Determination of polar stratospheric cloud properties utilizing observations from SAGE III and ILAS

The SAGE Ill and ILAS instruments are scheduled to be launched in 1998 and 1996, respectively. These instruments will provide unique information regarding the composition and size distribution of poiar stratosphere clouds. SAGE ffi, scheduled for a METEOR 3M launch, will provide aerosol extinction measurements at 7 wavelengths in the visible and near-infrared (385, 450, 525, 750, 940, 1020, and 1550 nm) from which the aerosol size distribution may be inferred. ILAS, which will be launched aboard ADEOS, will provide continuous spectral coverage between 6 and 12 tim. Extinction by aerosol at these wavelengths is strongly dependent on the composition of the aerosol. The combination of measurements from these instruments should provide substantially improved understanding of the microphysical character of PSCs and, ultimately, into ozone depletion.