Beidou short message technology based multi-mode and multi-frequency maritime precisely positioning method

A Beidou short message, multi-mode and multi-frequency technology, applied in the field of multi-mode and multi-frequency maritime precision positioning based on Beidou short message technology

Active Publication Date: 2017-02-01
上海达华测绘科技有限公司
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Problems solved by technology

At present, the research on using the Beidou satellite short message to transmit tide level and ship information has been completed, and the research on using the Beidou satellite system to transmit the Beidou satellite measurement and positioning, accurate satellite orbit parameters, clock difference, UDP, etc., is rare at home and abroad. There are reports

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  • Beidou short message technology based multi-mode and multi-frequency maritime precisely positioning method
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  • Beidou short message technology based multi-mode and multi-frequency maritime precisely positioning method

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Embodiment Construction

[0096] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0097] Development of shore-based GPS / Beidou orbit clock difference software service platform

[0098] Main functions: Calculate the precise orbit and precise clock error of GPS / Beidou satellites in orbit, and model and forecast the precise orbit and precise clock error, etc., to provide high-precision real-time orbital clock error correction parameters for Beidou terminals for observation.

[0099] Collect and use the Beidou observation data of several IGS tracking stations around the world (available online for free) to calculate the Beidou satellite's precise orbit, precise clock error and other related parameters (such as the earth's rotation parameters), and use Beidou to send the relevant correction parameters calculated by t...

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Abstract

The invention provides a Beidou short message technology based multi-mode and multi-frequency maritime precisely positioning method which comprises the following steps: first, using an automatically downloaded and updated IGU ultra-fast track to solve the track correction information, the clock correction information and the atmospheric correction information; second, conducting real-time RTCM data stream decoding; and accessed by data stream, using the IF model and the MW model respectively to calculate the correction information of the observation value and the wide-lane ambiguity information; carrying out reasonable transformation to the solved correction information; extracting the effective fractional part of the information for decoding and using the Beidou short message technology to broadcast it to a user. And while a mobile station receives real time data streams, it receives the Beidou short message data and decodes the data for the recovery of effective correction information. According to the invention, the IF model and MW model are used to seek the real-time dynamic position of a mobile station through the PPP technology; and the method attempts to achieve fixed ambiguity so as to provide the user with high-precision positioning. Compared with the prior art, the method of invention is highly precise and stable. The method can also be applied widely and practically.

Description

technical field [0001] The invention relates to a positioning technology for satellite navigation, in particular to a multi-mode and multi-frequency marine precision positioning method based on the Beidou short message technology. Background technique [0002] At present, my country's surveying and mapping, land, urban construction, planning, water conservancy and other industries, as well as some major national construction projects, require centimeter-level or even higher precise positioning. More than 90% of them use GPS base station differential positioning technology. Once GPS stops serving, these industries and projects will fall into chaos or come to a standstill. Especially in times of war, if there is no independent positioning system, the consequences will be unimaginable; as China's independently developed and independently operated Beidou navigation satellite system begins to cover the Asia-Pacific region, Beidou's application is becoming more and more extensive....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/42
CPCG01S19/42
Inventor 刘宏李博峰石峰臧楠陆亚英张芙盛焦永强
Owner 上海达华测绘科技有限公司
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