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首页> 外文期刊>Journal of Spacecraft and Rockets >New Navigation Satellite System Based on Intermediate Circular Orbits
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New Navigation Satellite System Based on Intermediate Circular Orbits

机译：基于中间圆轨道的新型导航卫星系统

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In the framework of the Global Navigation Satellite System, European industries are identifying and studying new satellite constellations able to cope with required navigation performance for terrestrial, maritime, air, and space users. Alenia Aerospazio has identified many new satellite constellations. (Some of them are constituted by low Earth orbits or intermediate circular orbits for global coverage; others consider satellites in high elliptical orbits or geosynchronous orbits for regional coverage.) All of them have been compared in terms of navigation performance, e.g., accuracy, availability, continuity, and integrity. The best one is a constellation of 27 satellites located in intermediate circular orbits at a common altitude of 10,389 km and a common inclination of 57 deg. This constellation has been identified by the Walker method to find a space system able to guarantee a global and continuous coverage with low positioning dilution of precision values (always less than 4) and with a coverage level equal to 6, i.e., from each point of the Earth surface it is always possible to see at least six of the satellites. After both the payload design and the budget have been identified and analyzed, the satellite platform has been designed, obtaining, in this way, mass, power, and propellant budgets. The launch strategy and the orbit acquisition phase have been defined.
机译：在全球导航卫星系统的框架内，欧洲工业界正在识别和研究能够满足陆，海，空，空用户需求的导航性能的新卫星星座。 Alenia Aerospazio已经确定了许多新的卫星星座。 （其中一些由低地球轨道或中间圆形轨道构成，以进行全球覆盖；另一些则将高椭圆轨道或地球同步轨道中的卫星作为区域覆盖。）对它们的导航性能进行了比较，例如准确性，可用性，连续性和完整性。最好的一个是由27个卫星组成的星座，它们位于中间的圆形轨道上，共同的高度为10389 km，共同的倾角为57度。该星座已通过Walker方法进行了识别，以找到一种空间系统，该空间系统能够以较低的精度值定位稀释（始终小于4）并且覆盖级别等于6，即从每个点开始，确保全局连续覆盖在地球表面，总是可以看到至少六颗卫星。在确定并分析了有效载荷设计和预算之后，就设计了卫星平台，从而获得了质量，功率和推进剂预算。已经确定了发射策略和轨道获取阶段。

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