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Preliminary Trajectory Chart


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

Time span: 1971-05-30 to 1973-11-30


This data set consists of two sets of charts of preliminary trajectories provided by JPL. One set of charts is for the spacecraft Pioneer E (69-075X launched August 27, 1969, but failed to attain orbit), Pioneer F (Pioneer 10, 72-012A), and Pioneer G (Pioneer 11, 73-019A). This set can be used to determine the position of the spacecraft with respect to the earth-sun line at various times into the missions. A user can also determine the estimated telemetry bit rate that was used as a function of position of the spacecraft with respect to the sun, and as a function of the various communication antennas available to receive the data. The reverse side of the chart contains similar information for Mariner 71 (Mariner 9, 71-051A), Mariner J (Mariner 10, 73-085A), Helios-A (74-097A), and Pioneer 9 (68-100A) superimposed on the Pioneer E, F, and G trajectories. The second set of charts is similar to the first but contains Mariner 9, Pioneer 10, Pioneer G, Mariner J, and Helios A on one side, and Pioneer 10 and Pioneer G on the other side. Both sets of charts can be used to determine the direct line-of-sight viewing period.

Alternate Names


    • Ancillary: Ephemeris/Orbit/Attitude


    • 71-051A-00D

    Additional Information


    Questions and comments about this data collection can be directed to: Coordinated Request and User Support Office



    NameRoleOriginal AffiliationE-mail
    Dr. Alfred J. SiegmethGeneral ContactNASA Jet Propulsion Laboratory
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