Performance Analysis of Chinese MEOLUT Prototype Based on Sino-Europe Cooperation in Galileo System
- Paper number
IAC-08.B2.2.11
- Author
Dr. Mo LIN, China Academy of Space Technology, China
- Coauthor
Prof. Jilin LI, China Academy of Space Technology (CAST), China
- Coauthor
Mr. Yongchao WANG, China Academy of Space Technology (CAST), China
- Coauthor
Mr. Shaobo LIU, China Academy of Space Technology (CAST), China
- Coauthor
Ms. Yunjie Zhang, China Academy of Space Technology (CAST), China
- Year
2008
- Abstract
As a part of Sino-Europe Cooperation in Galileo system, Search–and-Rescue (SAR) Forward Link Service End-to-End Validation (EEV) and implementation of MEOLUT(Medium Earth Orbit Local User terminal of SAR/Galileo) projects are the important components of Galileo system. The primary objectives of these projects are, with end-to-end campaign, to verify SAR/Galileo forward link service performance levels, to consolidate the design specifications and especially to predict the performance of Chinese MEOLUT Prototype. During proof-of-concept phase, a software-based simulation platform of Chinese MEOLUT Prototype was built to analysis the performance before Galileo IOV satellites being launched. It is coded by MATLAB for distress beacon signal simulation, link budget calculation, tracking strategy, signal reception, signal detection and processing algorithm, and beacon localization. 360 Proportionally distributed beacons are supposed to place on the surface of the earth. A 15-day operation with full Galileo Constellation is simulated, with Chinese MEOLUT Prototype located in Beijing, and a Frequency of Arrival (FOA)/Time of Arrival (TOA) estimation localization algorithm selected. The designed performance is 7 µs (1 σ) for TOA and 0.1Hz (1 σ) for FOA. Under optimized tracking strategy which optimize the coverage of MEOLUT prototype, the MEOLUT prototype in China will get a coverage area with radium of more than 5000km. Considering residual error, a conservative estimation for TOA and FOA can be better than 15 µs and 0.2Hz respectively, and under such condition the radium of MEOLUT coverage area will shrink to about 4000km. Far east, northwest-pacific region and even southeast Asia are under the coverage. Furthermore, a simulation is also done under the condition that the European MEOLUT prototype is located in Toulouse, France and a Chinese MEOLUT prototype is located in Beijing. Almost all the area of Asia and Europe lie in the coverage of these two MEOLUTs and even North Africa can be also covered by these two MEOLUTs service area. Humanitarian search and rescue will be achieved by the MEOLUT prototype being built in China.
- Abstract document
- Manuscript document
IAC-08.B2.2.11.pdf (🔒 authorized access only).
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