Ionosphere hybrid modeling method in short-wave ray tracing technique

Abstract

The invention relates to an ionosphere hybrid modeling method in a short-wave ray tracing technique. The method comprises the following eight steps conducted through an input module, an IRI module, a QPS module and a ray tracing module: 1. inputting initial parameters such as testing time, working frequency, transmitter coordinates, receiver coordinates, antenna elevation range and the like; 2. figuring out reflection midpoint position, geocentric angle, great-circle distance and azimuth angle according to the transmitter coordinates and the receiver coordinates; 3. calculating the relevant parameters of an E layer and an F2 layer at a radio reflection midpoint at the testing time by using IRI model software; 4. transmitting the parameters of each layer figured out by an IRI model to a QPS model and using the parameters as input parameters to establish the multilayer quasi-parabolic plasma frequency distribution of a reflection space; 5. using the multilayer quasi-parabolic plasma frequency distribution of the reflection space and taking a group path as an independent variable to gradually solve a ray tracing equations set by starting from the transmitter position to obtain a group path simulation value of radio waves from the transmitter to the receiver; 6. conducting ray tracing calculation under the IRI model plasma frequency distribution to obtain a radio wave group path simulation value under the IRI model; 7. conducting a test to obtain an actually measured radio wave group path; and 8. comparing the simulation value with the actually measured value to verify the validity of the hybrid modeling method.

Description

(1) Technical field [0001] The invention relates to an ionospheric mixing modeling method based on an international reference ionospheric model and a multi-layer quasi-parabolic model, in particular to an ionospheric mixing modeling method in shortwave ray tracing technology, and belongs to the technical field of shortwave communication. (2) Background technology [0002] In the short-wave band, the ionosphere changes very little within a wavelength, and the radio wave can be approximated as a ray, and ray tracing technology is used to study the propagation and reflection of radio waves in the ionosphere. The electron concentration distribution in the ionosphere is called the ionosphere model, and the ray tracing technology must be combined with the ionosphere model. At present, there are two typical ionosphere models used in the ionosphere ray tracing technology in my country: one is the international reference ionosphere model (International Reference Ionosphere) model, ref...

AI Technical Summary

Problems solved by technology

The invention provides a hybrid ionospheric modeling method in short-wave ray tracing technology, which uses IRI model and QPS model in a mixed application, calculates the ionospheric parameters in the reflection area from the IRI model and substitutes them into the QPS model for ray tracing, which ensures The simplicity and convenience of the simulation input conditions solve the problem of inconvenient access to the input parameters of the QPS model, and at the same time improve the accuracy of the simulation estimation, avoiding the problem of low accuracy of the simulation results simply using the IRI model

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