First In-Orbit Validation of Interferometric GNSS-R Altimetry

This advanced instrument features dual-frequency, multi-beam scanning capabilities, interferometric processing, and compatibility with three major satellite navigation systems: the BeiDou Navigation Satellite System (BDS), the Global Positioning System (GPS), and the Galileo Satellite Navigation System (GAL).The figures included in this dataset depict typical coherent and incoherent interferometric waveforms collected over sea ice and open ocean surfaces, corresponding to BDS, GPS, and GAL, respectively.

To enhance the accuracy of sea surface height (SSH) retrieval, we developed a refined Delay Mapping (DM) waveform matching algorithm. This algorithm precisely extracts the propagation delays between reflected and direct GNSS signals, enabling the retrieval of global SSH through the interferometric altimetry model. The dataset lists waveform matching cases for BDS iGNSS-R DMs.For validation, we employed an inter-satellite crossover approach, using Jason-3 and Sentinel-6 radar altimetry as references.