Composite navigation message

A composite navigation and telegram technology, applied in the space field, can solve problems such as affecting the output rate of navigation and positioning solutions, affecting code capture, and lengthy telegrams, etc., and achieves the effect of improving the accuracy of elevation measurement, the accuracy of navigation and positioning, and the transmission rate.

Inactive Publication Date: 2007-12-12
NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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Problems solved by technology

[0011] The above is the navigation message in the global positioning system (GPS) satellite navigation. It can be seen that the information it can transmit is limited. If the message is lengthened, although the amount of information can be increased, the length of the message will affect the capture of the code and affect the navigation and positioning solution. output rate

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Embodiment Construction

[0040] The present invention has invented a composite navigation message, and the format of the composite navigation communication message is as follows:

[0041] 1. The format of the main navigation message (see Attachment 5):

[0042] Consists of consecutively broadcast frames. A frame generally has 5 subframes, each subframe has 10 words, and each word has 30 navigation code bits. The length of each code point is 0.02 seconds, the length of each word is 0.6 seconds, the subframe period is 6 seconds, and the frame period is 30 seconds. The frame should contain complete navigation message information, and transmit the real-time parameters of the navigation and communication satellite (clock or virtual clock correction parameters, frequency correction parameters, time information and satellite ephemeris, etc.). This is the winning message of the composite navigation message, and the message format of GPS is adopted here.

[0043] 2. The auxiliary navigation communication me...

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Abstract

The complex navigation telegraph is made of navigation telegraph and assisting navigation communications telegraph. It can broadcast the base point rectified data relevant parameter, being able to broadcast more data, forming wide and local difference module or wide or local reinforcement system, being able to broadcast current layer correcting module influence parameter. It realizes the telegraph communication, message communication, and broadcasting communication, with improved transmission speed, and increased in transmission data. It improves the assisting navigation communication telegraph, speeding up the configuration of the navigation positioning, realizing the communication of location and time.

Description

technical field [0001] The invention relates to the field of space technology, and is a composite navigation message in satellite navigation. Background technique [0002] The navigation message is the expression form of the information required for navigation and positioning that the satellite broadcasts to the user in the form of binary code, called data code or D code. Its contents include: satellite ephemeris, satellite clock time and correction, ionospheric delay correction, working status information, C / A code conversion to capture P code information, and general ephemeris of all satellites, etc. The user receiver can calculate the location, speed and UTC time by using the message data. The navigation message in the Global Positioning System (GPS) (see Yuan Jianping, Luo Jianjun, Yue Xiaokui, Fang Qun. Principles and Applications of Satellite Navigation. Beijing: China Aerospace Press, 2003, 9.) Arrangement is shown in Table 1, and the format is shown in Figure 1 Sho...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S1/02G01S5/02G01S5/14G01S19/02
Inventor 施浒立尚俊娜杨朋翠崔军霞雷利华
Owner NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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