RECONSTRUCTION OF VERTICAL OZONE DISTRIBUTION FROM UMKEHR ESTIMATES (REVUE) Coordinator : Sophie GODIN Contractors : C1 Service d'Aéronomie CNRS (S. Godin) C2 LAP-AUTH (C. Zerefos,E. Kosmidis) C3 INM (E. Cuevas, A. Redondas) C4 CNR (L. Stefanutti, D. Guzzi) Consultants : R. Bojkov J. DeLuisi Reporting period : March 1996 – December 1999