System and method for measuring ice thickness

Details System and method for measuring ice thickness System and method for measuring ice thickness

G - Physics

01

B

349/41

G01B 17/02 (2006.01)

Patent

CA 1270939

Abstract of the Disclosure Sonar ice thickness measurement comprises transmitting an AM and subsequent CW sonic radiant energy signals from the water toward the sonic signal reflecting ice cap. Reflection of the CW signal from the water-ice interface and reflection from the water-air interface of the modulating frequency, generated by non-linear or parametric effects in the water by the modulated transmit signal, causes the CW signal to be modulated to generate side bands at the modula- ting frequency on each side of the carrier frequency to provide an FM high frequency signal. Detection of the FM signal determines the time of arrival of the echo of said detected FM signal relative to the detection of the reflected modulated signal from the water-ice interface.

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