Global Assessments of the HY-2B Measurements and Cross-Calibrations with Jason-3
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, inclu...
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| Format: | Article |
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MDPI AG
2020-08-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/12/15/2470 |
| _version_ | 1797560603285389312 |
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| author | Yongjun Jia Jungang Yang Mingsen Lin Youguang Zhang Chaofei Ma Chenqing Fan |
| author_facet | Yongjun Jia Jungang Yang Mingsen Lin Youguang Zhang Chaofei Ma Chenqing Fan |
| author_sort | Yongjun Jia |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T18:02:04Z |
| format | Article |
| id | doaj.art-4d1a5c18010d4acba0f2a77f3dcd8837 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-10T18:02:04Z |
| publishDate | 2020-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-4d1a5c18010d4acba0f2a77f3dcd88372023-11-20T08:45:06ZengMDPI AGRemote Sensing2072-42922020-08-011215247010.3390/rs12152470Global Assessments of the HY-2B Measurements and Cross-Calibrations with Jason-3Yongjun Jia0Jungang Yang1Mingsen Lin2Youguang Zhang3Chaofei Ma4Chenqing Fan5National Satellite Ocean Application Service, Beijing 100081, ChinaFirst Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, ChinaNational Satellite Ocean Application Service, Beijing 100081, ChinaNational Satellite Ocean Application Service, Beijing 100081, ChinaNational Satellite Ocean Application Service, Beijing 100081, ChinaFirst Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, ChinaThe 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.https://www.mdpi.com/2072-4292/12/15/2470HY-2Baltimetervalidationsea surface heightsignificant wave heightwind speed |
| spellingShingle | Yongjun Jia Jungang Yang Mingsen Lin Youguang Zhang Chaofei Ma Chenqing Fan Global Assessments of the HY-2B Measurements and Cross-Calibrations with Jason-3 Remote Sensing HY-2B altimeter validation sea surface height significant wave height wind speed |
| title | Global Assessments of the HY-2B Measurements and Cross-Calibrations with Jason-3 |
| title_full | Global Assessments of the HY-2B Measurements and Cross-Calibrations with Jason-3 |
| title_fullStr | Global Assessments of the HY-2B Measurements and Cross-Calibrations with Jason-3 |
| title_full_unstemmed | Global Assessments of the HY-2B Measurements and Cross-Calibrations with Jason-3 |
| title_short | Global Assessments of the HY-2B Measurements and Cross-Calibrations with Jason-3 |
| title_sort | global assessments of the hy 2b measurements and cross calibrations with jason 3 |
| topic | HY-2B altimeter validation sea surface height significant wave height wind speed |
| url | https://www.mdpi.com/2072-4292/12/15/2470 |
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