Evaluation of HY-2 Series Satellites Mapping Capability on Mesoscale Eddies

With the launches of HY-2B, HY-2C and HY-2D, National Satellite Ocean Application Service (NSOAS) successfully established first batch HY-2 constellation on 19 May 2021, dedicated to detecting marine dynamic environment. While validation calibration series satellites have been well studied, using both in situ cross-track measurements, further evaluation is required mapping capability mesoscale eddies. In this study, we conducted two groups pseudo-observations obtained by ocean models output at positions times satellite along ground tracks. The altimetry combinations are Jason-3+Sentinel-3A/B configuration (reference group) Jason-3+Sentinel-3A/B+HY-2B/C/D (evaluation group). Three regions different latitudes were selected as study areas. Then, gridded tracks into synthetic SSH products for each group. Finally, attributes eddies extracted from analyzed evaluate satellites. Our results suggest that more similar model data compared reference groups, with a maximum difference reduced 23%. terms eddy identification, can alleviate incorrect estimation add details spatial distribution radius amplitude. Additionally, displayed better performance detection, enhancement 14% 16% recognition rate accuracy.