Instrument Information
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| IDENTIFIER |
urn:nasa:pds:context:instrument:pvmp.lp.ln::1.2
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| NAME |
Nephelometer for Pioneer Venus Large Probe
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| TYPE |
Nephelometer
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| DESCRIPTION |
The Large Probe Nephelometer (LN) of Pioneer Venus was an instrument that measured the energy backscattered from cloud particles, at around a wavelength of 900 nm. It used a solid-state pulsed gallium arsenide laser light emitting diode (LED) and detectors to illuminate the clouds. These detectors were made of three solid state photodiodes to allow the detection of the backscattering, ultraviolet background, and visible background. The altitude history of the backscattered signal indicated the presence and vertical extent of clouds along the trajectory. Comparisons with the measurements from the small probes indicated the spatial variability of the cloud structure. The experiment weighed about 0.5 kg and used about 1.3 W of power.
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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 |
Ragent, B., et al., Pioneer Venus sounder and small probes nephelometer instrument, IEEE Trans. Geosci. Rem. Sens., GE-18, No. 1, 111-116, doi:10.1109/TGRS.1980.350292, Jan. 1980.
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