NSSDCA ID: PSNO-00001
Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)
This data set contains Viking Lander 2 Library Support File Stack Tapes. The stack tapes were generated for use by the Viking Data Library during the active Viking mission. They contain product summary records, and while they hold valuable information, they are known to be inaccurate in some places. They have been recommended for archival and approved by the SDEB, because of their relevance to the archive imaging EDRs.
The data was copied from 7-track tapes that, in most cases, were at least 15-20 years old. The original 6-bit data was converted to 8 bits by replacing the first (parity) bit with two zero bits. The 7-track data was originally written in "snaked" format with attached EBCDIC VICAR labels in front of the data. Accompanying each tape on the disc, there is a log file which documents SDDPT processing history. The file DFL_INFO.TXT correlates the tape ID with available descriptions of the tapes' contents and the tracks. Each CD-ROM disc has been formatted so that a variety of computer systems (e.g. IBM PC, Macintosh, Sun, VAX) may access the data. Specifically, the discs are formatted according to the ISO 9660 level 1 Interchange Standard, and file attributes are specified by Extended Attribute Records (XARs)
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.
This is SDDPT data set code 75-083A-0029, volume ID VO2_6001.
Questions and comments about this data collection can be directed to: Dr. David R. Williams
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Francisco Loaiza | Data Provider | NASA Jet Propulsion Laboratory | loaiza@mailhost4.jpl.nasa.gov |
Ms. Susan K. LaVoie | General Contact | NASA Jet Propulsion Laboratory | sue.k.lavoie@jpl.nasa.gov |