Fig. 1. 3D radiation model structure diagram of the sea surface

Fig. 2. 3D structure of the sea surface under different sea conditions. (a) Level 1 sea state; (b) Level 2 sea state; (c) Level 3 sea state; (d) Level 4 sea state

Fig. 3. BRDF of seawater at different wavebands calculated by 6S

Fig. 4. Reflectivity of the whitecaps at different zenith and azimuths angles

Fig. 5. Patch type judgment

Fig. 6. High-resolution satellite ocean background imaging simulation flowchart

Fig. 7. [in Chinese]

Fig. 7. Radiation field at the entrance pupil of the satellite under different wave levels. L1: Level 1 waves; L2: Level 2 waves; L3: Level 3 waves; L4: Level 4 waves

Fig. 8. ZY3-02 star PMS load spectral response function

Fig. 9. Calculated camera point spread function and MTF curve. (a) Point spread function; (b) MTF

Fig. 10. Comparison of simulation results with satellite data. (a) Simulating the sea surface of Band1; (b) ZY3-02 measured sea surface of Band1; (c) Simulating the sea surface of Band2; (d) ZY3-02 measured sea surface of Band2; (e) Simulating the sea surface of Band3; (f) ZY3-02 measuring the sea surface of Band3

Fig. 11. [in Chinese]

Fig. 11. Comparison of radiation distribution between simulated and measured results. (a) Simulating the sea surface of Band1; (b) ZY3-02 measured sea surface of Band1; (c) Simulating the sea surface of Band2; (d) ZY3-02 measured sea surface of Band2; (e) Simulating the sea surface of Band3; (f) ZY3-02 measuring the sea surface of Band3

Table 1. Sea state table

Table 2. Input parameter table of 6S

Table 3. Simulation conditions

Table 4. Comparison of simulation results and measured results