The latest submission of the CN and Scattering data (tcaerp??.pmt
  files) for Tony Clarke has been revised as of 2/23/98.  All flights have
  a new header detailing some of the points mentioned in this update.txt
  file.  Among the points is that the CN-3010 size cut has been changed from
  10 nanometers to 9 nanometers (nominal).  It is designated as "nominal"
  because the instrument experienced temperature effects which affected its
  performance.  This was most evident after flight 11 when sampling at high
  altitudes and where there were "small" particles present (< 15 nm).  The
  reason it appears mostly after flight 11 is that a new temperature controller
  was installed at that time (which only seemed to make the instrument's
  performance worse).  Additionally, the CN-3010 experienced flow problems
  on several flights (7, and 17 thru 19).  For flight 7, the 3010 data was
  removed, while the 3010 data for flights 17 thru 19 were corrected and
  resubmitted.  The size cut for the 3760C and 3760H instruments was changed
  from 13 to 11 nm after reevaluating the performance of the two instruments.
  It is not listed as nominal since these two instruments were more robust in
  their performance, and as such, the 3760C should be regarded as more reliable
  than the 3010.  Also, the UCN-3025 experienced flow calibration problems that
  are undetermined at this time for flights 5 thru 10.  Because of this, the
  data was not removed or corrected--care should be taken in analyzing the
  UCN data for this time period.