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SDDPT Mariner 9 Imaging EDR Archive Data on CD-WO


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


This data set contains the Mariner 9 imaging Experiment Data Records (EDR), which are the raw imaging data of Mars from the Mariner 9 mission, composed of approximately 7300 images obtained by the Mariner 9 TV experiment. The collection consists of images retrieved from archive EDR magnetic tapes created during the Planetary Image Conversion Task. Each Mariner 9 image file consists of 22 blocks containing 31,944 bytes per block. Each block is composed of 33 logical records of 968 bytes each. The tapes were created on an IBM system, so the VICAR Standard Format labels are written in EBCDIC. The images themselves are in arrays of 832 pixels by 700 lines. Each pixel is represented as a 9 bit value; 0 being the least light detected and 255 being the most. Details of the data set are provided by Martin et al., ``Planetary Image Conversion Task: Final Report,'' JPL Publication 85-50, 1985, which is available from NSSDC. This publication includes the only catalog currently available for the data set. These data are archived on CD-WO. The CDs were created as part of the Science Digital Data Preservation Task of the Planetary Data System. The original data tapes (held in data set 71-051A-04a) were copied directly onto CD-WO.

This data set was created at JPL as part of its Science Digital Data Preservation Task (SDDPT), and a copy was provided to NSSDC for safekeeping. Numerous SDDPT data sets are not readily usable, as they represent bit copies of old data tapes and do not contain user documentation. Persons interested in ordering these data should contact the NSSDC person listed for this data set. Freeware to view this particular data set is available at:

This data set is SPDSS ID 71-051A-0200, Volumes M71_0001 - M71_0009

The CD's are now available online and many of the images have been converted into PDS format although the data have not yet passed PDS validation. See:

Alternate Names

  • MR09-M-VIS-2-EDR-V1.1 (CD-WO)
  • MR09-M-VIS-2-EDR-V1.1


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


  • 71-051A-04c

Additional Information



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



NameRoleOriginal AffiliationE-mail
Ms. Amy Hochstettler CulverData ProviderNASA Jet Propulsion
Mr. Eric EliasonGeneral ContactUS Geological

Selected References

  • Martin, M. D., et al., Planetary image conversion task, JPL, Calif. Inst. Technol., 85-50, Pasadena, CA, Sept. 1985.

Obtaining the Data at the Planetary Data System (PDS)

Mariner 9 EDR on-line (PDS Imaging)

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