NASA Logo, National Aeronautics and Space Administration
NASA Space Science Data Coordinated Archive Header

VO1/VO2 Mars Visual Imaging SS Experiment Data Record V2.0 (PDS)


Availability: Archived at NSSDC, accessible from elsewhere

Time span: 1975-10-21 to 1980-07-30


This description was generated automatically using input from the Planetary Data System.

This data set includes sub-sampled versions of Viking Orbiter images that are intended to facilitate rapid viewing of the image collection. The image data in these browse images have been reduced in size by sub-sampling the original image by a factor of 4 in both lines and samples. Thus, the data volume has been reduced by a factor of 16. A Viking Orbiter browse image contains 264 lines and 300 samples. A filtering procedure was used in generating the browse images because Viking Orbiter images commonly contain noisy data or are missing data. The brightness value of a pixel in a browse image is the median brightness value of an array of 4 by 4 pixels from the original image. If the 4 by 4 array of original pixels contained zero values, those zero value pixels were not used in determining the median value. Of course, if the entire 4 by 4 array contained zero value pixels, the corresponding pixel in the browse image was assigned a zero value.

This collection replaces an identical collection delivered on CD-ROM: PSPA-00073, Viking Orbiter Raw Image Archive on CD-ROM (PDS).

These data are available on-line from the Planetary Data System (PDS) at: or at:

Alternate Names

  • Viking Orbiter Raw Image Archive
  • VO1/VO2 Mars Visual Imaging SS Experiment Data Record Browse V2.0 (PDS)
  • VO1/VO2-M-VIS-2-EDR-BR-V2.O
  • VO1/VO2-M-VIS-2-EDR-V2.0


  • Planetary Science: Atmospheres
  • Planetary Science: Small Bodies
  • Planetary Science: Geology and Geophysics

Additional Information



Questions and comments about this data collection can be directed to: Dr. David R. Williams



NameRoleOriginal AffiliationE-mail
Dr. Edward A. GuinnessGeneral ContactWashington
[] NASA Logo -