Method and system based on big dipper short message precision track and clock correction broadcasting

A Beidou short message and precision orbit technology, applied in the field of Beidou short message precision orbit and clock difference broadcast, can solve the problem of poor broadcast ephemeris accuracy, achieve high-precision positioning effect, and improve the effect of poor accuracy

Inactive Publication Date: 2015-12-23
山东鼎成卫星导航定位技术有限公司
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a message, method and system based on the Be

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  • Method and system based on big dipper short message precision track and clock correction broadcasting
  • Method and system based on big dipper short message precision track and clock correction broadcasting
  • Method and system based on big dipper short message precision track and clock correction broadcasting

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Embodiment Construction

[0040] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0041] The invention first proposes a message broadcast based on the precise orbit and clock difference of the Beidou short message.

[0042] A message broadcast based on the precise orbit and clock difference of the Beidou short message, including a first message with orbit and clock difference information, a second message associated with the first message and having clock difference information, and a message related to the first message The third message is linked and has orbit and clock error information, and the orbit correction information is the coordinate correction number on the XYZ direction of the ground system XYZ according to the agreement generated by the difference between the satellite position of th...

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Abstract

The invention relates to a method and a system based on a big dipper short message precision track and clock correction broadcasting. The method comprises steps of performing difference processing on the positions of a satellite position of a precise ephemeris and a satellite position of a broadcasting ephemeris to generate coordinate correction in a protocol earth-fixing system XYZ direction, performing difference processing on the satellite clock difference of the precise ephemeris and the satellite clock difference of the broadcasting satellite, correspondingly converting the generated coordinate correction in the earth-fixing system XYZ direction to the radial direction, the tangential direction and the normal direction of the satellite, generating track correction information needed to be broadcasted, performing averaging processing on the generated clock difference correction to obtain an average value of the satellite difference correction, subtracting average value of the satellite clock difference correction from the satellite clock difference correction to obtain clock correction information to be broadcasted, and performing data encoding on the generated track correction information and obtained clock difference correction information to generate first information according to a first preset format. The invention improves the navigation positioning precision and greatly improves the shortcoming of poor precision of the broadcast ephemeris.

Description

technical field [0001] The invention relates to the broadcast field of orbit and clock difference in satellite navigation, in particular to a method and system for broadcasting precise orbit and clock difference based on Beidou short messages. Background technique [0002] At present, the real-time orbit and clock error of known navigation satellites are calculated by using the Kepler orbit parameters and orbit perturbation correction items obtained in the broadcast ephemeris, and the broadcast ephemeris can be directly extracted and used from satellite signals, compared with The ultra-fast and precise ephemeris that needs to be obtained online, the broadcast ephemeris is still the most widely used source of ephemeris in real-time and non-precision positioning, but the accuracy of the satellite orbit and clock error calculated through the broadcast ephemeris is not high, the satellite ephemeris Quality is the key to the positioning accuracy and reliability of satellite navig...

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Application Information

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IPC IPC(8): G01S19/27
CPCG01S19/27
Inventor 赵齐乐蒋科材周明志胡志刚李勇
Owner 山东鼎成卫星导航定位技术有限公司
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