Method and system for satellite clock error forecasting

A clock error prediction and satellite clock error technology, applied in the field of satellite positioning, can solve the problems of large model error, limited gray model fitting and prediction accuracy, etc., to improve reliability and effectiveness, improve prediction accuracy, and improve prediction effect and the effect of precision

Active Publication Date: 2022-06-28
QIANXUN SPATIAL INTELLIGENCE INC
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Problems solved by technology

However, the gray model (GM(1,1)) itself has a large model error. In the current improvement methods for the gray model, the inherent model error of the gray model has not been effectively taken into account, thus limiting the gray model. The fitting and forecasting accuracy of

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  • Method and system for satellite clock error forecasting
  • Method and system for satellite clock error forecasting
  • Method and system for satellite clock error forecasting

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Embodiment Construction

[0051] In the following description, numerous technical details are set forth in order to provide the reader with a better understanding of the present application. However, those of ordinary skill in the art can understand that even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can be realized.

[0052] Explanation of some concepts:

[0053] FFT: fast Fourier transform, fast Fourier transform method.

[0054] GCV: Generalized Cross-Validation, generalized cross-validation.

[0055] In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0056] At present, in the field of satellite clock error forecasting, the proposed grey model has been improved. For example, Zhu Lingfeng gave su...

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Abstract

The application relates to the field of satellite positioning, and discloses a satellite clock error forecasting method and system thereof. The method includes: obtaining the original clock error data to obtain the corresponding clock error sequence; constructing a gray clock error prediction model according to the clock error sequence; solving the parameters of the gray clock error prediction model according to the semi-parametric kernel estimation method to correct The model error of the gray clock error prediction model; the satellite clock error prediction is performed according to the corrected gray clock error prediction model. The implementation of the present application effectively improves the model error in the gray clock error forecasting model, improves the fitting of the model and the forecasting accuracy, and the forecasting effect is better.

Description

technical field [0001] The present application relates to the field of satellite positioning, in particular to satellite clock error prediction technology. Background technique [0002] The navigation satellite is a time-based ranging system, and the high-precision spaceborne atomic clock is the basis of the global navigation satellite system. The time synchronization of the navigation system and the improvement of its related service performance are of great significance. Since the on-board atomic clock is easily affected by the external environment and its own factors during the high-speed motion of the satellite, it is difficult to grasp its detailed change laws, so it is very difficult to establish an accurate atomic clock operation model, which leads to accurate prediction of satellite clocks accordingly. The difference is also very difficult. [0003] In recent years, in order to improve the prediction accuracy of satellite clock errors, many scholars at home and abr...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/27G01S19/37
CPCG01S19/27G01S19/37
Inventor 颜雄
Owner QIANXUN SPATIAL INTELLIGENCE INC
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