Method and system for broadcasting real-time orbital clock difference products based on multi-source data fusion
A multi-source data and data fusion technology, applied in the field of navigation and positioning, can solve the problems of reducing wide-area precise single-point positioning, enhancing service stability and availability, and the orbital clock error data of the user terminal cannot be strictly synchronized, and positioning calculation cannot be completed. , to achieve the effect of ensuring stability and availability, solving data interruption, and improving accuracy
Active Publication Date: 2019-11-19
羲和时空(武汉)网络科技有限公司
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[0004] However, in the actual calculation process, due to data transmission delays, interruptions, etc., the orbital clock data of the user terminal and a single satellite data center cannot be strictly synchronized, resulting in delays in the calculation of the user terminal or failure to complete the positioning calculation, reducing the Wide-area precise point positioning enhances service stability and availability
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[0041] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0042] see figure 1 As shown, the embodiment of the present invention provides a method for broadcasting real-time orbital clock difference products based on multi-source data fusion, which is used to fuse and process the real-time orbital clock difference product data of multiple data sources, thereby reducing the wide-area real-time orbital clock difference product data. The broadcast delay of poor products is avoided to avoid data interruption. A method for broadcasting real-time orbital clock difference products based on multi-source data fusion of the present invention specifically includes:
[0043] S1: Receive the orbital clock difference product data sent by each satellite data center. The orbital clock difference product data specifically includes satellite orbit data and product clock difference data. Preferably, the reception of th...
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The invention discloses a method and a system for broadcasting a real-time orbital clock difference product based on multi-source data fusion, and relates to the field of navigation and positioning. The method includes steps that orbital clock difference product data sent by each satellite data center is received; the received orbital clock difference product data is subjected to time synchronization; data fusion of the time-synchronized orbital clock difference product data is processed by a data fusion algorithm with additional quasi-steady reference to obtain the fused orbital clock difference product data; the fused orbital clock difference product data is broadcasted to the user terminal; and the user terminal receives the fused orbital clock difference product data and performs real-time wide-area precise single-point positioning to complete the positioning solution. The method and the system can effectively improve the stability and usability of the data broadcasting of the clock difference product.
Description
technical field [0001] The invention relates to the field of navigation and positioning, in particular to a method and system for broadcasting real-time orbital clock difference products based on multi-source data fusion. Background technique [0002] The real-time precise point positioning technology is a technology that uses the fast and precise ephemeris and satellite clock error obtained in real time, combined with the dual-frequency carrier phase observations of the receiver, to construct a real-time precise point positioning non-difference model for high-precision positioning. [0003] In general, the calculation of fast and precise ephemeris and satellite clock error is usually carried out using a "two-step method", that is, firstly use the precise orbit determination technology to generate ultra-fast and precise orbit products and earth rotation parameter products, etc., and then fix the satellite orbit, the earth Rotation parameters, station coordinates and other pa...
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IPC IPC(8): G01S19/42
CPCG01S19/42
Inventor何冰姚卓刘心龙宋伟伟
Owner羲和时空(武汉)网络科技有限公司