urn:nasa:pds:context:instrument:pvmp.lp.lcps 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.lp instrument_to_instrument_host 10.1109/TGRS.1980.350290 Knollenberg, R. G., and J. R. Gilland, Pioneer Venus sounder probe particle size spectrometer, IEEE Trans. Geosci. Rem. Sens., GE-18, No. 1, 100-104, doi:10.1109/TGRS.1980.350290, Jan. 1980. reference.KNOLLENBERGANDGILLAND_1980 PIONEER VENUS LARGE PROBE CLOUD PARTICLE SIZE SPECTROMETER Spectrometer not applicable not applicable INSTRUMENT OVERVIEW =================== The objective of this experiment was to measure Venus' cloud particle sizes and concentrations. A laser was used to illuminate cloud particles. Optical lenses imaged the particle shadows on arrays of detectors. The particle shadows were used to determine particle size and concentration. The flight sensor was similar to those flown in aircraft and balloons.