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Doppler Tracking Data Saturn Encounter Data


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

Time span: 1979-08-01 to 1979-09-18


These experimenter-supplied, Doppler tracking, Saturn encounter data are on binary magnetic tape created on a UNIVAC 1108 computer. The variable length records are divided into nine different groups. Each group contains a 5-word descriptive header followed by a variable number of data records. The file identification group contains one record identifying the spacecraft, system and program used to create the data, and the date the data were created. The fingerprints group gives more information on the program used to create the data. The user label group is optional and contains BCD label information. The orbit data identifier group contains one record identifying the various fields and their positions within the orbit data record. The orbit data group contains the time of observation in seconds from January 1, 1950; compression time; radio band indicator; tracking network indicator; transmitting and receiving station number; data type; reference frequency; and pass and spacecraft identification. The ramp data identifier group contains the conversion factors used for the ramp data (data transmitted at a precisely controlled rate). The ramp data group is a series of records consisting of beginning and ending times of ramp in seconds past January 1, 1950, transmitter frequency (Hz) and frequency rate (Hz/s). The orbit data summary group contains the radio band indicator; tracking network indicator; receiving station number; data type; number of points; and time of earliest and latest points. The control statement group contains BCD card images of all the Orbit Data Editor (ODE) control statements. The end-of-file group contains only the 5-word header record. It is used to indicate the end of data.

Alternate Names

  • Doppler Tracking Data at Saturn


  • Astronomy: Celestial Mechanics
  • Planetary Science: Celestial Mechanics


  • 73-019A-09B

Additional Information



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



NameRoleOriginal AffiliationE-mail
Mr. George W. NullGeneral ContactNASA Jet Propulsion
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