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Preprocessing method for common view data of Beidou satellite navigation system

A technology of data preprocessing and navigation system, applied in the field of data processing, can solve the problems of unsatisfactory smoothing effect and difficult selection of smoothing factors, and achieve the effect of fast calculation speed, small calculation amount, and elimination of random errors

Inactive Publication Date: 2014-12-10
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a data preprocessing method for Beidou common-view time-frequency transmission, which solves the unsatisfactory smoothing effect of commonly used smoothing methods and the difficulty in selecting smoothing factors in traditional Vondrak smoothing methods in current common-view data processing The problem

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  • Preprocessing method for common view data of Beidou satellite navigation system
  • Preprocessing method for common view data of Beidou satellite navigation system
  • Preprocessing method for common view data of Beidou satellite navigation system

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with a set of embodiments and accompanying drawings.

[0033] The invention discloses a data preprocessing method for Beidou common-view time transfer. The specific steps of the method include:

[0034] The first step, the selection of common view data

[0035] In the Beidou common-view time transfer technology, when selecting common-view data, in addition to receiving the same satellite signal, the following three conditions must be met at the same time:

[0036] 1) The tracking time is the same, and the two time-frequency laboratories must observe the same satellite at the same time, so that the error of the satellite clock can be completely eliminated;

[0037] 2) The altitude angle is not less than 15°. When the satellite altitude angle is too low, it is difficult to correct the ionospheric delay error, and the influence of multipath effect is intensified;

[0038] 3) Tracking length. For GPS, a ...

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Abstract

The invention discloses a preprocessing method for common view data of a Beidou satellite navigation system. The method includes the steps of selecting proper common view data according to an observation state of a time frequency laboratory and a satellite state; correcting the delay during signal transmission of the selected common view data; performing gross error elimination on the corrected common view data; smoothing the common view data through a k-order Vondrak filter, selecting an optimal smoothing factor through iterative and least squares estimation, and eliminating random errors. The preprocessing method for the common view data of the Beidou satellite navigation system is low in calculation amount, high in computation speed and capable of quickly obtaining the proper smoothing factor and effectively eliminating the random errors in the common view data.

Description

technical field [0001] The invention relates to a data processing method, in particular to a data preprocessing method used for common-view time-frequency transmission of the Beidou satellite navigation system. Background technique [0002] During the common-viewing time-frequency transmission process of the Beidou satellite navigation system, the two time-frequency laboratories participating in the common-viewing observe the same Beidou satellite at the same time, and obtain the time difference data between their respective local clocks and the satellite-borne clock of the Beidou satellite. The link exchanges the measured data with each other, and the time difference between the two time-frequency laboratories can be obtained by removing the on-board clock after data processing, so as to realize the Beidou common-view time transfer. [0003] Due to interference when receiving the Beidou signal, in order to obtain a more accurate time difference between the local clock and t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/23
CPCG01S19/23
Inventor 易航王宏博张升康王海峰
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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