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LaRC Hand-Assembled Regenerated Frames

NSSDCA ID: PSPG-00128

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

Time span: 1967-05-11 to 1967-05-26

Description

This data set, which is a complete set of the usable Lunar Orbiter 4 photography, consists of over 500 first generation negative 20- by 24-in. film sheets. NASA's Langley Research Center prepared these enhanced photographs from original station video tapes by electronically preprocessing the video signal prior to input to the Ground Reconstruction Equipment (GRE). Two enhancement procedures were used. One procedure involved varying the parameters of gain function, signal gain, and signal offset to optimize detail and contrast in the photographic data. The other involved the use of an electronic mask to reduce the undesirable density gradients across the scan and framelet. Both procedures required point-by-point exposure adjustments. The enhanced photographs generated from the GRE were 35-mm positive transparencies. The positives were assembled into a 20- by 24-in. format, and contact negatives were made. One complete MR frame is contained on one sheet, whereas 3 sheets are required for one HR frame. The photographs were controlled for surface detail and are not recommended for photometric studies.

Alternate Names

  • LaRC Pix

Discipline

  • Planetary Science: Geology and Geophysics

Old NSSDCA ID

  • 67-041A-01B

Additional Information

Spacecraft

Experiments

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

 

Personnel

NameRoleOriginal AffiliationE-mail
Mr. Isidore G. RecantGeneral ContactNASA Langley Research Center
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