Low-orbit detection hot layer atmosphere multi-factor separation and feature extraction method

A feature extraction, multi-factor technology, applied in meteorology, measurement devices, weather forecasting, etc., can solve the problems of cumulative error, not considering the systematic deviation of detection data, etc., and achieve the effect of minimum error

Active Publication Date: 2020-03-27
中国人民解放军61741部队
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Problems solved by technology

Compared with the background parameters of atmospheric disturbances during magnetic storms, most of the existing technical processing is the atmospheric density/wind field on calm days calculated based on empirical

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  • Low-orbit detection hot layer atmosphere multi-factor separation and feature extraction method
  • Low-orbit detection hot layer atmosphere multi-factor separation and feature extraction method
  • Low-orbit detection hot layer atmosphere multi-factor separation and feature extraction method

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[0031] The present invention will be described in detail below in conjunction with the implementations shown in the drawings, but it should be noted that these implementations are not limitations of the present invention, and those of ordinary skill in the art based on the functions, methods, or structural changes made by these implementations Equivalent transformations or substitutions all fall within the protection scope of the present invention.

[0032] This embodiment provides a low-orbit detection thermospheric atmosphere multi-factor separation and feature extraction method, including low-orbit atmospheric multi-source influencing factor separation and disturbance atmospheric feature extraction during the magnetic storm process;

[0033] ginseng figure 1 As shown, the separation of multi-source influencing factors of the low-orbit atmosphere includes:

[0034] 1) Based on the low-orbit detection atmospheric data and the external geophysical condition data at the same t...

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Abstract

The invention provides a low-orbit detection hot layer atmosphere multi-factor separation and feature extraction method. The method comprises low-orbit atmosphere multi-source influence factor separation and disturbance atmosphere feature extraction in a magnetic storm process. The low-orbit atmospheric multi-source influence factor separation comprises the following steps: based on low-orbit detection atmospheric data and external geophysical condition data at the same moment, performing ascending and descending orbit separation on detection orbit data, and then recombining a detection data sequence according to a nearest neighbor condition; correcting the height of the atmosphere in the processed range based on the empirical mode; performing classification denoising processing on the recombined data based on a method of combining time sequence superposition median and error analysis; and, based on gridding atmospheric parameters of multi-condition classification processing, separating multi-source influence factors of high-level atmosphere, and extracting influence characteristics of local time, latitude, season, terrestrial magnetism and solar radiation on hot-layer atmosphere.The method is small in feature extraction error.

Description

technical field [0001] The invention belongs to the technical field of upper atmosphere analysis and forecasting, and in particular relates to a multi-factor separation and feature extraction method for low orbit detection thermosphere atmosphere. Background technique [0002] Changes in the upper atmosphere are affected by various geophysical conditions and are a common result driven by internal and external sources. External drivers are mainly solar radiation and geomagnetic disturbances. During a magnetic storm, the energy generated by the interaction between the solar wind and the magnetosphere enters the high-latitude ionosphere and thermosphere in the form of Joule heating and particle precipitation. Physical processes respond to geomagnetic disturbances, causing changes in the polar atmosphere's composition, temperature, and thermal expansion that alter atmospheric circulation. Because there are many factors affecting the change of atmospheric density during a storm...

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Application Information

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IPC IPC(8): G01W1/10
CPCG01W1/10
Inventor 张晓芳马杰陈光明孙凌峰白钧水高泽
Owner 中国人民解放军61741部队
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