The attenuation rate of the electromagnetic energy in samples of fresh water has been measured at frequencies between 33 and 363 MHz. The technique employed the HP 8410A network analyzer and a broadband transmission resonance cavity and provided reliable results which agree well with theory. The results suggest that it should be possible to develop a VHF radar system capable of sensing the depth of shallow fresh water for remote sensing applications. Copyright

doi.org/10.1109/TIM.1979.4314763
IEEE Transactions on Instrumentation and Measurement
Department of Electronics

Hafez, H.M., Chudobiak, W.J. (Walter J.), & Wight, J. S. (1979). The Attenuation Rate in Fresh Water at VHF Frequencies. IEEE Transactions on Instrumentation and Measurement, 28(1), 71–74. doi:10.1109/TIM.1979.4314763