CAJ | 학술논문

作为中欧合作伽利略卫星导航项目的重要组成部分,伽利略搜救服务前向链路端到端验证项目是中国区伽利略合作项目中唯一一个系统级项目.项目的主要目的是通过端到端验证项目检验伽利略搜救服务前向链路的服务性能,确认设计技术指标和对本地用户终端地面系统模拟器FI,VE的性能预测.文章在此介绍了EEV系统组成和定位方法.在演示验证阶段,EEV项目组还设计了一个软件仿真平台用于在伽利略在轨测试卫星发射之前分析EEV系统性能.进行了由360个地球表面均匀分布的求救信标发射信号被全部伽利略卫星星座转发,时间跨度为15天的定位精度和覆盖范围分析.在FOA和TOA分别达到10tμs和0.1Hz的情况下,FLVE定位精度为5km的覆盖范围达到半径5 000km.FOA扣TOA在恶劣情况下为15μs和0.2Hz的情况下,覆盖范围缩减为4 000km,但还是达到了国际同类本地用户终端地面系统的先进水平.
작위중구합작가리략위성도항항목적중요조성부분,가리략수구복무전향련로단도단험증항목시중국구가리략합작항목중유일일개계통급항목.항목적주요목적시통과단도단험증항목검험가리략수구복무전향련로적복무성능,학인설계기술지표화대본지용호종단지면계통모의기FI,VE적성능예측.문장재차개소료EEV계통조성화정위방법.재연시험증계단,EEV항목조환설계료일개연건방진평태용우재가리략재궤측시위성발사지전분석EEV계통성능.진행료유360개지구표면균균분포적구구신표발사신호피전부가리략위성성좌전발,시간과도위15천적정위정도화복개범위분석.재FOA화TOA분별체도10tμs화0.1Hz적정황하,FLVE정위정도위5km적복개범위체도반경5 000km.FOA구TOA재악렬정황하위15μs화0.2Hz적정황하,복개범위축감위4 000km,단환시체도료국제동류본지용호종단지면계통적선진수평.
Search-And-Rescue (SAR) Forward lank Service End-to-End Validation (EEV) project is a significant part of the Galileo satellite navigation system. It is the only system-level project in Sino-European cooperation in the Galileo system. The objectives of these projects are, with end-to-end campaign, to verify SAR/Galileo forward link service performance levels, to con-solidate the design specifications and especially to predict the performance of FLVE, which is core simulator of the local user terminal ground system. EEV system configuration and distress bea-con positioning method are introduced in this paper. During the proof-of-concept phase, a soft-ware simulation platform of the EEV project was built to analyze the performance before Galileo IOV satellites being launched. 360 beacons are supposed to be proportionately distributed on the surface of the Earth. An analysis based on a 15-day operation with full Galileo constellation is performed, and a joint Frequency of Arrival and Time of Arrival positioning method is used. The FLVE can cover the area of radius of 5 000kin with 5km positioning accuracy based on 10μs (1σ) for TOA and 0.1Hz (1σ) for FOA, meanwhile coverage radius can be achieved to 4 000km based on 15μs and 0.2Hz for TOA/FOA respectively in worse case, which achieves the advanced level of international congener.