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Common view time and frequency transmitting method based on BeiDou navigation satellite system

A time-frequency transmission and navigation system technology, applied in the field of satellite navigation applications, can solve the problem that GPS cannot perform real-time time transmission, etc., and achieve the effects of easy operation, reduced labor and use costs, and accurate time transmission.

Active Publication Date: 2014-12-03
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a common-view time-frequency transfer method based on the Beidou satellite navigation system, so as to solve the problem that real-time time transfer cannot be carried out by using GPS in the prior art

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  • Common view time and frequency transmitting method based on BeiDou navigation satellite system
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  • Common view time and frequency transmitting method based on BeiDou navigation satellite system

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with a set of embodiments and accompanying drawings.

[0028] like figure 1 As shown, the present invention discloses a method for common-viewing time transfer based on the Beidou satellite navigation system. The specific steps include:

[0029] The first step is to collect data such as pseudorange, ephemeris, star clock parameters and atmospheric propagation delay parameters output by the timing Beidou receiver

[0030] In the process of using Beidou navigation satellites for time transfer, it is necessary to select a timing-type Beidou receiving device to receive Beidou satellite signals, and collect the PRN number, time, pseudorange, ephemeris orbit parameters, and star clock parameters of the tracking satellites output by the Beidou receiver a0 , a1, a2 and t0, ionospheric delay parameters and tropospheric delay parameters.

[0031] The second step is to calculate the original data of the differe...

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Abstract

The invention discloses a common view time and frequency transmitting method based on the BeiDou navigation satellite system. According to the common view time and frequency transmitting method based on the BeiDou navigation satellite system, the time difference between the local time and the time of all tracking satellites, clock difference parameters in navigation messages, the parameters of the time delay of the ionized stratum and the time delay of the troposphere and elevation angle data are measured and extracted through a timing type BeiDou receiver, and the clock differences between the local time and tracking BeiDou satellite clocks are worked out; the difference between the local time and the time of the BeiDou navigation satellite system is worked out through preprocessing of original data and weighting of elevation angles of all the tracking satellites; the time of the navigation satellite system is used as a medium, through the short message communication function of BeiDou-1, comparison results of two common view stations are exchanged, so that the time difference of the two stations is obtained, and the relative frequency difference between the two stations is worked out. By the adoption of the technical scheme, the dependence existing when GPS is used for transmitting time can be overcome, and accurate time transmission is achieved through the BeiDou navigation satellite system; high-cost hardware support is not needed, operation is easy, long-time automatic operation can be achieved, and therefore labor cost and use cost are greatly reduced.

Description

technical field [0001] The invention relates to the field of satellite navigation applications, in particular to a common-view time-frequency transfer method based on the Beidou satellite navigation system. Background technique [0002] As one of the seven basic physical quantities, time has the characteristic that it can be transmitted remotely through electromagnetic waves. High-precision time transfer is an important research direction in the field of time-frequency metrology. The existing remote time-frequency transmission methods mainly include GPS common-view method, GPS carrier-phase method and satellite two-way method. [0003] The GPS common view method uses GPS satellites as the medium, and uses GPS receivers to collect comparison data at two time transfer stations, and then exchange and process the data of the two places afterwards to obtain the time transfer results. This method is the most popular remote time transfer method used in time-frequency laboratories...

Claims

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Application Information

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IPC IPC(8): G01S19/01G04R20/04H04B7/185
CPCG01S19/39G04R20/04
Inventor 王宏博张升康易航王海峰
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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