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Laser Retro-Reflector Lunar Libration Data


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

Time span: 1973-01-08 to 1977-09-14


These lunar libration data are on binary magnetic tape created on a UNIVAC computer. There are five types of records on the tape. The first is a header containing start time (Julian day), stop time and mesh size. The second record is a text containing UNIVAC filldata identifying the data on the tape. The third and fourth records contain the parameter names and values, respectively. The remaining records contain reference time of difference lines, mesh spacing used in difference lines, and an array of position (angle) at reference time, derivation of angle and sum of derivation for 12 counts.

Alternate Names

  • Lunar Libration Data


  • Planetary Science: Celestial Mechanics


  • 69-059C-04D
  • 69-059C-04E
  • 71-008C-09B
  • 71-008C-09C
  • 71-063C-08B
  • 71-063C-08C
  • 73-001A-01B

Additional Information



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



NameRoleOriginal AffiliationE-mail
Dr. James G. WilliamsGeneral ContactNASA Jet Propulsion

Related Information

Lunar Ranging at McDonald Observatory

Lunar Ranging at McDonald Observatory

McDonald Laser Ranging Station (University of Texas)
Current Lunar Laser Ranging Data Sets

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