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Article

Global Assessments of the HY-2B Measurements and Cross-Calibrations with Jason-3

1
National Satellite Ocean Application Service, Beijing 100081, China
2
Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
3
Key Laboratory of Space Ocean Remote Sensing and Application (MNR), Beijing 100142, China
4
First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2020, 12(15), 2470; https://doi.org/10.3390/rs12152470
Received: 26 May 2020 / Revised: 24 July 2020 / Accepted: 24 July 2020 / Published: 1 August 2020
(This article belongs to the Special Issue Calibration and Validation of Satellite Altimetry)
The HY-2B satellite was successfully launched on 25 October 2018. One of the main payloads of the HY-2B was a radar altimeter. In the present study, the quality of the HY-2B along-track sea surface heights (SSH), significant wave heights (SWH), and sea surface wind speeds (SSWS) were assessed, including their precision and accuracy. In order to achieve this goal, the mono-mission metrics of the HY-2B were analyzed and compared with those of the Jason-2 and Jason-3 over the same periods of time. The results of both direct comparison and cross comparison methods were presented in this study. The comparison results indicated that the quality of the HY-2B satellite’s geophysical data records (GDRs) data was excellent, with 95% of the sea surfaces effectively observed between 82 degrees north and south latitudes. In addition, the standard deviation of the sea level anomalies (SLA) at the single mission crossovers was 4.6 cm to 5.8 cm, and at the dual-crossovers with Jason-3, the standard deviation was determined to be 5.1 cm to 5.8 cm. The accuracy levels of the significant wave heights and products of the HY-2B satellite radar altimeter were observed to be greater than 0.3 m and 1.4 m/s (STD), respectively. Therefore, it was concluded in this study that the data quality and system performance of the HY-2B satellite were excellent and stable, and could be widely utilized in such fields as global sea-level change monitoring, wave numerical assimilation predictions etc. View Full-Text
Keywords: HY-2B; altimeter; validation; sea surface height; significant wave height; wind speed HY-2B; altimeter; validation; sea surface height; significant wave height; wind speed
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MDPI and ACS Style

Jia, Y.; Yang, J.; Lin, M.; Zhang, Y.; Ma, C.; Fan, C. Global Assessments of the HY-2B Measurements and Cross-Calibrations with Jason-3. Remote Sens. 2020, 12, 2470. https://doi.org/10.3390/rs12152470

AMA Style

Jia Y, Yang J, Lin M, Zhang Y, Ma C, Fan C. Global Assessments of the HY-2B Measurements and Cross-Calibrations with Jason-3. Remote Sensing. 2020; 12(15):2470. https://doi.org/10.3390/rs12152470

Chicago/Turabian Style

Jia, Yongjun, Jungang Yang, Mingsen Lin, Youguang Zhang, Chaofei Ma, and Chenqing Fan. 2020. "Global Assessments of the HY-2B Measurements and Cross-Calibrations with Jason-3" Remote Sensing 12, no. 15: 2470. https://doi.org/10.3390/rs12152470

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