PEM-West-A DC-8 1991/09/16-1991/10/21
  c2h4: C2H4 [pptv]
  c2h6: C2H6 [pptv]
  c3h6: C3H6 [pptv]
  c3h8: C3H8 [pptv]
  c3h8c2h6: C3H8/C2H6 [pptv/pptv]
  ch3ooh: CH3OOH [pptv]
  co: CO [ppbv]
  dialo3: DIAL_O3 [ppbv]
  h2o2: H2O2 [pptv]
  h2o2ch3ooh: H2O2/CH3OOH [pptv/pptv]
  hno3: HNO3 [pptv]
  hno3nox: HNO3/NOx [pptv/pptv]
  lo3: L(O3) [ppbv/day]
  noday:  NO [pptv] SZA<90
  nox: NOx [pptv]
  o3: O3 [ppbv]
  pan: PAN [pptv]
  pannox: PAN/NOx [pptv/pptv]
  pnet: Pnet(O3) [ppbv/day]
  po3: P(O3) [ppbv/day]