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Photopolarimeter System (PPS)

NSSDCA ID: 1977-084A-11

Mission Name: Voyager 1
Principal Investigator:Dr. Arthur Lonne Lane


This experiment consisted of an 8-in. (20 cm) f/1.1 telescope that could send its observations through a polarizer and a filter for one of eight bands in the 2200- to 7300-A spectral region, then on to a photomultipler tube. By study of these emission intensity data, information on surface texture and composition of both planets (Jupiter and Saturn) could be obtained, along with information on size distribution and composition of the rings of Saturn and information on atmospheric scattering properties and density for both planets. Molecular scale heights for both planets could also be determined from these data.

Alternate Names

  • PPS
  • Photopolarimeter
  • Voyager1/PPS

Facts in Brief

Mass: 2.55 kg
Power (avg): 0.7 W
Bit rate (avg): 0.04 kbps

Funding Agency

  • NASA-Office of Space Science (United States)


  • Planetary Science: Atmospheres

Additional Information

Questions and comments about this experiment can be directed to: Dr. Edwin V. Bell, II



NameRoleOriginal AffiliationE-mail
Dr. David L. CoffeenCo-InvestigatorNASA Goddard Institute for Space Studies
Dr. Charles W. HordCo-InvestigatorUniversity of Colorado
Dr. Kevin D. PangCo-InvestigatorNASA Jet Propulsion Laboratory
Dr. James E. HansenCo-InvestigatorNASA Goddard Institute for Space
Dr. R. A. WestCo-InvestigatorUniversity of Colorado
Dr. Larry W. EspositoCo-InvestigatorUniversity of
Dr. Makiko SatoCo-InvestigatorNASA Goddard Institute for Space
Dr. Arthur Lonne LanePrincipal InvestigatorNASA Jet Propulsion

Selected References

  • Lillie, C. F., et al., The Voyager mission photopolarimeter experiment, Space Sci. Rev., 21, No. 2, 159-181, doi:10.1007/BF00200849, Nov. 1977.
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