High-precision inter-satellite laser ranging assistant precise point positioning method

A technology of precise single-point positioning and laser ranging, which is applied in the field of satellite navigation, can solve the problems of increasing the cost of using PPP technology, achieve the effect of reducing positioning initialization time, reducing update frequency requirements, and improving positioning efficiency

Active Publication Date: 2019-07-19
中国人民解放军61540部队
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AI Technical Summary

Problems solved by technology

Since the satellite orbit and clock error prediction accuracy is directly related to the forecast duration, in order to meet the positioning accuracy requirements, PPP users need to receive precise orbit and clock error products at high frequency, resulting in an increase in the use cost of PPP technology

Method used

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  • High-precision inter-satellite laser ranging assistant precise point positioning method
  • High-precision inter-satellite laser ranging assistant precise point positioning method
  • High-precision inter-satellite laser ranging assistant precise point positioning method

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0029] The navigation satellite of the present invention is equipped with a high-precision inter-satellite laser ranging load, and can obtain two-way precise ranging observations between satellites; the ground operation and control system can determine the starting point of sending and receiving signals of satellite laser ranging equipment and the L-band satellite through comprehensive data processing. The system deviation parameters between the payload antenna phase centers are uploaded to the satellite; the satellite arranges the inter-satellite ranging information and system deviation information into the transmitted signal; the ground single-point positioning user receives the L-band navigation signal while receiving the inter-satellite laser measurement Distance informa...

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Abstract

The invention provides a high-precision inter-satellite laser ranging assistant precise point positioning method. According to the method, a navigation satellite carries a high-precision inter-satellite laser ranging load; a ground operation control system determines a system deviation parameter between a signal receiving and transmitting starting point of satellite laser ranging equipment and a phase center of an L-waveband satellite load antenna and uploads the system deviation parameter to the satellite; the satellite arranges inter-satellite ranging information and system deviation information into a transmitting sign; a ground point positioning user receives the inter-satellite laser ranging information and the system deviation information while receiving an L-waveband navigation signal; and an inter-satellite laser ranging observed quantity, an L-waveband pseudo-range, a carrier phase observed quantity, a navigation message, a precise orbit product and other data are utilized ina combined mode to complete precise point positioning, so that the precise position of the user is determined. Through the method, positioning initialization time can be shortened, the requirement onprecise clock correction and orbit product update frequency is lowered, and kinematic precise point positioning efficiency is improved.

Description

technical field [0001] The invention relates to the field of satellite navigation, in particular to a method for realizing user precise single-point positioning by combining inter-satellite two-way laser ranging observations with L-band pseudo-range and carrier phase observation data. Background technique [0002] Satellite navigation system is the most widely used navigation, positioning and timing system at this stage. Precise point positioning technology is a kind of satellite precise orbit and clock error products solved by the global GNSS data processing center, and the non-integer ambiguity parameters (FCB) of the satellites solved by post-processing. It is a method to accurately determine the user's position based on frequency pseudo-range and carrier phase observation data. The precise single-point positioning method can realize centimeter-level positioning only by using the observation data of a single station, and achieve a precise positioning effect close to that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/45G01S17/08
CPCG01S19/45G01S17/08
Inventor 宋小勇毛悦贾小林阮仁桂冯来平姬剑锋
Owner 中国人民解放军61540部队
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