We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Validation and Calibration of Nadir SWH Products From CFOSAT and HY-2B With Satellites and In Situ Observations.
- Authors
Xiuzhong Li; Ying Xu; Baochang Liu; Yijun He; Jianqiang Liu
- Abstract
The China France Oceanography Satellite (CFOSAT) and Haiyang-2B (HY-2B) satellites were successively launched in China on the 29th and 25th of October 2018, respectively. HY-2 B carries the second Chinese radar altimeter along with three other microwave sensors, whereas CFOSAT contains the first Surface Waves Investigation and Monitoring (SWIM) instrument and a fan beam rotating scatterometer. As missions for measuring the dynamic marine environment, both satellites can measure the nadir significant wave height (SWH). For data obtained from a newly launched satellite to be utilized with confidence, the quality of SWH from the two satellites requires validation. In this study, the HY-2B altimeter and CFOSAT nadir SWHs have been validated against the National Data Buoy Center (NDBC) buoys and the Jason-3 altimeter SWH data, respectively, which resulted in CFOSAT nadir SWH having the best accuracy and HY-2B having the best precision. The SWHs of the two missions are also calibrated by Jason-3 and NDBC buoys. Following calibration, the root mean square error (RMSE) of CFOSAT and HY-2B are 0.21 and 0.27 m, respectively, when compared to Jason-3, and 0.23 and 0.30 m, respectively, compared to the buoys. Our results show that the two missions can provide good-quality SWH and can be relied upon as a new data resource of global SWH. Plain Language Summary CFOSAT and HY-2B are new satellites launched approximately one and a half years ago. Both have the capability to provide global ocean wave observations, the quality of which is critical, especially in climate change research. In this study, the SWH from both satellites are validated against the NDBC buoy and Jason-3 altimeter SWH data. Lastly, a calibration method is used for the application of the new SWH data.
- Subjects
RADAR in oceanography; ALTIMETERS; SURFACE waves (Seismic waves); OCEANOGRAPHY; MARINE ecology
- Publication
Journal of Geophysical Research. Oceans, 2021, Vol 126, Issue 2, p1
- ISSN
2169-9275
- Publication type
Article
- DOI
10.1029/2020JC016689