Instrument Information
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| IDENTIFIER |
urn:nasa:pds:context:instrument:pvmp.lp.lcps::1.2
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| NAME |
Cloud Particle Size Spectrometer for Pioneer Venus Large Probe
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| TYPE |
Spectrometer
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| DESCRIPTION |
The Large Probe Cloud Particle Size Spectrometer (LCPS) of Pioneer Venus was an instrument with the objective to measure Venus' cloud particle sizes and concentrations. The LCPS comprised of a laser, spectrometers, a sapphire window, a system of prisms and lenses, array detectors, and electronics. The 2 mW He-Ne ruggedized Coherent 80-2T laser was used to illuminate cloud particles. The spectrometers are an Optical Array Spectrometer (OAS) that covers 5 to 500 microns particle range, and a Scattering Subrange Spectrometer (SSR), which covers a particle size range from 0.5 to 5 microns. Optical lenses imaged the particle shadows on arrays of detectors. The particle shadows were used to determine particle size and concentration. For low-rate channels, output data were registered to an 8-bit counter, while for high-rate channels it was a log compressed counter. The flight sensor was similar to those flown in aircraft and balloons.
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| MODEL IDENTIFIER |
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| NAIF INSTRUMENT IDENTIFIER |
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| SERIAL NUMBER |
not applicable
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| REFERENCES |
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.
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