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首页> 外文会议>Proceedings of the 54th annual meeting : Taking navigation to new heights >Operational Performances Of An Innovative European Navigation System (INES)
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Operational Performances Of An Innovative European Navigation System (INES)

机译：创新的欧洲导航系统（INES）的运行性能

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The GNSS Program has been initiated to create a global navigation system fulfilling all the needs of the civil aviation community. GNSS1 is already under implementation and consists in an integration between the existing systems (GPS, GLONASS) and a set of geostationary satellites broadcasting a navigation signal with integrity and wide area differential correction data. GNSS2 is intended to be a satellite navigation system controled by civilianrnorganisms, fulfilling in particular ICAO Navigation requirements, with the capability of being certified as a sole means system. GNSS2 will also apply to all kind of users, for transport applications (air, land, maritime) as well as for scientific applications.rnALCATEL is presently working on a new navigation satellite concept INES (Innovative European Navigation System) based on the utilization of a LEO constellation completed by the geostationary component of GNSS1. The objective of INES is to achieve users requirements by a progressive implementation : the SIS will provide a basic level of performance (at least equivalent to Civil Aviation NPA requirements with the objective of fulfilling CAT 1 accuracy) and more demanding applications will be reached thanks to ground augmentations and/or specific signal processing techniques. An Innovative aspect of INES is to propose a low cost system with low mass and consumption satellites. This is possible by the use of a localization ground network enabling on board real time orbit determination and synchronization.rnAfter a recall of the economical and strategical issues of the new navigation satellite system INES, a survey is made of the main requirements (accuracy, availability) for air transport organizations, which were first used to determine the system.rnBasic requirements such as precision accuracy performances will first be discussed by taking into account the UERE variation with the elevation of each satellite and the type of constellation. The UERE definition will depend on the propagation delays, ephemeris errors, receiver noise, clock error and multipath errors modeling.rnWe will then discuss the impact of the operational availability on the optimization of navigation constellations and particularly on LEO and GEO satellites constellations, by taking into account single and multiple satellite failures.rnOperational availability is particularly essential in the choice of the philosophy of redundancy at satellite level and at constellation level and has a great influence on design parameters such as the total number of satellites to produce over the lifetime of the system (nominal and spares satellites) and hence on the space segment definition and launch cost (satellite duration of life and reliability, production rate,..., launcher capability and availability, risk management...). Simulation results will be provided to illustrate the need for operational availability analysis.
机译：已启动GNSS计划，以创建一个满足民航界所有需求的全球导航系统。 GNSS1已经在实施中，它包括现有系统（GPS，GLONASS）与一组地球静止卫星之间的集成，该卫星广播具有完整性和广域差分校正数据的导航信号。 GNSS2旨在成为由平民有机体控制的卫星导航系统，特别满足国际民航组织的导航要求，并具有被认证为唯一手段系统的能力。 GNSS2也将适用于所有类型的用户，无论是运输应用（空中，陆地，海事）还是科学应用。rnALCATEL目前正在开发一种新的导航卫星概念INES（欧洲创新导航系统），其基础是利用LEO星座由GNSS1的地球静止部分完成。 INES的目标是通过逐步实施来满足用户要求：SIS将提供基本的性能水平（至少相当于民航NPA要求，以实现CAT 1精度为目标），并且由于地面增强和/或特定信号处理技术。 INES的一个创新方面是提出一种具有低质量和低消耗卫星的低成本系统。通过使用本地化地面网络可以实现机载实时轨道确定和同步，这是可能的。在回顾了新导航卫星系统INES的经济和战略问题之后，对主要要求进行了调查（准确性，可用性）。首先要确定系统的航空运输组织。首先将考虑UERE随卫星高度和星座类型的变化，讨论诸如精度，精度性能等基本要求。 UERE的定义将取决于传播延迟，星历误差，接收机噪声，时钟误差和多径误差建模。然后，我们将通过以下方法讨论可操作性对导航星座，尤其是对LEO和GEO卫星星座的优化的影响。考虑到单颗和多颗卫星的故障。在选择卫星级和星座级冗余原理时，运营可用性尤其重要，并且对设计参数（例如在卫星生命周期内要生产的卫星总数）有很大影响系统（标称和备用卫星），从而确定空间段和发射成本（卫星寿命和可靠性，生产率，...，发射器能力和可用性，风险管理...）。将提供仿真结果以说明对运营可用性分析的需求。

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