Pioneer Venus (PVO) Electron Temperature Probe (OETP) Data Bundle Readme
Introduction
============
This document contains information pertaining to the PVO Electron Temperature Probe Data Bundle
This bundle includes PVO Electron Temperature Probe (OETP) High-Res., PVO Electron Temperature
Probe (OETP) Low-Res., PVO Electron Temperature Probe (OETP) Ionopause, PVO Electron
Temperature Probe (OETP) Bow Shock, PVO Electron Temperature Probe (OETP) Solar EUV, and PVO
OETP Venus Orbit Browse Plot data collections.
This bundle is organized into 7 collections, including: PVO Electron Temperature Probe (OETP)
High-Res. Data Collection (urn:nasa:pds:pvo-oetp:data-electron-highres), PVO Electron
Temperature Probe (OETP) Low-Res. Data Collection (urn:nasa:pds:pvo-oetp:data-electron-lowres),
PVO Electron Temperature Probe (OETP) Ionopause Data Collection (urn:nasa:pds:pvo-oetp:data-
ionopause), PVO Electron Temperature Probe (OETP) Bow Shock Data Collection (urn:nasa:pds:
pvo-oetp:data-bowshock), PVO Electron Temperature Probe (OETP) Solar EUV (urn:nasa:pds:
pvo-oetp:data-solareuv), PVO OETP Venus Orbit Browse Plot Data Collection (urn:nasa:pds:
pvo-oetp:browse), and PVO Electron Temperature Probe (OETP) Document Collection (urn:nasa:pds:
pvo-oetp:document). PDS4 documentation is all XML. There is an XML label for every product in
the archive.
PVO Electron Temperature Probe (OETP) High-Res. Data Collection
===============================================================================================
This collection includes the High Resolution Ne File. These data are based on measurements of
the electron saturation current or the ion saturation current taken from as many voltampere
curves as the telemetry data rate permitted. Since Ne is assumed equal to Ni everywhere in the
ionosphere, either can be used as a measure of Ne. The ion current is used at high densities
(Ni ❯ 4x104cm-3) and the electron current is used at lower densities. Typically, 4 to 8 high
resolution density samples are obtained in the interval between recovered voltampere curves,
although this ratio is bit rate dependent. This provides Ne and Ni measurements at much smaller
intervals than is possible from the voltampere curves themselves. High resolution measurements
are typically available at 2 to 8 second intervals depending upon the telemetry rate available
to the OETP at the time.
PVO Electron Temperature Probe (OETP) Low-Res. Data Collection
===============================================================================================
This 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).
PVO Electron Temperature Probe (OETP) Ionopause Data Collection
===============================================================================================
This volume includes 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).
PVO Electron Temperature Probe (OETP) Bow Shock Data Collection
===============================================================================================
This volume includes orbit-by-orbit times and locations of the bow shock crossings, which are
characterized by distinct changes in Ne. Multiple shock crossing are listed if they are
sufficiently separated to be resolved accurately.
PVO Electron Temperature Probe (OETP) Solar EUV Data Collection
===============================================================================================
This volume includes the magnitude of the photoemission current from the radial probe, Ipe, (in
units of 10-9 amps).
PVO OETP Venus Orbit Browse Plot Data Collection
===============================================================================================
This collection contains plots of the electron number density for individual PVO orbits
measured by the OETP instrument. The plots are organized into 100 orbit PDF files.
This is a PDS4 archive of the following PDS3 data sets:
PVO-V-OETP-3-HIRESELECTRONS-V1.0 (https://doi.org/10.17189/1519809)
PVO-V-OETP-5-LORESELECTRONS-V1.0 (https://doi.org/10.17189/1519812)
PVO-V-OETP-5-IONOPAUSELOCATION-V1.0 (https://doi.org/10.17189/1519811)
PVO-V-OETP-5-BOWSHOCKLOCATION-V1.0 (https://doi.org/10.17189/1519810)
PVO-V-OETP-5-SOLAREUV-24HRAVG-V1.0 (https://doi.org/10.17189/1519813)
These data collections were originally archived under PDS3 in the following volumes:
PVO-V-OETP-3-HIRESELECTRONS-V1.0 in PV07_0001 and PV07_0002
PVO-V-OETP-5-LORESELECTRONS-V1.0 in PV07_0001
PVO-V-OETP-5-IONOPAUSELOCATION-V1.0 in PV07_0001 and PV07_0002
PVO-V-OETP-5-BOWSHOCKLOCATION-V1.0 in PV07_0001 and PV07_0002
PVO-V-OETP-5-SOLAREUV-24HRAVG-V1.0 in PV07_0001
Under the PDS3 standard all archives were self contained and could in principle be stored in a
single file system (disk, CD-ROM, etc.). PDS4 takes advantage of the network capabilities that
allow archives to be distributed. As a result, some of the documents and metadata previously
stored in the PDS3 catalog files are no longer maintained locally, but are maintained in a
central repository. Those files are referenced by unique PDS logical identifiers that are
included in the document collection inventory.
Errata
======
There is no known errata. An errata file was included if more issues are discovered.
Every effort has been made to insure that the data are of the best quality available. However,
users are encouraged to verify the correctness of the data prior to submitting any publications
or other work based on these data and report any issues to PDS/PPI.
Contacts
========
For questions or problems regarding this bundle, please contact the PDS Planetary Plasma
Interactions Node:
Email pds_operator@igpp.ucla.edu
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