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

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...

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Bibliographic Details
Published in:Satellite navigation 2024-12, Vol.5 (1), p.11-9, Article 11
Main Authors: Yang, Yuanxi, Mao, Yue, Ren, Xia, Jia, Xiaolin, Sun, Bijiao
Format: Article
Language:English
Subjects:
Accuracy
Accuracy augmentation
Aviation
Engineering
Geometry
Integrity
Kinematics
Low earth orbit navigation constellation
Low earth orbit satellites
Navigation systems
Orbit determination
Original Article
Regions
Remote sensing
Satellite communications
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Summary: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.
ISSN:2662-9291
2662-1363
DOI:10.1186/s43020-024-00133-w