Document list:
   BRACE    Appendix A from Brace et al which describes some of the
             characteristics of the PVO ion detectors and their inter-
             calibration.

   GREBOWSK Appendix from Grebowsky et al (JGR, 1993) which discusses         
             the OIMS instrument response to superthermal ions.                

   MILLER   Miller et al (Icarus, 1984) - This paper also discusses some
             of the characteristics of the PVO ions detectors and their
             intercalibration.

This directory contains the PVO project documentation describing the ONMS data
as supplied by IEEE Transactions on Geoscience and Remote Sensing, GE-18,
Num 1, 60-65, 1980.