Rapid positioning method based on low-earth-orbit satellite multi-coverage scene

A low-orbit satellite and positioning method technology, applied in the field of low-orbit satellite system positioning and navigation, can solve the problems of low positioning accuracy, inability to real-time positioning, long observation time, etc., and achieve accurate results, shortened observation time, and reduced observation amount. Effect

Pending Publication Date: 2020-05-15
中国星网网络应用有限公司
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Problems solved by technology

However, the positioning accuracy of this method is not high, the observation time is long, and it cannot be positioned in real time.

Method used

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  • Rapid positioning method based on low-earth-orbit satellite multi-coverage scene
  • Rapid positioning method based on low-earth-orbit satellite multi-coverage scene
  • Rapid positioning method based on low-earth-orbit satellite multi-coverage scene

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Embodiment Construction

[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0058] refer to Figure 1-Figure 4 , a fast positioning method based on low-orbit satellite multiple coverage scenarios, including the following steps:

[0059] S1: The receiver simultaneously receives satellite broadcast signals 1 to N, analyzes the satellite number information, satellite position information, satellite speed information and beam position information and stores them locally;

[0060] S2: The receiver simultaneously receives the ranging signals sent by No. 1~N satellites, analyzes and obtains pseudo-range observation information and Doppler observation information and stores them locally;

[0061] S3: Determine the number N of satellites covered by ...

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Abstract

The invention discloses a rapid positioning method based on a low-orbit satellite multi-coverage scene, provides a real-time or quasi-real-time positioning technology for satellite multi-coverage scenes such as giant constellations, and adopts two steps of rough position estimation and accurate position determination to obtain the position of a receiver. The method comprises: firstly, estimating an initial rough position of a receiver based on multiple coverage characteristics, satellite beam position parameters, pseudo-range observation parameters and Doppler observation parameters; taking the estimated position as an input, carrying out Doppler positioning, and quickly obtaining the position of a receiver; under the condition that the satellite coverage multiple number is large, the pseudorange can be directly observed to carry out three-dimensional absolute positioning. According to the method, the satellite communication system can be completely independent of GNSS in the aspect ofposition acquisition, and is safer and more reliable.

Description

technical field [0001] The invention relates to the technical field of positioning and navigation of low-orbit satellite systems, in particular to a fast positioning method based on multiple coverage scenarios of low-orbit satellites. Background technique [0002] In recent years, with the vigorous development of domestic and foreign commercial aerospace industry, especially the research and construction of low-orbit satellite communication system has been valued by the aerospace field, a large number of companies and institutions engaged in the research, construction and operation of low-orbit satellite systems have sprung up Emerging, there are various plans for large, super large and even giant constellations. Traditional low-orbit satellite constellations have a small number of satellites. For example, the Iridium system has only a few areas, and single-satellite coverage is the mainstream. A constellation composed of thousands of satellites is bound to bring application...

Claims

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Application Information

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IPC IPC(8): G01S19/42
CPCG01S19/42
Inventor 杨波
Owner 中国星网网络应用有限公司
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