Demand and key technology for a LEO constellation as augmentation of satellite navigation systems

IF 9 1区地球科学 Q1 ENGINEERING, AEROSPACE

Satellite Navigation Pub Date : 2024-04-29 DOI:10.1186/s43020-024-00133-w

Yuanxi Yang, Yue Mao, Xia Ren, Xiaolin Jia, Bijiao Sun

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引用次数: 0

Abstract

A Low Earth Orbit (LEO) constellation augmenting satellite navigation is important in the future development of Global Navigation Satellite System (GNSS). GNSS augmented by LEO constellations can improve not only the accuracy of Positioning, Navigation, and Timing (PNT), but also the consistency and reliability of secure PNT system. This paper mainly analyzes the diverse demands of different PNT users for LEO augmented GNSS, including the precision demand in real-time, the availability demand in special areas, the navigation signal enhancement demand in complex electromagnetic environments, and the integrity demand with high security. Correspondingly, the possible contributions of LEO constellations to PNT performance are analyzed from multiple aspects. A particular attention is paid to the special PNT user requirements that cannot be fulfilled with existing GNSS, such as the PNT service demand in the polar regions and the onboard GNSS orbit determination demand of some LEO satellites. The key technologies to be considered in the constellation design, function realization, and payload development of the LEO-augmented navigation system are summarized.

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低地轨道星座作为卫星导航系统增强系统的需求和关键技术

低地轨道（LEO）星座增强卫星导航对全球导航卫星系统（GNSS）的未来发展非常重要。低地轨道星座增强的全球导航卫星系统不仅能提高定位、导航和授时（PNT）的精度，还能提高安全 PNT 系统的一致性和可靠性。本文主要分析了不同 PNT 用户对低地轨道增强型 GNSS 的不同需求，包括实时的精度需求、特殊区域的可用性需求、复杂电磁环境下的导航信号增强需求以及高安全性的完整性需求。相应地，从多个方面分析了低地轨道星座对 PNT 性能的可能贡献。特别关注现有全球导航卫星系统无法满足的特殊 PNT 用户需求，如极地地区的 PNT 服务需求和一些低地轨道卫星的星载全球导航卫星系统轨道确定需求。总结了在低地轨道增强导航系统的星座设计、功能实现和有效载荷开发方面需要考虑的关键技术。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Satellite Navigation Multiple-

CiteScore

19.40

自引率

6.20%

发文量

审稿时长

12 weeks

期刊介绍： Satellite Navigation is dedicated to presenting innovative ideas, new findings, and advancements in the theoretical techniques and applications of satellite navigation. The journal actively invites original articles, reviews, and commentaries to contribute to the exploration and dissemination of knowledge in this field.