Journal of Sensors / 2016 / Article / Tab 1

Research Article

Visibility of River Plume Fronts with an X-Band Radar

Table 1

Mean front intensity of the river plume front with respect to the wind speed and direction. The frequency is the number of images in the category. The three numbers shown in the breakdown denote the percentage of images assessed with front intensities of 0, 1, and 2, respectively.

Wind direction
NWN, N, NNE
SSW, S, and SSE
NW, NE
SW, and SE
ENE, E, ESE
WSW, W, and WNW

Wind speed [m/s]
 >6
  Mean front intensity0.290.790.96
  Frequency 35 199 1497
  Breakdown [%] (77, 17, and 6) (38, 45, and 17) (31, 42, and 27)
 3, 4, and 5
  Mean front intensity0.240.360.60
  Frequency 463 611 2284
  Breakdown [%](80, 16, and 4)(72, 21, and 7)(54, 31, and 15)
 1 and 2
  Mean front intensity0.070.160.24
  Frequency 1321 427 465
  Breakdown [%](94, 5, and 1)(88, 8, and 4)(81, 14, and 5)

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