I have an 'inexpensive' TDR, and a while back had access to an expensive one. And I don't think you could do it with one... It needs two conductors... But if you had some sort of referance rod - MIGHT..... But dont think it would be too accurate through soil... There may be some other type of tool that works on the same principle. Megger makes some other stuff and they are the big guys of that type of test gear...
