Underwater motion and physiological sensing using UHF doppler radar

The feasibility of Doppler radar measurement of physiological data from fish is demonstrated with a simple radar system. Detected motion includes body movement (locomotion), fin movement and other signals, such as gill movement. A video reference provides verification of the measured quantities for body and fin motion. The technology demonstrated in this experiment is expected to form the basis for systems that accurately sense gill and heart motion from moving fish in their natural environment.