Wet troposphere delay combined correction method and system for wide swath altimeter

The invention provides a wet troposphere delay combined correction method and system for a wide-swath altimeter, and relates to the technical field of ocean remote sensing, and the method comprises the steps: obtaining the coordinates of a center point of an observation image and a wet troposphere delay correction value (MWR measurement value) of a satellite-borne microwave correction radiometer; according to the coordinates of the center point of the observation image and a pre-calculated and stored space correlation scale map, determining a cross-track transfer function of the wide swath altimeter, extracting temperature and specific humidity which are consistent with the space-time range of the wide swath altimeter, and calculating a zenith wet troposphere delay correction value (NWM model value) of a numerical weather model; and according to the MWR measurement value, the cross-track transfer function and the NWM model value, calculating a wide-swath zenith wet troposphere delay correction value, and carr