NASA Logo, National Aeronautics and Space Administration
NASA Space Science Data Coordinated Archive Header

Pioneer 11 Ultraviolet Photometer Cruise Data Set


Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)

Time span: 1973-04-06 to 1993-12-31


This collection contains daily averages of the interplanetary cruise archive data from the Pioneer 11 UV photometer from spacecraft launch onward. These data are used to study the interaction of the solar wind with the interstellar medium by measurements of spatial and temporal variations of the intensity of backscattered solar Lyman alpha emission at 1216 A and of the solar Helium line at 584 A. Daily averages of counting rates from the short (< 800 A) and long (<1400 A) wavelength channels are included along with ephemeris data in ASCII data files corresponding to one year of data per file. The long and short wavelength channels are dominated by the 1216 A and 584 A emissions, respectively, in interplanetary space. The conversion factors between counts/sec and Rayleighs for the two channels, as determined by a pre-launch calibration with a radioisotope thermogenerator, are: Rayleighs = (counts/sec - 3.)/4.9 for 1216 A, and Rayleighs = (counts/sec - 3.)/7.3 for 584 A. ASCII text files in Standard Formatted data Unit (SFDU) metadata format describe the spacecraft mission, the UV photometer experiment, and the parameters and format of this data set.

This collection is available on-line at:

Alternate Names

  • UV Cruise Archive, Daily Avg.


  • Space Physics: Heliospheric Studies


  • 73-019A-06C

Additional Information



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



NameRoleOriginal AffiliationE-mail
Dr. Darrell L. JudgeData ProviderUniversity of Southern
Dr. Pradip GangopadhyayGeneral ContactUniversity of Southern

Selected References

  • Shemansky, D. E., and D. L. Judge, Evidence for change in particle excitation of Jupiter's atmosphere 1968-1979, J. Geophys. Res., 93, No. A1, 21-28, doi:10.1029/JA093iA01p00021, Jan. 1988.
[] NASA Logo -