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Orbit determination method, device and system of low-orbit satellite

A low-orbit satellite and orbit determination technology, applied in the field of satellite communications, can solve problems such as difficulty in meeting industry development needs

Active Publication Date: 2019-07-26
BEIJING UNISTRONG SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, the existing satellite orbit determination methods are difficult to meet the needs of industry development

Method used

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  • Orbit determination method, device and system of low-orbit satellite
  • Orbit determination method, device and system of low-orbit satellite
  • Orbit determination method, device and system of low-orbit satellite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] see figure 2 , which is a flow chart of a low-orbit satellite orbit determination method provided by the embodiment of the present application, such as figure 2 As shown, the method is applied to the ground system, the method may include:

[0107] S201: Obtain observation data and broadcast ephemeris of navigation satellites.

[0108] In this embodiment, the ground system can acquire GNSS observation data and broadcast ephemeris in real time through global GNSS tracking stations. In actual implementation, each GNSS tracking station can be equipped with a GNSS receiver to obtain GNSS observation data and broadcast ephemeris through the GNSS receiver. Among them, the GNSS observation data is obtained by the ground system by analyzing the satellite signals sent by the navigation satellites.

[0109] Wherein, the observation data may include carrier phase observation values, pseudorange observation values ​​and other information. Among them, the carrier phase observat...

Embodiment 2

[0118] The realization of the orbit correction number and clock error correction number of the navigation satellite calculated and obtained by the ground system will be described below with reference to the accompanying drawings.

[0119] see image 3 , which is a flow chart of a method for obtaining orbit corrections and clock corrections provided by an embodiment of the present application, such as image 3 As shown, the method is applied to the ground system, the method may include:

[0120] S301: Obtain the real-time precise orbit of the navigation satellite according to the position, observation data and broadcast ephemeris of the ground system.

[0121] In this embodiment, after the ground system receives the GNSS observation data and the broadcast ephemeris, it uses the position of the ground system, the observation data and the broadcast ephemeris to calculate and obtain the real-time precise orbit of the navigation satellite.

[0122] In the actual implementation, f...

Embodiment 3

[0138] The above-mentioned embodiment introduces the acquisition of correction information, and the method for determining the orbit of a low-orbit satellite provided by the embodiment of the present application by using the correction information will be described below with reference to the accompanying drawings.

[0139] see Figure 4 , which is a flow chart of a low-orbit satellite orbit determination method provided by the embodiment of the present application, such as Figure 4 As shown, the method is applied to low-orbit satellites, and the method may include:

[0140] S401: Obtain broadcast ephemeris and observation data of navigation satellites.

[0141] S402: Obtain positioning information according to the broadcast ephemeris, and correct the positioning information based on the correction information of the positioning information acquired and sent by the ground system.

[0142] In this embodiment, the low-orbit satellite can receive the broadcast ephemeris sent b...

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Abstract

The embodiments of the invention disclose an orbit determination method, device and system of a low-orbit satellite. Firstly, broadcast ephemeris sent by a navigation satellite is received, and the orbit and clock difference of the navigation satellite are calculated and obtained according to the broadcast ephemeris. Then, the correction information of the positioning information sent by a groundsystem is received to correct the positioning information, and the corrected positioning information is obtained. Then the revised positioning information and observation data are used for determiningthe orbit of the low-orbit satellite. That is, the embodiments of the invention introduce the correction information of the positioning information, and the accurate corrected positioning informationis used for determining the orbit the low-orbit satellite, so that the orbit determination accuracy of the low-orbit satellite is improved.

Description

technical field [0001] The present application relates to the technical field of satellite communication, in particular to a method, device and system for determining the orbit of a low-orbit satellite. Background technique [0002] With the continuous development of Global Navigation Satellite System (GNSS) technology, its global, high-precision and low-cost characteristics make GNSS measurement technology gradually become the main technical means of low-orbit satellite positioning. The low-orbit satellites are equipped with GNSS receivers to obtain real-time GNSS observation data and broadcast ephemeris sent by GNSS satellites. The GNSS observation data include pseudorange observations and carrier phase observations. In the actual orbit determination, first use the broadcast ephemeris to determine the position and clock error of the navigation satellite, and then determine the position of the LEO satellite according to the position, clock error and observation data of the ...

Claims

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Application Information

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IPC IPC(8): G01S19/46G01S19/40
CPCG01S19/46G01S19/40
Inventor 王军
Owner BEIJING UNISTRONG SCI & TECH
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