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Pioneer Venus (PVO) neutral mass
spectrometer (ONMS) calibrated
superthermal oxygen high res data
for all Venus orbits (3-5055,
1978-12-05 to 1992-7-20).
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Citation |
Kasprzak, W., PVO-V-ONMS-3-SUPERTHRMLOXYGN-HIRES-V1.0,
PVO VENUS ONMS CALIBRATED SUPERTHERMAL OXYGEN HIGH RES. V1.0,
NASA Planetary Data System, 1993. |
Digital Object Identifier (DOI) |
10.17189/1519821
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Data Set Abstract |
This dataset 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.
The instrument has detected superthermal, energetic
or fast ions whose energy exceeds 36 eV in the spacecraft
frame of reference. These ions were observed in early orbits
during measurements of the neutral density near periapsis, have
an erratic and unpredictable signature, and occur at too high an
altitude to be due to the neutral atmosphere. When the altitude
of periapsis increased above the point where sensible neutral
density measurements could be made, the instrument was configured
specifically to detect superthermal ions. In general, for orbit
numbers 1 to 645, data were taken from the RPA mode. The gas
background signal with the filament on is about a factor of 10
less in this mode than in non-RPA mode, resulting in a lower
detection threshold. For orbit numbers above 923, the instrument
was deliberately configured with the filament off and non-RPA
mode data was used. For mass 16 the RPA voltage is about +3.8
volts. |
Search/Access Data |
Planetary Plasma Interactions Website
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Additional Information |
Mission Information |
PIONEER VENUS
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Data Set Information |
PVO-V-ONMS-3-SUPERTHRMLOXYGN-HIRES-V1.0 |
Instrument Host Information |
PVO
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Instrument Information |
ONMS
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Target Information |
VENUS
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