Starting from July 2021 to September 2023 Space: Global Ocean Regions Sampling interval: 10 kilometers Processing process: Due to the ground interval of the original FY-3E GNSS-R trajectory sampling points being 5.2km, in order to meet the requirement of independent sampling for height measurement with a resolution of 10km, based on the downloaded FY-3E L2 level GNSS-R initial trajectory, downsampling reduces the trajectory sampling interval to 10km per reflection point. Using software: Matlab