Version November 14, 2001 
  (previous version April 19, 1996) 
  PI:       Wilford Gardner, Mary Jo Richardson, and Ian Walsh 
  dataset:  Particulate Matter (PM) concentration, Niskin Bottle Filtration 
  cruise:   Arabian Sea TTN-045, Process cruise 2 (Inter-Monsoon) 
  ship:     R/V Thomas Thompson