Tracking the velocity and position of offshore vessels and floating objects with HF Doppler transponders
M. W. Evans, Thomas M. Georges, B. Weber · IEEE Journal of Oceanic Engineering · 1981
Experiments with a high-frequency (HF) Doppler radar and a frequency-shifting transponder show that the velocity and position of ships or floating objects can be tracked without the need for accurate differential-position measurements. Maximum-entropy spectral analysis permits tracking during rapid maneuvers using sampling times as short as 4 s.