Fig. 19. Shape of Thermal Emission Spectra from Topographic Model B (Triangular
Trench):
Comparison with Europa and Ganymede. Fitted temperature contrast and spectrum
slope are shown as a function of solar incidence, for a trench albedo of
0.45. The hatched pair of ribbons in each plot refer to trench depth D=0.25,
the plain ribbons are for
D=0.5. The left-hand member of each ibbon
pair is for trench surface coverage X=0.15, the right-hand ribbon
is for X=0.6. The width of the ribbon shows the range of variation
in spectrum shape with emission angle, for emission angle values of 0o,
and 30o
on either side of the vertical. Also shown are the shapes
of all on-planet IRIS spectra of Ganymede and Europa.
Click here for hi-res. figure suitable for printing.