Two important aspects of tidal currents are (1) their temporal coherence and (2) their constancy (over centuries). The first rigorous evaluation of an Ocean Surface Current Radar (OSCR) system exploited these characteristics using sequential deployments of the one available unit with subsequent combination of radial components to construct tidal ellipses (Prandle and Ryder 1985).

Prandle, D. 1997. Tidal and wind-driven currents from OSCR. Oceanography 10(2):57–59, https://doi.org/10.5670/oceanog.1997.23.

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