High-quality charge-coupled device spectroscopic observations at different regions of Jupiter in the spectral regions &lgr;&lgr; 6000--6600 and 8700--9200 ¿ at a resolution of 1.2 ¿ have been obtained. These spectra allowed us to obtain the center-to-limb curves of the equivalent widths of the CH4 6190-¿ band, the NH3 6450--¿ band, and the band depth of the 8900-¿ band, as well as their latitudinal distribution. Some asymmetries in the center-to-limb distribution of the equivalent widths of the CH4 6190-¿ and NH3 6450-¿ 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-¿ and NH3 6450-¿ 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 &lgr;=8900 ¿. Model computations for the Equatorial Region assuming three aerosol layer models gave some constraints on tropospheric atmospheric parameters during the 1989 Jupiter opposition data. ¿American Geophysical Union 1991