ABLE-3B Electra 1990/07/06-1990/08/15
  acet: CH3COCH3 [pptv]
  c2h6: C2H6 [pptv]
  c3h8: C3H8 [pptv]
  co: CO [ppbv]
  dialo3: DIAL_O3 [ppbv]
  hno3: HNO3 [pptv]
  hno3nox: HNO3/NOx [pptv/pptv]
  noday:  NO [pptv] SZA<90
  nox: NOx [pptv]
  o3: O3 [ppbv]
  pan: PAN [pptv]
  pannox: PAN/NOx [pptv/pptv]