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Method for calculating GPS satellite position through broadcast ephemeris

A technology of broadcasting ephemeris and satellite positions, applied in the field of navigation and positioning, can solve problems such as occupying large memory and affecting calculation speed, and achieve the effect of improving accuracy and real-time performance

Inactive Publication Date: 2016-09-14
SUZHOU MING CROWN SOFTWARE TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

In GPS positioning, the coordinates of satellites need to be calculated multiple times, and each calculation of satellite coordinates requires a large amount of memory, which affects the calculation speed

Method used

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  • Method for calculating GPS satellite position through broadcast ephemeris
  • Method for calculating GPS satellite position through broadcast ephemeris
  • Method for calculating GPS satellite position through broadcast ephemeris

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Embodiment Construction

[0026] A kind of method utilizing broadcast ephemeris to calculate GPS satellite position, comprises the steps:

[0027] Step 1: Calculate the coordinates of the satellite in the Cartesian coordinate system of the orbital plane;

[0028] 1a: Calculate the average angular velocity n of satellite motion, according to Kepler's third law, using the square root of the major semi-axis given in the broadcast ephemeris Calculate the average angular velocity n of TOE at the reference moment 0 , according to the perturbation parameter Δn given in the broadcast ephemeris, get n=n 0 +Δn;

[0029] 1b: Get the naturalized time t according to the GNSS time system k ;

[0030] 1c: Calculate the mean anomaly angle M of the satellite at the moment of observation k ,M k = M 0 +nt k ,M 0 the mean anomaly angle for the reference instant given for the broadcast ephemeris;

[0031] 1d: Calculate the apex angle E k ,E k = M k +esinE k , where e is the eccentricity of the satellite orbi...

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Abstract

The invention discloses a method for calculating the GPS satellite position through a broadcast ephemeris. Step one: the coordinates of a satellite under an orbital plane rectangular coordinate system are calculated; and step two: the spatial rectangular coordinates of the satellite in an earth-fixed coordinate system are calculated. According to the method for calculating the GPS satellite position through the broadcast ephemeris, the algorithm has great improvement in the aspect of the precision of calculating the satellite position through the GPS broadcast ephemeris so that a great premise is provided for high-precision positioning and navigation and other application, and the accuracy and the real-time performance of GPS satellite orbit calculation can be enhanced.

Description

technical field [0001] The invention relates to a method for calculating GPS satellite positions by using broadcast ephemeris, belonging to the technical field of navigation and positioning. Background technique [0002] GPS was developed by the United States in the 1970s and was fully completed in 1994. It is a new generation of satellite navigation and positioning system capable of all-round real-time three-dimensional navigation and positioning in sea, land and air. Especially after recent years of research, GPS has new applications in surveying and mapping, aerial remote sensing and meteorology, and has won the trust of users with its outstanding features such as all-weather, high precision, automation, and high efficiency. With the continuous improvement of positioning accuracy requirements, people put forward higher and higher requirements for the accuracy and real-time performance of GPS satellite ephemeris. The ephemeris of a satellite is information describing the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/37
CPCG01S19/37
Inventor 阳媛夏钢夏泽宇
Owner SUZHOU MING CROWN SOFTWARE TECH CO LTD