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Open AccessArticle

Validation of the Significant Wave Height Product of HY-2 Altimeter

1
National Ocean Technology Center, State Oceanic Administration, Tianjin 300112, China
2
National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China
3
Qingdao University, Qingdao 266003, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2017, 9(10), 1016; https://doi.org/10.3390/rs9101016
Received: 14 August 2017 / Revised: 22 September 2017 / Accepted: 29 September 2017 / Published: 30 September 2017
(This article belongs to the Special Issue Ocean Radar)
HY-2 was launched by China on August 2011, which has provided continuous wave height measurements to monitor ocean dynamic environments for more than 5 years. Before using these data, however, the measurements need to be validated. Based on the in situ buoy data from the National Data Buoy Center (NDBC) and the Jason-2 altimeter data, the HY-2 Ku-band significant wave height (SWH) measurements were validated. The comparisons showed that a linear regression with NDBC measurements can be used to improve the accuracy of the HY-2 SWH measurements. Compared with the NDBC SWH data, the validation results of the HY-2 SWH data show an RMS (root mean square) of 0.33 m, which is similar to that of the Jason-1 and Jason-2 data; the RMS of the HY-2 SWH is 0.30 m, which, corrected via linear regression, is similar to that of the corrected Jason-1 and Jason-2 data (0.27 m and 0.23 m, respectively). Therefore, the accuracy of the HY-2 SWH products is close to that of the Jason-1/2 SWH data. View Full-Text
Keywords: HY-2 satellite altimeter; significant wave height; validation; linear regression; root mean square HY-2 satellite altimeter; significant wave height; validation; linear regression; root mean square
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MDPI and ACS Style

Chen, C.; Zhu, J.; Lin, M.; Zhao, Y.; Wang, H.; Wang, J. Validation of the Significant Wave Height Product of HY-2 Altimeter. Remote Sens. 2017, 9, 1016.

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