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Analyzed Acceleration Data, Derived from Radio Tracking, on Microfilm


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

Time span: 1969-11-19 to 1969-11-19


This data set, received from the experimenter, contains analyzed data listed on 16-mm microfilm. The first 4 pages fo each printout contain selected program parameters. For each printout, the following data are then listed in columns -- time in GMT, time in minutes (GMT), time in minutes since the reference epoch, time in minutes on the associated plot for that particular data point, and the Doppler residual (in Hz) calculated from a theoretical model containing (1) planetary perturbations, (2) earth rotation, (3) precise station locations, (4) tropospheric model, and (5) precise station transit times removed from the returned signal. Also listed are spacecraft altitude, spacecraft selenographic latitude and longitude, theoretical value of the Doppler shift calculated by the spline program used in the least squares, acceleration determined by analytic differentiation of the spline at the reference point, and a residual in Hz after the spline has fit the Doppler residuals (good data show an rms residual of about .055 Hz or less). The data cover the LM descent (10-sec an 1-sec resolutions) and the LM crash, although the LM crash data were corrupted due to rocket firings. Included on the microfilm is a copy of the article in "Science" reporting these results, as well as a copy of the program used to anaylze these data. Data from Apollo 14 and 15 are also included.

Alternate Names

  • LM Accelerations Plots on Mfilm


  • Planetary Science: Geology and Geophysics


  • 69-099C-09A

Additional Information



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



NameRoleOriginal AffiliationE-mail
Mr. William L. SjogrenData ProviderNASA Jet Propulsion
Mr. William L. SjogrenGeneral ContactNASA Jet Propulsion
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