Method for forecasting occurrence probability of ionospheric scintillation in low-latitude areas of China

Abstract

The invention discloses a method for forecasting the occurrence probability of ionospheric scintillation in low-latitude areas of China. The method includes: an ionospheric irregularity intensity CkL inversion method based on an ionospheric scintillation index S4, a probability density distribution model of ionospheric irregularity intensity CkL of low-latitude areas of China which changes with solar activity index Rz, geomagnetic activity index Kp, geographical position, season and time, and an ionospheric scintillation occurrence probability calculation method. The method provided by the invention can calculate the occurrence probability of an ionospheric scintillation event under conditions of designated place, time, solar activity index Rz, geomagnetic activity index Kp, working frequency band, ionospheric scintillation index S4 threshold value and the like according to user demands.

Description

technical field [0001] The invention relates to the fields of satellite communication, satellite navigation, radar and measurement and control, and is used to realize medium and long-term forecasting of ionospheric scintillation effects in satellite communication / satellite navigation / radar / measurement and control systems, and is used for system margin design, signal system design, and satellite orbit design Provide technical support. Background technique [0002] On the background of the normal electron density of the ionosphere, there are ionosomes with different densities and scales floating, which are called ionosphere inhomogeneous bodies. When the satellite signal propagates in the ionosphere inhomogeneous body, it will cause the change of propagation path and propagation time, which will cause the amplitude, phase and angle of arrival of the signal to fluctuate rapidly, resulting in signal fading, frequency shift, etc., which is called ionosphere flashing. The scinti...

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Problems solved by technology

[0004] In China, there is only a fixed-site ionospheric scintillation probability forecast model established by researchers such as the Chinese Academy of Sciences using single-station ionospheric scintillation observation data, which does not have the ability to expand the application of ionospheric scintillation probability forecasts in other frequency bands and other regions.

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