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Remote Sens. 2017, 9(10), 1016; https://doi.org/10.3390/rs9101016

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.
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)
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Abstract

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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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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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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