Charged-coupled device spectral images of spatially resolved regions of Jupiter in the 6190- and 8900-Å ammonia bands during the 1989 opposition

High-quality charge-coupled device spectroscopic observations at different regions of Jupiter in the spectral regions λλ 6000-6600 and 8700-9200 Å at a resolution of 1.2 Å have been obtained. These spectra allowed us to obtain the center-to-limb curves of the equivalent widths of the CH₄ 6190-Å band, the NH₃ 6450-Å band, and the band depth of the 8900-Å band, as well as their latitudinal distribution. Some asymmetries in the center-to-limb distribution of the equivalent widths of the CH₄ 6190-Å and NH₃ 6450-Å bands were detected, as well as a very prominent decrease toward the planetary limbs for the ammonia band. The latitudinal variations of the CH₄ 6190-Å and NH₃ 6450-Å equivalent widths were strongly correlated for fractional radii less than 0.4, with a maximum of absorption at the North Equatorial Belt. The South Equatorial Belt, undetectable at visible and near-infrared continuum wavelengths, was discernable at λ=8900 Å. Model computations for the Equatorial Region assuming three aerosol layer models gave some constraints on tropospheric atmospheric parameters during the 1989 Jupiter opposition data.