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Backscatter Nephelometer

NSSDCA ID: 1984-128F-02

Mission Name: Vega 2 Balloon
Principal Investigators:Prof. Jacques E. Blamont
Principal Investigators:Dr. Viacheslav Linkin


The Vega Balloon Backscatter Nephelometer was a 2.0 x 5.5 x 6.5 cm box mounted on the lower section (the battery compartment) of the gondola. It was designed to measure the cloud density in the Venus atmosphere.

The nephelometer consisted of a pulsed gallium arsenide light source emitting at 930 nm, a PIN diode with a filter-detector to reject sunlight, transmission and reception path optics, and a thermistor to monitor internal temperatures. The box had two apertures, one for light source transmission and one for reception. The nephelometer measured a region from about 4-100 cm from the aperture. The absolute accuracy of the nephelometer was 10E-5/m sr and the resolution was 2.0 x 10E-6/m sr.

Alternate Names

  • Vega2Balloon/BackscatterNephelometer

Funding Agency

  • Unknown (U.S.S.R)


  • Planetary Science: Atmospheres

Additional Information

Questions and comments about this experiment can be directed to: Dr. David R. Williams



NameRoleOriginal AffiliationE-mail
Prof. Jacques E. BlamontTeam LeaderCentre National d'Etudes Spatiales
Dr. Viacheslav LinkinTeam LeaderRussian Academy of
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