电离层行进式扰动对外辐射源天地波雷达系统的影响

Effects of the travelling ionospheric disturbance on sky-surface wave passive radar system

摘要:
电离层扰动导致外辐射源天地波雷达的回波信号存在多普勒频移、多普勒展宽及衰落等效应. 以电离层准抛物线模型为背景,利用电离层行进式扰动(Travelling Ionospheric Disturbance,TID)模型和数值射线追踪技术,定量研究了TID对PD变换的影响;结合外辐射源雷达信号处理的关键技术,着重分析了TID对该雷达系统性能的影响. 仿真结果对外辐射源天地波雷达的系统设计与实际应用具有指导意义.

Abstract:
Ionospheric disturbance results Doppler frequency shift, the doppler broadening, fading effect, etc in sky-surface wave passive radar's echoes. Based on the ionospheric quasi-parabolic model, a numerical ray tracing technique is applied into the travelling ionospheric disturbance(TID) model for quantitatively studying the effect of TID on the PD transforms. The effects of TID on the radar system performance are analyzed combined with the key technologies of passive radar signal processing. Simulation results have guiding significance for the system design and practical application of sky-surface wave passive radar.