【摘要】：電離層是地球大氣環(huán)境中最為關(guān)鍵的部分,電離層的監(jiān)測對移動通信、載人航天、衛(wèi)星定位和導(dǎo)航等活動有著重要的影響。非相干散射雷達(ISR)是探測電離層最強大的地基設(shè)備,其具有探測功能強、參量多、精度高、分辨率好、高度范圍覆蓋大等優(yōu)點。開展非相干散射雷達相關(guān)技術(shù)的研究可以極大的提升研究電離層的能力。本文結(jié)合非相干散射雷達探測理論,綜合考慮雷達系統(tǒng)參數(shù),環(huán)境干擾,信號處理方法等因素對雷達探測的影響,建立了非相干散射雷達仿真系統(tǒng)的主要模型及體系結(jié)構(gòu),完成了一套仿真精度高,可靠性好的雷達仿真系統(tǒng)。本文還基于非相干散射雷達參數(shù)反演理論,研究了利用法拉第旋轉(zhuǎn)效應(yīng)反演電離層參數(shù)的技術(shù),搭建了數(shù)據(jù)反演模型,同時利用美國Jicamarca雷達實測數(shù)據(jù)完成了數(shù)據(jù)處理。主要工作如下:第一,分析了電離層非相干散射的物理模型,對非相干散射雷達系統(tǒng)仿真進行了需求分析。按照非相干散射雷達實際體系結(jié)構(gòu),構(gòu)建了雷達系統(tǒng)仿真主要模型,并按照模塊化的思想,先對ISR雷達的主要功能進行分模塊仿真,然后將各個模塊組合成完整的仿真系統(tǒng)。選擇了可靠的實測數(shù)據(jù)與仿真結(jié)果進行對比,驗證的仿真系統(tǒng)的合理性與可靠性。第二,研究了利用法拉第旋轉(zhuǎn)效應(yīng)反演電離層參數(shù)的算法,結(jié)合電磁波傳播的磁離子效應(yīng)與軟目標(biāo)雷達方程理論推導(dǎo)了雷達反演數(shù)據(jù)模型。同時采用美國Jicamarca雷達的實測數(shù)據(jù)完成了數(shù)據(jù)處理。通過反演結(jié)果的分析與對比,證明了反演技術(shù)的價值。
[Abstract]:Ionosphere is the most important part of the earth's atmospheric environment. Ionospheric monitoring plays an important role in mobile communication, manned spaceflight, satellite positioning and navigation. Incoherent scattering radar (ISR) is the most powerful ground equipment for ionospheric detection. It has many advantages such as strong detecting function, many parameters, high precision, good resolution and wide height coverage. The research of incoherent scattering radar technology can greatly improve the ability to study the ionosphere. Combined with the detection theory of incoherent scattering radar and considering the influence of radar system parameters, environment interference and signal processing methods, the main model and system structure of the simulation system of incoherent scattering radar are established in this paper. A radar simulation system with high simulation precision and good reliability is completed. Based on the theory of incoherent scattering radar parameter inversion, this paper studies the technique of inversion of ionospheric parameters by Faraday rotation effect, builds a data inversion model, and completes the data processing using the measured data of Jicamarca radar in the United States. The main work is as follows: firstly, the physical model of ionospheric incoherent scattering is analyzed, and the requirement of incoherent scattering radar system simulation is analyzed. According to the actual system structure of incoherent scattering radar, the main simulation model of radar system is constructed. According to the idea of modularization, the main functions of ISR radar are first simulated by modules, and then each module is integrated into a complete simulation system. The rationality and reliability of the simulation system are verified by comparing the reliable measured data with the simulation results. Secondly, the inversion algorithm of ionospheric parameters using Faraday rotation effect is studied, and the radar inversion data model is derived by combining the magneto ion effect of electromagnetic wave propagation with the theory of soft target radar equation. At the same time, the measured data of Jicamarca radar are used to complete the data processing. The value of the inversion technique is proved by the analysis and comparison of the inversion results.
【學(xué)位授予單位】：南昌大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN955

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