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From: dfkling@cs.washington.edu (Dean F. Kling)
Newsgroups: sci.military
Subject: Re: Measuring range with passive sonar
Summary: Range determination
Message-ID: <27226@amdcad.AMD.COM>
Date: 13 Sep 89 08:15:06 GMT
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Organization: U of Washington, Computer Science, Seattle
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From: dfkling@cs.washington.edu (Dean F. Kling)

> Question: Can the dispersion (frequency-dependant propogation velocity) of
> sound through water be used to measure range with a single measurement?
> Seems that you could, if the target emitted a broadband signal and you
> knew the dispersion characteristics of water.
> --
> David A Honig

  The biggest problem is that seawater is decidedly non-uniform so that 
the dispersal and refraction effects would be impossible to sort out.
Range determination with passive sonar is not a particularly difficult 
problem to solve if you have sufficient bearing information over time and 
based on the relative geometry of the target and own ship.

Dean F. Kling
cs.washington.edu