Sure - this paper (PDF warning) is a decent place to start learning about how the process works. http://quebec.hwr.arizona.edu/classes/hwr432/2014/jones02-TDR-p

Sure - this paper (PDF warning) is a decent place to start learning about how the process works. http://quebec.hwr.arizona.edu/classes/hwr432/2014/jones02-TDR-principle-applications.pdf http://quebec.hwr.arizona.edu/classes/hwr432/2014/jones02-TD... I haven't looked at the industry in a couple of years, but I think that many of the high-end commercial sensors use some variation of this technique.