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| Ground-based GNSS VTEC constrained ionospheric correction method for atmospheric occultation | |
| Alternative Title | WOS:000595589000004 |
| Liu CongLiang1,2,3; Sun YueQiang1,2,3; Du QiFei1,2,3; Bai WeiHua1,2,3; Wang XianYi1,2,3; Li Wei1,2 | |
| Source Publication | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 2020 | |
| Volume | 63Issue:12Pages:4324-4332 |
| DOI | 10.6038/cjg2020O0147 |
| ISSN | 0001-5733 |
| Language | 中文 |
| Keyword | GNSS atmospheric radio occultation Bending angle Ionospheric error Ground-based GNSS VTEC GPS RADIO OCCULTATION ERRORS VALIDATION CHAMP MODEL GNOS |
| Abstract | Ionosphere is a major error source of Global Navigation Satellite System (GNSS) radio occultation (RO), this paper proposed a ground-based GNSS vertical total electron content (VTEC) constrained ionospheric error correction method, which accounts for the ionospheric asymmetry along the occultation ray path as well as the first- and second-order ionospheric terms. It combines the ground-based GNSS VTEC horizontal change information and the ionospheric model vertical change information to estimate the electron density along the occultation ray path, then calculates the bending angle first- and second-order ionospheric error profiles under the assumption of bilateral local spherical symmetry along the inbound side and outbound side rays. The GNSS RO bending angle first- and second-order ionospheric error profiles was calculated using MetOp-A and GRACE missions observation data and international GNSS service (IGS) GNSS VTEC data from a low solar activity day (i. e. , July 15, 2008) and a high solar activity day (i. e. , July 15, 2013). The comparative analysis shows that the empirical model consistent with the theoretical model in terms of the second-order Residual Ionospheric Error (RIE) and with the observation data in terms of the first- and second-order bending angle ionospheric errors. Therefore, this method can be used for those RO events with low quality L2 observations and even loss of L2 signal, to correct the first- and second-order ionospheric errors to improve the bending angle accuracy and the RO observations utilization. |
| Indexed By | SCI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.nssc.ac.cn/handle/122/7555 |
| Collection | 中国科学院国家空间科学中心 |
| Affiliation | 1.Chinese Acad Sci, Natl Space Sci Ctr, Beijing 100190, Peoples R China 2.Beijing Key Lab Space Environm Explorat, Beijing 100190, Peoples R China 3.Joint Lab Occultat Atmosphere & Climate JLOAC, Beijing, Peoples R China 4.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Liu CongLiang,Sun YueQiang,Du QiFei,et al. Ground-based GNSS VTEC constrained ionospheric correction method for atmospheric occultation[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2020,63(12):4324-4332. |
| APA | Liu CongLiang,Sun YueQiang,Du QiFei,Bai WeiHua,Wang XianYi,&Li Wei.(2020).Ground-based GNSS VTEC constrained ionospheric correction method for atmospheric occultation.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,63(12),4324-4332. |
| MLA | Liu CongLiang,et al."Ground-based GNSS VTEC constrained ionospheric correction method for atmospheric occultation".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 63.12(2020):4324-4332. |
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