Studies of GNSS-R ocean altimetry using full DDM-based retrieval

Global Navigation Satellite Signals Reflection (GNSS-R) observations can be used for measurements of sea surface height (SSH). Many previous studies have examined the method, and have focused on the use of delay waveforms (DW) in the retrieval of SSH information from GNSS-R measurements. The delay waveform is one “cut” from a complete Delay Doppler Map (DDM), which is defined as the amplitude/power distribution of the reflected signal in a 2-D array of delay offsets and Doppler shifts around the specular point.