A Method for Rainfall Detection and Rainfall Intensity Level Retrieval from X-Band Marine Radar Images

Currently, it is a hot research topic to retrieve the wave parameters by using X-band marine radar. However, rainfall noise usually exists in collected radar images, which seriously interferes with extraction of parameters. To reduce influence noise, zero-pixel percentage (ZPP) method widely used detect but detection accuracy limited, and selection threshold needs be further studied. Based on ZPP method, ratio zero intensity echo (RZE) for proposed this paper. The determined statistical analysis large amount data. Additionally, first time level from images. In addition, concept occlusion area proposed. are as image, respectively, experimental research. data obtained Pingtan base Fujian Province verify effectiveness method. results show that 11.7% higher than retrieval 84%.