“…Stratospheric NO 2 measurements have been carried out since the 1970s from a variety of airborne and ground-based platforms using in-situ and remote sensing techniques (e.g., Noxon et al, 1979;Coffey et al, 1981;Kondo et al, 1985;Roscoe et al, 1986;Pommereau and Goutail, 1988;Webster et al, 1990;Pfeilsticker and Platt, 1994;Chance et al, 1996;Renard et al, 1996;Wetzel et al, 1997;Sen et al, 1998;Payan et al, 1999).…”