe.dat.gz. The O+ density is designated by 2s in the file name. The O2+ density is designated by 3s in the file name. There are 2 types of data files, *.dat.gz and *.sdat.gz. The *.dat files contain the data stored on the Cartesian grid, while the *.sdat contains the data stored on the spherical mesh.
• collection: PVO ONMS Ion Max Count Rate Data Collection
  This data collection contains a file with PVO Neutral Mass Spectrometer (ONMS) derived ion max count rate data for all Venus orbits(1 1978-12-05T15:06:31.820; 5055 1992-10-07T19:50:28.680).
• collection: Pioneer Venus Orbiter (PVO) Ion Mass Spectrometer Low-Res Data Collection
  This collection contains Pioneer Venus Orbiter low-resolution ion number densities data recorded by the Ion Mass Spectrometer (OIMS), from PVO Venus.
• collection: PVO Spacecraft VSO Ephemeris and Spacecraft Orientation ASCII Data Collection
  This collection includes Pioneer Venus Orbiter (PVO) ephemeris, spacecraft position and orientation data in Venus Solar Orbital (VSO) coordinates. This collection is sampled every 12 seconds near periapsis, and at 1 minute or 10 minute rates in the solar wind, the lowest rates near apoapsis. Planetocentric and heliocentric position vectors and solar zenith angle (Sun-Venus-PVO) are also provided. The VSO parameters are derived from the PVO Supplemental Experimenter Data Records (SEDR), other parameters are taken directly from the SEDR dataset. The original data were all binary and contained a non-standard time representation. No software was provided to convert these data to ASCII. PDS created ASCII versions of these files in response to user concerns regarding the ease of use of these data.
• collection: Pioneer Venus Orbiter (PVO) Electron Temperature Probe (OETP) Low-Res. Data Collection
  This data collection includes the Ne, Te and Vs measurements derived by fitting the radial probe voltampere curves taken whenever PVO was within the ionosphere (ie., between the inbound and outbound ionopause crossings). Data from essentially every orbit in 1979 and 1980 included ionosphere transits.
• collection: PVO ONMS Neutral Density High-Res. Data Collection
  This collection contains PVO Neutral Mass Spectrometer (ONMS) derived neutral density high resolution data for all Venus orbits (3 1978-12-07T14:29:47.668Z; 640 1980-09-05T17:15:20.875Z; 4961 1992-07-06T00:23:50.044Z; 5055 1992-10-07T19:50:36.144Z).
• collection: Venus Solar Wind Interactions Document Collection
  This document collection contains a User Guide file that describes the data in the Venus Solar Wind Interactions Data bundle, which contains the data presented in Brecht, S. H. and S. A. Ledvina, An explanation of the nightside ionospheric structure of Venus, JGR, 2020.
• collection: PVO Spacecraft VSO Ephemeris and Spacecraft Orientation Document Collection
  This collection contains the document files associated with the PVO Spacecraft VSO Ephemeris and Spacecraft Orientation Data Bundle.
• collection: Pioneer Venus Orbiter Radio Occultation Profiles Document Collection
  Documentation for derived data products from Pioneer Venus Orbiter radio occultations at Venus. Derived data products include: (A) frequency data from the NSSDC, (B) Venus ionospheric electron density profiles from the NSSDC, (C) Venus neutral atmospheric profiles from the NSSDC, (D) Venus ionospheric electron density profiles from graphical sources, and (E) Venus neutral atmospheric profiles from graphical sources.

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