As mentioned before, we have been able to fit the 2.19 - 2.32 micron
spectrum of the E impact site, which shows CH4 absorption features,
using a reflecting-layer model in which the only free parameter is
the altitude of the cloud layer. Assuming normal stratospheric
CH4 abundances, the fit gives an altitude for the impact-generated
cloud of about 2 millibars, though it could be higher if the impact
has enhanced the CH4 abundance above the cloud.
We have put a postscript file of the E site spectrum and the model fit in pub/impact on sunkng.lowell.edu, 192.103.11.2. The name is SiteEspec.ps. Also in this directory are three OSIRIS images of the impact sites, taken before the weather deteriorated here at CTIO a couple of days ago.
John Spencer, Darren DePoy, Sang Kim, OSIRIS, CTIO 4-meter.