urn:nasa:pds:context:instrument:pvmp.bus.bims 1.0 1.20.0.0 Product_Context 2023-12-11 1.0 Initial creation of the Multiprobe context products urn:nasa:pds:context:instrument_host:spacecraft.pvmp.bus instrument_to_instrument_host 10.1109/TGRS.1980.350259 Taylor, H. A., Jr., et al., Bennett ion mass spectrometers on the Pioneer Venus bus and Orbiter, IEEE Trans. Geosci. Rem. Sens., GE-18, 44-49, doi:10.1109/TGRS.1980.350259, Jan. 1980. reference.TAYLORETAL_1980 PIONEER VENUS PROBE BUS ION MASS SPECTROMETER Spectrometer not applicable not applicable INSTRUMENT OVERVIEW =================== This ion mass spectrometer experiment obtained measurements which provided information on the solar wind interaction with Venus, upper atmosphere photochemistry, and the mass and heat transport characteristics of the atmosphere. A Bennett ion spectrometer, similar to units flown on many earth satellites and rockets, measured Venus' upper atmosphere ion concentrations in the mass range from 1 to 60 atomic mass units (u) from the time of crossing Venus' bowshock to bus burnup.