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Final Report of Data Analysis


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


This data set is the final report containing the data analysis of the Asteroid/Meteoroid Astronomy experiments carried in Pioneers 10 and 11. It discusses methods of reductions, descriptions of the instruments (telescopes), calibrations, assumptions, and results. Graphs and tables of counts of penetration, both total and in sectors of heliocentric distance are given. Plots of number vs particle size distributions are given. Appendix tables give the data measured by the Asteroid/Meteoroid Detector (AMD). Table C.1 gives event number, day of year, sector, bandwidth, entrance time (bits) and exit time (bits) for each of the four telescopes on Pioneer 10. Table C.2 gives backgrounds and peak signals for events measured by the AMD on Pioneer 10. Columns include event number, day of year, sector, bandwidth, background (bits) and peak signals (bits) for each of the four telescopes on Pioneer 10. Tables C.3 and C.4 give the same quantities for the Pioneer 11 telescopes as are in C.1 and C.2 respectively for Pioneer 10. Appendix E contains tables of particle concentrations in pre-asteroid belt region, and asteroid belt region sectors for Pioneers 10 and 11 in separate tables. Other appendices include trial computer simulation of analysis procedure, and calculation and tabulation of gegenschein brightness. A table (H-1) gives the gegenschein brightness as a function of heliocentric distance in astronomical units (AU). Copies of several articles of analysis and results of these experiments are appended. This document (TRF B33320), which is the sole source of reduced data from these experiments available from NSSDC, is in fiche form.

Alternate Names

  • Data Analysis, Final Report


  • Planetary Science: Small Bodies
  • Astronomy: Visible


  • 72-012A-03B
  • 73-019A-03B

Additional Information



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



NameRoleOriginal AffiliationE-mail
Dr. Sherman L. NesteGeneral ContactGeneral Electric Company
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