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Satellite precise orbit determination method and device

A precision orbit determination and satellite technology, applied in the field of satellite navigation, can solve problems such as difficult real-time performance, long convergence time, and slow convergence time

Inactive Publication Date: 2019-03-26
SHANGHAI HAIJI INFORMATION TECH
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Problems solved by technology

[0007] On-board autonomous orbit determination relies on on-board GNSS receivers or inertial measurement units for orbit determination. Among them, the on-board autonomous orbit determination method based on GNSS observations can provide real-time autonomous and continuous satellite orbits. However, due to the influence of GNSS navigation satellites Influenced by the orbit error and clock error of the broadcast ephemeris, on-board autonomous orbit determination based on GNSS observations can usually only obtain orbit determination accuracy on the order of a few meters
In order to obtain high-precision orbit determination, satellite-based augmentation satellites are mainly distributed in GEO orbits, which are divided into wide-area differential integrity enhancement for civil aviation and other users and wide-area precision positioning enhancement for high-precision users such as surveying and mapping. However, the current wide-area precision positioning technology takes a long time to converge, and it is difficult to form a PNT application with high real-time requirements, so the problem of slow convergence time needs to be solved

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  • Satellite precise orbit determination method and device

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Embodiment Construction

[0070] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0071] The following describes the technical background of the embodiments of the present invention.

[0072] In 2015, the Boeing Company of the United States won a contract of about 160 million U.S. dollars from the U.S. military to further carry out research and application experiments on Iridium-based GPS navigation enhancement technology. To this end, a new research team was formed, and the main participant was changed to Satelles. The new low-orbit enhancement technology is based on the STL (Satelles Time and Location) service for GPS navigation enhancement newly set by the Iridium system. On the basis of iGPS, the enhancement function is further enhanced...

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Abstract

The embodiment of the invention discloses a satellite precise orbit determination method and device. The method comprises the steps that first observation data of a navigational satellite, determinedby a ground receiver and second observation data of the navigational satellite, determined by a low orbit satellite receiver are acquired; a first observation equation of the ground receiver and a second observation equation of the low orbit satellite receiver are determined; and the first observation equation and the second observation equation are solved according to the first observation data and the second observation data, and accordingly the orbital position of a navigational satellite is determined.

Description

technical field [0001] The invention relates to satellite navigation technology, in particular to a satellite precise orbit determination method and device. Background technique [0002] Satellite Navigation and Positioning System (GNSS) can provide real-time positioning services around the world, and has been widely used in many industries around the world. The current standard GNSS positioning technology accuracy is about 5-10 meters. For applications requiring higher precision, precision positioning methods are usually required. By receiving the navigation signal sent by the navigation satellite, the user uses the navigation satellite as a dynamic known point, and uses observation information such as pseudorange to measure the on-flight position and speed of the moving carrier in real time, and then complete the navigation. [0003] Obtaining accurate satellite orbits in real time is a key technology to realize precise satellite navigation and positioning. At present, ...

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Application Information

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IPC IPC(8): G01C21/24G01S19/44G01S19/42
CPCG01C21/24G01S19/425G01S19/428G01S19/44
Inventor 刘欢
Owner SHANGHAI HAIJI INFORMATION TECH
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