Emulation method of high fidelity onboard foresight weather radar low-altitude wind shear signal

Abstract

The invention relates to an emulation method of high fidelity onboard foresight weather radar low-altitude wind shear signals, which belongs to the technical field of emulation of radar echo signals and comprises the following steps of: (1) establishing a wind shear wind field model by using wind field emulation software; (2) computing reflectivity factors of wind shear wind fields according to density information of an emulation wind field; (3) initializing an emulation scene; (4) determining opposite position information of scattering particulates in the scanning orientation and an airplane; (5) computing the amplitude and the phase position information of echo signals of the scattering particulates of the wind field; (6) superposing echoes of the scattering particulates to form an echo signal in the scanning orientation; and (7) updating a scanning angles of an antenna, and judging scanning range, if the scanning range is exceeded, outputting emulation results, and otherwise, repeating the steps. The invention has the advantages of simple method, good emulation effect, echo emulation of onboard foresight weather radar wind shear targets at high fidelity, and the like.

Description

technical field [0001] The invention belongs to the technical field of radar echo signal simulation, in particular to a high-fidelity airborne forward-looking weather radar low-altitude windshear signal simulation method. Background technique [0002] At present, low-altitude wind shear is recognized as the most harmful weather phenomenon to flight safety during the take-off and landing phases of aircraft. The detection of meteorological targets such as low-altitude wind shear by civil aviation aircraft relies on airborne forward-looking weather radar. The "eyes" of the aircraft. Due to the characteristics of high risk, short duration and difficult detection of low-altitude wind shear, its actual data is difficult to obtain and can only be obtained through high-fidelity simulation. [0003] Most of the simulations of meteorological target echo signals are based on statistical models, and the simulation is carried out according to the correlation of targets in time. However...

AI Technical Summary

Problems solved by technology

At present, there are mainly three modeling methods for low-level wind shear wind field: the first type of model is based on the actual measurement data, which is not enough to reflect the essential characteristics and dynamic development process of low-level wind shear; the second type The first class model is an engineering simplified model, which generally can only reflect the velocity characteristics of the wind shear, but not all of its characteristics, so it cannot truly reflect the characteristics of the echo signal of the low-altitude wind shear radar; the third type of model is The TASS (Terminal Area Simulation System) model established by NASA in the United States is not suitable as an engineering model for real-time simulation of low-altitude wind shear because of the complex technology involved, high requirements for the system, and the need for a large-scale computer to solve it.

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