System architecture of low-orbit navigation enhancement system

Abstract

The invention discloses a system architecture of a low-orbit navigation enhancement system, which comprises a low-orbit satellite constellation, a ground operation control system and a user side. The ground operation control system comprises a main control station and a monitoring station; a low-orbit satellite-borne GNSS receiver receives a GNSS navigation signal and modulates observation data into a low-orbit navigation signal; the monitoring station which receives a low-orbit navigation signal to obtain the observed quantity of the ground to a low-orbit satellite and demodulates a navigation message to obtain the satellite-borne GNSS observed quantity, and the master control station estimates an orbit and a star clock of the low-orbit satellite by using the satellite-borne and ground observed quantity, arranges a precise ephemeris into a message according to a specific format, and uploads the message to the Internet; and the user side obtains the precise ephemeris through the mobile communication network, and finally high-precision positioning is completed. According to the system architecture provided by the invention, a satellite-ground communication link does not need to be established between the low-orbit satellite and the ground operation and control system, so that the implementation complexity of the satellite load is greatly simplified, and the construction cost of the ground operation and control system is reduced.

Description

technical field [0001] The present invention relates to the technical field of satellite navigation, and more specifically, relates to an architecture of a low-orbit navigation augmentation system. Background technique [0002] The traditional architecture of the low-orbit navigation augmentation system consists of the following five parts: 1. Low-orbit satellites: receive GNSS navigation signals, and transmit observation data to ground monitoring stations through satellite downlink communication links; at the same time receive ground injection stations The uploaded message data is modulated into the low-orbit navigation signal and then broadcast to the ground; multiple low-orbit satellites distributed in multiple orbital planes form a low-orbit navigation constellation to achieve multiple coverage of the world or specific areas; 2. Monitoring stations : Receive GNSS navigation satellites and low-orbit navigation signals, and transmit observation data to the main control sta...

AI Technical Summary

Problems solved by technology

However, due to the large number of low-orbit constellation satellites, the fast movement speed, and the short visible arc, in order to establish and maintain a continuous and stable satellite-ground communication link, high system construction costs and a large amount of satellite-ground communication resources are required, which directly restricts low-orbit satellites. Construction and promotion of orbital navigation augmentation system

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