Posted by: AlexBlackwell Jul 18 2006, 08:32 PM
From the August 2006 issue of Icarus:
Cassini RADAR observations of Enceladus, Tethys, Dione, Rhea, Iapetus, Hyperion, and Phoebe
Steven J. Ostro et al.
Icarus 183, 479-490 (2006).
http://makeashorterlink.com/?K1B621D6D
Posted by: The Messenger Jul 21 2006, 01:39 PM
QUOTE
Given the hypersensitivity of water ice's absorption length to ammonia concentration, an increase in ammonia with depth could allow efficient 2.2-cm scattering from within the top one to several decimeters while attenuating 13-cm echoes, which would require a six-fold thicker scattering layer.
Good paper, Alex.
The problem I see with this picture, is the scant spectroscopic evidence of ammonia in the Saturn system.