Ionospheric parameter inversion and large-scale model reconstruction method based on wide-area distributed short-wave network

Abstract

The invention relates to an ionospheric parameter inversion and large-scale model reconstruction method based on a wide-area distributed short-wave network. A short-wave cooperative communication signal transmitted in a network is collected synchronously; according to the signal quality received by each station, proper receiving stations are selected and signal delays between all transmitting stations and the receiving stations are estimated respectively; time delay data obtained by each receiving station are transmitted to a central station server; and then a current local ionospheric parameter is inverted in the central station server and large-scale ionospheric model reconstruction is performed accordingly. According to the invention, current ionospheric cutoff frequency, bottom heightand maximum electron concentration height parameter inversion and the upper-space large-scale ionospheric model reconstruction can be realized without any special design of an ionospheric detection device, so that lots of station construction, maintenance, management, and usage costs are saved; and the obtained ionospheric model parameters have the important application value in high-precision positioning of short-wave signals and sky-wave radar target tracking.

Description

Technical field [0001] The invention belongs to the technical field of ionospheric detection and communication, and specifically relates to a method for ionospheric parameter inversion and large-scale model reconstruction based on a wide-area distributed shortwave network. Background technique [0002] Shortwave communication has the characteristics of simple equipment, mature hardware technology, flexible communication methods, long communication distance, and its propagation medium is not easily destroyed through ionospheric refraction. It has been widely used in government, military, diplomatic, and commercial departments. However, the ionosphere is a non-linear time-varying medium. It is affected by factors such as the sun and geomagnetism. The ionosphere has very complex characteristics such as "space-time-frequency-polarization", and it has serious effects on the propagation of short-wavelength electromagnetic waves. Important effects are mainly manifested in the effects of...

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Problems solved by technology

[0003] At present, detection methods for ionospheric parameters include ionospheric vertical measurement, oblique measurement, and oblique return detection. These methods require independent transceiver systems and information processing systems, and can only obtain the ionization In order to obtain the ionospheric parameters over the entire country, a large number of ionospheric vertical measurement, oblique measurement and oblique return detection systems must be established, which requires a lot of expenses for station construction, maintenance, management and use

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