(a) (b) FIGURE 15. A comparison of (a) an actual SAR clutter and (b) a simulated SAR clutter of various scenarios based on the GGCS model. From left to right: sea 1, sea 2, sea 3, and sea 4. (a) (b) FIGURE 16. A comparison of (a) an actual SAR clutter and (b) a simulated SAR clutter of various scenarios based on the GGCS model. From left to right: urban, farmland, forest 2, and road images. MARCH 2021 IEEE GEOSCIENCE AND REMOTE SENSING MAGAZINE 135