The same content as in Fig. 1, except that the north and east components were rotated clockwise by 20° to represent misalignment before the splitting measurements. After measurement, the best-fitting splitting parameters are φ= 67°, δt= 0.88 s by the SC method in (b), φ= 30°, δt= 2.0 s by the RC method in (c) and φ= 30°, δt= 2.0 s by the EV method in (d).