NSSDCA ID: PSPG-00169
Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)
Time span: 1969-07-31 to 1969-07-31
This data set consists of two decalibrated versions of the 25 near-encounter photographs of Mars from the television investigation. These versions are on 70-mm negative film and were digitally processed to remove the effects of the TV system and to depict the actual scene luminance and large-scale albedo variations, not small-scale detail. The representation is rather flat in contrast for all the Martian terrain tonal characteristics. The spacecraft vidicons were calibrated to determine the relationship between the input luminance and the camera output signal as a function of position in each frame. Each picture element was then treated as a tiny photometer with unique transfer properties. The recorded output signal was converted to the actual scene luminance, and the result was stored in the corrected output image for these photometrically decalibrated photographs.
Questions and comments about this data collection can be directed to: Coordinated Request and User Support Office
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Robert B. Leighton | General Contact | California Institute of Technology |