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Tables of Mass Peaks (ASCII)


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


This collection is a conversion by the NSSDCA of binary data set PSPA-00147 to ASCII format. The contents consist of 148 ASCII data files and data description document. Each ASCII data file contains time-ordered, interleaved, spectral measurements (raw counts) for each of the three mass ranges scanned simultaneously by LACE: 1 to 4, 12 to 48, and 27.4 to 110 atomic mass unit (amu). The data are scans through the mass spectrum produced by sweeping the ion accelerating voltage in a stepwise manner from 320 to 1420 V in 1330 steps with a dwell time of 0.6 seconds per step and recording the counts at each step for the three mass ranges. An additional 10 steps of background counts (zero sweep voltage) and 10 steps of internal calibration between sweeps brings the total number of counts per sweep sequence to 1350 in the original binary data (PSPA-00147), but these counts are not included in the ASCII data files contained in this collection. These data are also on microfilm as collection PSPA-00321.


  • Planetary Science: Atmospheres

Additional Information



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



NameRoleOriginal AffiliationE-mail
Dr. John H. HoffmanGeneral ContactUniversity of Texas, Dallas
Dr. Richard R. Hodges, Jr.General ContactUniversity of Texas, Dallas

Selected References

  • Lauderdale, W. W., and W. F. Eichelman, Apollo scientific experiments data handbook, NASA, TM-X-58131, Houston, Tex., Aug. 1974, updated Aug. 1976.
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