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Ultraviolet Photometry

NSSDCA ID: 1973-019A-06

Mission Name: Pioneer 11
Principal Investigator:Dr. Darrell L. Judge


This experiment consisted of a broadband photometer, sensitive between 200 and 800 A. During the cruise phase of the mission, this experiment was used to search for the supersonic-to-subsonic transition region in the solar wind. During the Jovian encounter, this experiment was used to look for evidence of an auroral oval on the Jovian dayside, to find the ratio of hydrogen to helium in the Jovian atmosphere, and to find the temperature of the outer portion of the Jovian atmosphere. Evidence of helium was found in the interplanetary region, indicating interactions between charged particles and neutral hydrogen.

Alternate Names

  • Pioneer11/UltravioletPhotometry
  • urn:nasa:pds:context:instrument:uv.p11

Funding Agency

  • NASA-Office of Space Science (United States)


  • Planetary Science: Atmospheres
  • Space Physics: Ionospheric Studies
  • Space Physics: Heliospheric Studies
  • Astronomy: Ultraviolet

Additional Information

Questions and comments about this experiment can be directed to: Dr. John F. Cooper



NameRoleOriginal AffiliationE-mail
Dr. Robert W. CarlsonOther InvestigatorNASA Jet Propulsion
Dr. Darrell L. JudgePrincipal InvestigatorUniversity of Southern
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