GNSS observation station nonlinear motion modeling method and device

A modeling method and nonlinear technology, applied in the field of global positioning and navigation system, can solve the problem of low modeling accuracy, and achieve the effect of improving modeling accuracy

Pending Publication Date: 2019-07-30
PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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Problems solved by technology

[0005] The purpose of the present invention is to provide a nonlinear motion modeling method for GNSS stations to solve the problem of low modeling accuracy caused by ignoring short-period items in the prior art; the present invention also provides a nonlinear motion modeling method for GNSS stations The model device is used to solve the problem of low modeling accuracy due to the neglect of short-period items in the prior art

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  • GNSS observation station nonlinear motion modeling method and device
  • GNSS observation station nonlinear motion modeling method and device
  • GNSS observation station nonlinear motion modeling method and device

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[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] Method example:

[0027] Such as figure 1 As shown, the GNSS station nonlinear motion modeling method of the present embodiment comprises the following steps:

[0028] Step 1. Obtain the original coordinate time series S of the GNSS station. The specific process is as follows:

[0029] Select the coordinate time series data of GPS stations at a certain latitude around the world on the IGS website (the website's URL is ftp: / / igs-rf.ensg.eu / pub / res / ) as the original coordinate time series of GNSS stations S, let the original coordinate time series S={s 1 ,s 2 ,s 3 ...}.

[0030] Step 2. Perform wavelet decomposition and reconstruction on the original coordinate time series S to obtain low-frequency parts and multi-layer high-fr...

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Abstract

The invention provides a GNSS observation station nonlinear motion modeling method and device, and belongs to the technical field of global positioning navigation systems. The method comprises the steps of obtaining an original coordinate time sequence of a GNSS observation station; performing wavelet decomposition and reconstruction on the original coordinate time sequence to obtain a low-frequency part and a multi-layer high-frequency part; performing singular spectrum decomposition and reconstruction on the low-frequency part and each layer of high-frequency part; synthesizing the low-frequency part after singular spectrum decomposition and reconstruction and the high-frequency part of each layer to obtain a fitting sequence of an original coordinate time sequence; and modeling the fitting sequence. The method comprises the following steps: an original coordinate time sequence is decomposed into relatively single and smooth low-frequency parts and high-frequency parts of all layersby utilizing wavelet decomposition and reconstruction; and then singular spectrum decomposition and reconstruction are performed on each part, so that the probability that part of periodic items suchas seasonal periodic items and monthly periodic items are rejected as noise is reduced to a certain extent, and the modeling precision is improved.

Description

technical field [0001] The invention relates to a nonlinear motion modeling method and device of a GNSS station, belonging to the technical field of global positioning and navigation systems. Background technique [0002] With the continuous enrichment of GNSS (Global Navigation Satellite System) observation data and the continuous development of data processing technology, various geophysical phenomena and seasonal influences can be obtained by analyzing the nonlinear motion of the station. If this part Modeling and fitting the residual law to eliminate its influence can further improve the accuracy of GPS station coordinates. [0003] Although the epoch coordinates and velocity fields of reference stations in the International Terrestrial Reference Frame ITRF (International Terrestrial Reference Frame) have reached the millimeter level, almost all IGS (International GPS Service) station coordinate time series (especially in the vertical direction) show significant Non-lin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F2119/12G06F30/20
Inventor 戴海亮孙付平朱新慧肖凯刘婧
Owner PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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