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Earth, Planets and Space
Fig. 4 | Earth, Planets and Space

Fig. 4

From: Extracting clearer tsunami currents from shipborne Automatic Identification System data using ship yaw and equation of ship response

Fig. 4Fig. 4

Time series of AIS data of selected ships (#2, #3, #5, and #11). a COG (blue) and HDG (red), b COG minus HDG, c ROT, d HDG-normal components (vn) of ship velocity and tsunami current, e HDG-parallel components (vp) of ship velocity and tsunami current, and f SOG. In d and e, solid lines indicate the ship velocity derived from the AIS data, and dashed lines indicate the tsunami current derived from the tsunami wave simulation using the initial condition of Hossen et al. (2015). Each value shown in e is a reference ship velocity (m/s) that is subtracted from the HDG-parallel velocity

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