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Thermosphere atmospheric density correction method

An atmospheric density and local technology, applied in the field of space physics, can solve problems such as affecting the accuracy of orbit prediction, and achieve the effect of improving the accuracy of orbit determination and prediction, and improving the accuracy.

Inactive Publication Date: 2014-05-14
BEIJING AEROSPACE CONTROL CENT
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Problems solved by technology

Since my country launched the major project of manned spaceflight in 1992, the atmospheric density model published by foreign countries for decades has been used in orbit determination. The accuracy of the model has at least 15% to 30% error in the calm period of the space environment. The period error even exceeds 100%, seriously affecting the orbit forecast accuracy

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Embodiment Construction

[0024] The present invention will be further described below with reference to the drawings and an example during a manned space flight mission.

[0025] At present, in aerospace measurement and control, communication and navigation and related technical fields, the thermospheric atmosphere density model is used to calculate the atmospheric density when the spacecraft determines the orbit. In manned spaceflight missions, the thermospheric atmosphere density models used include Jacchia series, MSIS series, and DTM. Such as Figure 4 As shown, using the method of the present invention to correct the atmospheric density of the thermosphere is specifically as follows:

[0026] Step 1: Choose a model for calculating the atmospheric density of the thermosphere

[0027] Calculate the orbit solution accuracy of each thermosphere's atmospheric density model, and the thermosphere's atmospheric density model with the highest orbital solution accuracy is selected as the model for calculating t...

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Abstract

The invention belongs to the technical field of space physics and discloses a thermosphere atmospheric density correction method. Due to the fact that a thermosphere atmospheric density calculating mode is selected, a kernel regressing method is adopted for calculating thermosphere atmospheric density errors calculated by the thermosphere atmospheric density mode, and therefore the thermosphere atmospheric density is corrected finally. According to the thermosphere atmospheric density correction method, the thermosphere atmospheric density precision is improved, and therefore the orbit determining precision and the forecasting precision of low orbit spacecrafts represented by manned spacecrafts are improved.

Description

Technical field [0001] The invention belongs to the technical field of space physics, and particularly relates to a method for correcting the atmospheric density of the thermosphere. Background technique [0002] The low-orbit spacecraft (LEO) represented by manned spacecraft, its orbit prediction accuracy is mainly affected by atmospheric resistance, and the thermospheric atmospheric density model error is the primary source of error that affects the orbit prediction accuracy. Since my country launched the manned spaceflight project in 1992, the atmospheric density model that has been published in foreign countries for decades has been used to determine the orbit. The accuracy of the model has an error of at least 15% to 30% during the calm period of the space environment. The period error even exceeds 100%, seriously affecting the accuracy of orbit prediction. Therefore, improving the calculation accuracy of the atmospheric density of the thermosphere has become a key scientifi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 周率李嘉巍李黎黄聪曹建峰张效信王劲松程国胜李勰李翠兰陈光明李星祥
Owner BEIJING AEROSPACE CONTROL CENT
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