Iceberg Detection Using Compact Polarimetric Synthetic Aperture Radar

Figures & data

Table 1. An overview of the RADARSAT-2 fine-quad scenes used in our study. Beam refers to the fine quad beam position, W.S. stands for estimated wind speed for the scene and N is an estimated reconstruction parameter (see Section 2b).

Scene ID	Beam	Inc. Angle	W.S. (m s^−1)
09051	2	19.9°–21.8°	5.0	51.0
09052	2	19.9°–21.8°	5.0	49.4
09151	2	19.8°–21.8°	<3	39.4
09152	2	19.8°–21.8°	<3	44.1
08051	5	23.4°–25.3°	1.3	4.5
08052	5	23.4°–25.3°	1.5	8.5
08291	5	23.4°–25.3°	<3	22.3
08292	5	23.4°–25.3°	3.2	29.1
08152	6	24.6°–26.5°	5.9	18.8
08221	7	25.8°–27.6°	3.8	17.7
08222	7	25.8°–27.6°	4.4	17.5
08151	9	28.0°–29.9°	3.9	10.0
09081	10	29.2°–30.9°	5.2	13.8
09082	10	29.2°–30.9°	5.3	13.4
08251	11	30.3°–32.0°	5.9	11.1
08252	11	30.3°–32.0°	5.8	11.1
08181	16	35.5°–37.0°	6.8	7.6
08041	17	36.5°–38.0°	5.0	8.3
08042	17	36.5°–38.0°	5.1	8.2
09111	17	36.5°–38.0°	5.3	8.6
09112	17	36.5°–38.0°	6.6	9.1

Fig. 1 Mean N value versus mean incidence angle for each scene. The red line shows the regression y  = 300900x ^−2.936 , with r² of 0.935.

Table 2. Probabilities of missed detection for icebergs at a fixed probability of false alarm equal (PFA) of 10⁻⁶. Iceberg IDs are letters. When an iceberg has been observed in more than one scene, it also has a number to differentiate the sightings. The lowest PMD is shaded a dark grey. In cases where the lowest PMD was achieved with the quad-pol data, the next lowest non-quad-pol detector is also shaded with dark grey. Detectors whose PMD is within 0.05 of the lowest PMD are shaded with lighter grey.

Fig. 2 Median ROC curves for the four incidence angle ranges.