apositioningsystembasedoncommunicationsatellitesandthechineseareapositioningsystemcaps
文献类型：期刊论文
| 作者 | GuoXiang Ai2 ; HuLi Shi2; HaiTao Wu1; YiHua Yan2; YuJing Bian1; YongHui Hu1; ZhiGang Li1; Ji Guo1; XianDe Cai2
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| 刊名 | chinesejournalofastronomyandastrophysics
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| 出版日期 | 2008 |
| 卷号 | 8期号:6页码:611 |
| ISSN号 | 1009-9271 |
| 英文摘要 | The Chinese Area Positioning System (CAPS) is a positioning system based on satellite communication that is fundamentally different from the 3"G" (GPS, GLONASS and GALILEO) systems. The latter use special-purpose navigation satellites to broadcast navigation information generated on-board to users, while the CAPS transfers ground-generated navigation information to users via the communication satellite. In order to achieve accurate Positioning, Velocity and Time (PVT), the CAPS employs the following strategies to overcome the three main obstacles caused by using the communication satellite: (a) by real-time following-up frequency stabilization to achieve stable frequency; (b) by using a single carrier in the transponder with 36 MHz band-width to gain sufficient power; (c) by incorporating Decommissioned Geostationary Orbit communication satellite (DGEO), barometric pressure and Inclined Geostationary Orbit communication satellite (IGSO) to achieve the 3-D positioning. Furthermore, the abundant transponders available on DGEO can be used to realize the large capacity of communication as well as the integrated navigation and communication. With the communication functions incorporated, five new functions appear in the CAPS: (1) combination of navigation and communication; (2) combination of navigation and high accuracy orbit measurement; (3) combination of navigation message and wide/local area differential processing; (4) combination of the switching of satellites, frequencies and codes; and (5) combination of the navigation message and the barometric altimetry. The CAPS is thereby labelled a PVT5C system of high accuracy. In order to validate the working principle and the performance of the CAPS, a trial system was established in the course of two years at a cost of about 20 million dollars. The trial constellation consists of two GEO satellites located at E87.5 degrees and E110.5 degrees, two DGEOs located at E130 degrees and E142 degrees, as well as barometric altimetry as a virtual satellite. Static and dynamic performance tests were completed for the Eastern, the Western, the Northern, the Southern and the Middle regions of China. The evaluation results are as follows: (1) land static test, plane accuracy range: C/A code, 15 similar to 25 m; P code, 5 similar to 10 meters; altitude accuracy range, 1 similar to 3 m; (2) land dynamic test, plane accuracy range, C/A code, 15 similar to 25 m; P code, 8 similar to 10 m; (3) velocity accuracy, C/A code, 0.13 similar to 0.3 m s(-1), P code, 0.15 similar to 0.17 m s(-1); (4) timing accuracy, C/A code, 160 ns, P code, 13 ns; (5) timing compared accuracy of Two Way Satellite Time and Frequency Transfer (TWSTFT), average accuracy, 0.068 ns; (6) random error of the satellite ranging, 10.7 mm; (7) orbit determination accuracy, better than 2 m. The above stated random error is 1 sigma, error. At present, this system is used as a preliminary operational system and a complete system with 3 GEO, 3 DGEO and 3 IGSO is being established. |
| 资助项目 | [Ministry of science and Technology of China] ; [Chinese Academy of science] ; [National Natural Science Foundation of China] |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/47526]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.中国科学院 2.中国科学院国家天文台 |
| 推荐引用方式 GB/T 7714 | GuoXiang Ai,HuLi Shi,HaiTao Wu,et al. apositioningsystembasedoncommunicationsatellitesandthechineseareapositioningsystemcaps[J]. chinesejournalofastronomyandastrophysics,2008,8(6):611. |
| APA | GuoXiang Ai.,HuLi Shi.,HaiTao Wu.,YiHua Yan.,YuJing Bian.,...&XianDe Cai.(2008).apositioningsystembasedoncommunicationsatellitesandthechineseareapositioningsystemcaps.chinesejournalofastronomyandastrophysics,8(6),611. |
| MLA | GuoXiang Ai,et al."apositioningsystembasedoncommunicationsatellitesandthechineseareapositioningsystemcaps".chinesejournalofastronomyandastrophysics 8.6(2008):611. |
入库方式： OAI收割
来源：国家天文台
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