This figure shows the region around lunar dome Herodotus w.
The original images are shown in (a). Solar elevation angles are m1
= 5.0° (image of April 13, 2003) and
m2 = 15.5° (image of March
26, 2002). For further evaluation, the images are rectified due to
the proximity of this region to the Moon's apparent limb. The albedo map
is shown in (b), where the contrast has been enhanced. It displays a gradient
in surface brightness from the south-eastern (lower right) to the north-western
(upper left) corner along with several ray structures running radially
with respect to the crater Aristarchus. The reconstructed 3D surface profile
is shown in (c). Here, the slight overall bending of the surface profile
reflects the Moon's spherical shape. The surface profile displays several
shallow ridges with altitudes of roughly 50 m along with the lunar dome.
This example shows how intensity variations due to changing albedo can be
separated from those due to the 3D surface structure by means of an evaluation
of two pixel-synchronous images acquired under different illumination
conditions.
