Fig. 28. 2-Component `Fits' to the Ganymede Spectrum Shapes 

The solid curves show fitted temperature contrast and spectrum slope as a function of local time for the 2-component surface of Fig. 27, assuming no topography. The arrows indicate times when topography is likely to increase spectrum slopes and temperature contrasts. The dashed lines show spectrum shapes from the best-fit 2-layer model of Figs. 25 and 26, assuming an emissivity of 0.94 (on the upper plot this line runs along the x axis). The points show Ganymede spectrum shapes seen by both Voyagers, for all spectra within 30o of the equator.
Click here for hi-res. figure suitable for printing.