PVO VENUS ONMS BROWSE SUPERTHERMAL
                                      OXYGEN 12 SECOND V1.0
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 …