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JoeL
 
> Any clue about how the WKPP mapper design compares to the USDCT's? The 
> Wakky II mapper was central to the project's success or failure since 
> they failed to deliver on the "tripple the distance" challenge, so I'd be 
> interested in what was similar/different.

The only information that I have on the USDCT comes from their public
webpage, so I won't comment on their mapper. The WKPP mapper uses an
electronically steerable beam that can be specified in 1 degree
increments.

 
> NASA has put up probes that map other astral bodies with great detail in 
> 3D, I'm sure this isn't beyond the curent state of technology, but I'd 
> like to see some actual maps.

Sonar mapping in a cave is complicated by the strong multipath echoes
that are produced when the signal ricochets off the cave walls. The
geomemetry of the cave and the smoothness of the walls with respect to
the frequency of the signal determines the degree to which multipath
signals are a problem. This is more complicated than interpreting sonar
data in open water. There are techniques for distinguishing between
direct echoes and multipath echoes. The USDCT signal processing people
may or may not be aware of these.

-John

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