發(fā)布時(shí)間：2018-04-19 20:56

  本文選題：深空通信 + 無線電波��； 參考：《電波科學(xué)學(xué)報(bào)》2017年04期

【摘要】：針對上合期間太陽風(fēng)湍渦不規(guī)則性對穿過日冕區(qū)無線電波所引發(fā)的太陽閃爍問題,基于弱閃爍理論提出一種幅度起伏、相位起伏和到達(dá)角起伏的預(yù)測模型.該模型充分考慮了上合期間通信鏈路的幾何模型、日冕背景參數(shù)和太陽風(fēng)湍渦譜模型.仿真結(jié)果指出,太陽風(fēng)湍渦外尺度、湍渦譜指數(shù)對太陽閃爍有較大的影響.太陽閃爍對無線電波的影響隨日徑距離的增大而逐漸減小,且隨無線電波工作頻率的提高而減小.與實(shí)測數(shù)據(jù)的對比結(jié)果進(jìn)一步表明,所提預(yù)測模型具有較高的精度,且其準(zhǔn)確性隨電波工作頻率的增大而提高.因此,提出的太陽閃爍預(yù)測模型可對未來的深空探測活動提供參考依據(jù).
[Abstract]:In view of the solar scintillation caused by the irregularity of solar wind turbulence over the coronal region, a prediction model of amplitude fluctuation, phase fluctuation and angle of arrival fluctuation is proposed based on the weak scintillation theory. The geometric model, coronal background parameters and solar wind turbulence spectrum model are fully considered in this model. The simulation results show that the external scale and spectral exponent of the solar wind turbulence vortex have great influence on the solar scintillation. The influence of solar scintillation on radio wave decreases with the increase of diurnal distance and the operating frequency of radio wave. The comparison with the measured data further shows that the proposed prediction model has a high accuracy and its accuracy is improved with the increase of the frequency of the radio wave. Therefore, the proposed solar scintillation prediction model can provide a reference for future deep space exploration activities.
【作者單位】： 華東師范大學(xué)信息科學(xué)技術(shù)學(xué)院;
【分類號】：TN011

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本文編號：1774688