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Featured services and performance of BDS-3.
- Source :
-
Science bulletin [Sci Bull (Beijing)] 2021 Oct 30; Vol. 66 (20), pp. 2135-2143. Date of Electronic Publication: 2021 Jun 13. - Publication Year :
- 2021
-
Abstract
- BeiDou Global Navigation Satellite System (BDS-3) not only performs the normal positioning, navigation and timing (PNT) functions, but also provides featured services, which are divided into geostationary orbit (GEO) and medium earth orbit (MEO) satellite-based featured services in this paper. The former refers to regional services consisting of the regional short message communication service (RSMCS), the radio determination satellite service (RDSS), the BDS satellite-based augmented service (BDSBAS) and the satellite-based precise point positioning service via B2b signal (B2b-PPP). The latter refers to global services consisting of the global short message communication service (GSMCS) and the MEO satellite-based search and rescue (MEOSAR) service. The focus of this paper is to describe these featured services and evaluate their performances. The results show that the inter-satellite link (ISL) contributes a lot to the accuracy improvement of orbit determination and time synchronization for the whole constellation. Compared with some other final products, the root mean squares (RMS) of the BDS-3 precise orbits and broadcast clock are 25.1 cm and 2.01 ns, respectively. The positioning accuracy of single frequency is better than 6 m, and that of the generalized RDSS is usually better than 12 m. For featured services, the success rates of RSMCS and GSMCS are better than 99.9% and 95.6%, respectively; the positioning accuracies of single and dual frequency BDSBAS are better than 3 and 2 m, respectively; the positioning accuracy of B2b-PPP is better than 0.6 m, and the convergence time is usually smaller than 30 min; the single station test shows that the success rate of MEOSAR is better than 99%. Due to the ISL realization in the BDS-3 constellation, the performance and capacities of the global featured services are improved significantly.<br />Competing Interests: Conflict of interest The authors declare that they have no conflict of interest.<br /> (Copyright © 2021 Science China Press. Published by Elsevier B.V. All rights reserved.)
- Subjects :
- Communication
Earth, Planet
Subjects
Details
- Language :
- English
- ISSN :
- 2095-9281
- Volume :
- 66
- Issue :
- 20
- Database :
- MEDLINE
- Journal :
- Science bulletin
- Publication Type :
- Academic Journal
- Accession number :
- 36654271
- Full Text :
- https://doi.org/10.1016/j.scib.2021.06.013