| Species | Technique | Uncertainty | Principal Investigator | Reference |
| O3 | SAE 1003 (UV abs) | 2%+2ppb | A. Marenco/Lab. d'Aerologie | Marenco and Said, 1989 |
| CO | GC/FID | 4 ppb | A. Marenco/Lab. d'Aerologie | Marenco et al., 1989 |
| NO | O3-chemiluminescence | 15% | D. Ehhalt/KFA Julich | Drummond et al., 1988 |
Drummond et al., J. Geophys. Res., 93, 15,831, 1988.
Marenco and Said, Atmos. Environ., 23, 201, 1989.
Marenco et al., Atmos. Environ., 23, 185, 1989.
Marenco et al., Atmos. Environ., 24A, 2823, 1990.
Ehhalt et al., J. Geophys. Res., 97, 3725, 1992.
Marenco et al., in Global Environmental Change, ed. W.C. Wand
and I.S.A. Isaksen, NATO ASI Ser., 32, 305, 1995.