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Global ionized layer total electron content multi-layer analysis method based on low earth orbit satellite

A technology of total electron content and low earth orbit, applied in the field of ionosphere, can solve the problem of not being able to fully describe the global vertical distribution characteristics of the total electron content of the ionosphere, and achieve the effect of improving the accuracy of time and space

Active Publication Date: 2021-03-19
BEIHANG UNIV
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Problems solved by technology

Although the existing two-dimensional grid model of ionospheric total electron content can already provide the global distribution of ionospheric total electron content and describe the temporal and spatial evolution characteristics of ionospheric total electron content to a certain extent, it is still unable to fully describe the ionosphere The global vertical distribution characteristics of the total electron content also have many deficiencies and limitations in the understanding of the top-level distribution characteristics of the total electron content of the ionosphere

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  • Global ionized layer total electron content multi-layer analysis method based on low earth orbit satellite
  • Global ionized layer total electron content multi-layer analysis method based on low earth orbit satellite
  • Global ionized layer total electron content multi-layer analysis method based on low earth orbit satellite

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Embodiment Construction

[0032] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be pointed out that the described embodiments are only intended to facilitate understanding of the present invention and do not serve as any limitation.

[0033] The invention provides a multi-layer analysis method based on the total electron content of the global ionosphere of low-earth orbit satellites. The method utilizes global low-earth orbit satellites distributed in different altitude groups to calculate through satellite navigation dual-frequency observations of space-borne receivers The total electron content of the ionosphere, combined with the output products of the ground satellite navigation observation network, realizes the multi-layer analysis of the spatial distribution of the total electron content of the global ionosphere, and then uses the vertical distribution profile of the electron density in the middle and low layer...

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Abstract

The invention relates to a global ionospheric total electron content multi-layer analysis method based on low earth orbit satellites, and the method comprises the steps: calculating the ionospheric total electron content through the satellite navigation double-frequency observation quantity of a satellite-borne receiver through the global low earth orbit satellites distributed at different heightgroups; achieving multi-layer analysis of global ionospheric total electron content spatial distribution in combination with an output product of a ground satellite navigation observation network, andthen correcting a multi-layer analysis result by utilizing a vertical distribution profile of medium-low-layer ionospheric electron density obtained by an occultation receiver. Compared with a traditional global ionospheric total electron content distribution calculation method, the method has the advantages that distribution characteristics of ionospheric electron densities at different heightscan be effectively extracted, the space-time precision of two-dimensional ionospheric total electron content distribution is improved, and a good technical support is provided for global three-dimensional space distribution of comprehensive cognition of the ionospheric total electron content.

Description

technical field [0001] The invention relates to a multi-layer analysis method based on the total electron content of the global ionosphere of a low-earth orbit satellite, belonging to the field of the ionosphere. Background technique [0002] The ionosphere is the part of the thermosphere above the earth that is ionized by solar radiation, and its charged particles are mainly distributed in the range of altitudes from 60km to 1000km. The charged particles in the ionosphere constitute the undulating scattering medium of space radio waves. According to the distribution of charged particles, the ionosphere will cause amplitude attenuation and phase delay of the radio signal, which is one of the main sources of space ranging errors for satellite navigation signals. The total electron content of the ionosphere can be measured by dual-frequency observations of satellite navigation signals. Based on this, the international satellite navigation service uses globally distributed grou...

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Application Information

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IPC IPC(8): G06F17/11G01S19/00
CPCG06F17/11G01S19/00
Inventor 刘杨梅俊垒
Owner BEIHANG UNIV
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