Fig. 35. Reflectance Spectra of Europa, Ganymede, and Callisto.
Data are from McFadden et al (1980) shortward of 0.8 microns, Clark
(1980) from 0.8--2.5 microns, Pollack et al
(1978) from 2.5--2.7
microns, and Lebofsky and Feierberg (1985) longward of 2.7 microns. The
Europa spectrum is of the trailing hemisphere only, while the Ganymede
and Callisto spectra are leading hemisphere up to 2.5 microns and at longer
wavelengths contain data from various orbital phases. Subearth longitude
and 0.8\dmic\ geometric albedo (see text for derivation) for the Clark
(1980) portion of the spectra are as follows: Europa, 243o,
0.64; Ganymede, 94o, 0.48; and Callisto 135o, 0.19.
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