Improvement of Sea Surface Height Measurements of HY-2A Satellite Altimeter Using Jason-2 | |
Cui, Wei1,2; Wang, Wei1; Jie, Zhang2; Yang, Jungang2; Jia, Yongjun3 | |
刊名 | MARINE GEODESY |
2018-11-02 | |
卷号 | 41期号:6页码:632-648 |
关键词 | crossover analysis HY-2A satellite altimeter measurement accuracy sea surface height the orbit error correction |
ISSN号 | 0149-0419 |
DOI | 10.1080/01490419.2018.1529643 |
英文摘要 | HY-2A, which was launched on 16 August 2011, is the Chinese first microwave ocean dynamics environment satellite. Analyses of HY-2A daily sea-level anomaly data and HY-2A-Jason-2 (H-J) dual crossover sea-level anomaly differences show that HY-2A has measurement differences that mainly refer to an orbit error. H-J crossover differences and HY-2A-HY-2A (H-H) crossover differences give an estimate of the HY-2A orbit error. Smoothing cubic-spline functions are then used to obtain a continuous estimation of the HY-2A orbit error over time. On the basis of the simultaneous global minimization of H-J dual crossover differences and H-H crossover differences, the HY-2A observation error is efficiently reduced and height measurement data that are more precise are obtained. Specifically, the range bias/trend of the HY-2A altimeter is removed effectively and the root mean square of H-J crossover sea-level anomaly differences decrease from above 60 cm to 5.64 cm, and the standard deviation of H-J crossover differences decreases from 6.68 to 5.64 cm. Furthermore, the rms and standard deviations of H-H crossover differences both decrease from 7.46 to 6.55 cm. The results show that HY-2A after correction has a measurement accuracy and precision that are comparable to those of Jason-2. |
资助项目 | National Programme on Global Change and Air-Sea Interaction[GASI-02-PAC-YGST2-04] ; National Programme on Global Change and Air-Sea Interaction[GASI-02-SCS-YGST2-04] ; National Programme on Global Change and Air-Sea Interaction[GASI-02-IND-YGST2-04] |
WOS关键词 | CROSS-CALIBRATION ; ABSOLUTE CALIBRATION ; RADAR ALTIMETER ; TOPEX ; TOPEX/POSEIDON ; RECORD |
WOS研究方向 | Geochemistry & Geophysics ; Oceanography ; Remote Sensing |
语种 | 英语 |
出版者 | TAYLOR & FRANCIS INC |
WOS记录号 | WOS:000456827900005 |
内容类型 | 期刊论文 |
源URL | [http://ir.fio.com.cn:8080/handle/2SI8HI0U/26832] |
专题 | 自然资源部第一海洋研究所 |
通讯作者 | Yang, Jungang |
作者单位 | 1.Ocean Univ China, Qingdao Collaborat Innovat Ctr Marine Sci & Techn, Phys Oceanog Lab, Qingdao, Peoples R China 2.State Ocean Adm, Inst Oceanog 1, 6 Xianxialing Rd, Qingdao, Peoples R China 3.State Ocean Adm, Natl Satellite Ocean Applicat Serv, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Cui, Wei,Wang, Wei,Jie, Zhang,et al. Improvement of Sea Surface Height Measurements of HY-2A Satellite Altimeter Using Jason-2[J]. MARINE GEODESY,2018,41(6):632-648. |
APA | Cui, Wei,Wang, Wei,Jie, Zhang,Yang, Jungang,&Jia, Yongjun.(2018).Improvement of Sea Surface Height Measurements of HY-2A Satellite Altimeter Using Jason-2.MARINE GEODESY,41(6),632-648. |
MLA | Cui, Wei,et al."Improvement of Sea Surface Height Measurements of HY-2A Satellite Altimeter Using Jason-2".MARINE GEODESY 41.6(2018):632-648. |
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