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Method, device and system for orbit determination of low-orbit satellites

A low-orbit satellite and orbit determination technology, applied in the field of satellite communications, can solve problems such as difficult to meet the development needs of the industry, and achieve the effect of improving the accuracy of orbit determination

Active Publication Date: 2022-03-15
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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  • Method, device and system for orbit determination of low-orbit satellites
  • Method, device and system for orbit determination of low-orbit satellites
  • Method, device and system for orbit determination of low-orbit satellites

Examples

Experimental program
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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 embodiment of the present application discloses a method and device for determining the orbit of a low-orbit satellite. Firstly, the broadcast ephemeris sent by the navigation satellite is received, and the orbit and clock error of the navigation satellite are calculated according to the broadcast ephemeris. Then, the correction information of the positioning information sent by the ground system is received, so as to correct the positioning information, and obtain the corrected positioning information. Then use the corrected positioning information and observation data to determine the orbit of the low-orbit satellite. That is, the embodiment of the present application introduces the correction information of the positioning information, and uses the accurate corrected positioning information to determine the orbit of the low-orbit satellite, thereby improving the accuracy of the orbit determination of the low-orbit satellite.

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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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/46G01S19/40
CPCG01S19/46G01S19/40
Inventor 王军
Owner BEIJING UNISTRONG SCI & TECH
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