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Discrete cloud activity in Saturn's equator during 1995, 1996 and 1997

Rojas, J. F.; Colas, F.; Lecacheux, J. +2 more

A regular extensive CCD imaging of Saturn allowed us to analyze the discrete cloud activity in the Equatorial Zone from 1995 to 1997. The large-scale storm observed in 1994 at +10° ( Sanchez-Lavega et al., 1994, 1996) was rediscovered in 1995, reaching a lifetime >1 year. Its slow motion characterized by a zonal velocity difference of -150 ms <…

The Raman signature of H2 in the uv spectra of Uranus and Neptune: Constraints on the haze optical properties and on the para-H2 fraction

Courtin, Régis

The geometric albedos of Uranus and Neptune, inferred from archived Hubble Space Telescope observations and from the ground-based measurements of Karkoschka, 1994, are modeled in the wavelength range 2200-4200 Å. The radiative transfer model, which includes Rayleigh-Raman scattering and Mie scattering by haze particles, aims at reproducing the fin…