12GHz電波的強度閃爍觀測和結(jié)果分析
OBSERVATION AND ANALYSIS OF 12GHz EELCTRIC-WAVE INTENSITY SCINTILLATION AT LOW ELEVATION ANGLE
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摘要: 本文利用自行研制的數(shù)據(jù)采集和處理系統(tǒng)發(fā)展了一種以跟蹤太陽的方式研究低仰角晴空大氣湍流引起的12GHz電波強度閃爍的方法,克服了對衛(wèi)星信標的依賴性。從1989年1月至4月進行了觀測,得出了一些有價值的統(tǒng)計結(jié)果。
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關(guān)鍵詞:
- 電波強度閃爍; 低仰角觀測; 晴空大氣湍流
Abstract: On the basis of authers developed data sampling and processing system, the 12GHz intensity scintillation of clear air turbulence has been observed and analysed at low elevation angle by tracing the sun. The experimental results are given and discussed. The con-clusions are obtained as follows: (1) Between 16 and 4, the lower the elevation angle, the larger the sciatillation intensity in clear air will be. Scintillation is most probably to appear two or three days after rain. (2) The frequency at flection point (ft) appears, in general, between 0.1Hz and 1Hz. -
P. S. L. Lo, et al., Electron. Lett., 20 (1984), 307-308.[2]R. V. Webber, et al., Ann. Telecommun., 35 (1980) 11-12, 494-500.[3]J. I. Strckland, et al., Ann. Telecommun., 32 (1977) 11-12, 530-535.[4]余少華,12GHz對流層閃爍特性,武漢大學(xué)碩士論文,1989年.[5]余少華,姚博文,電腦與微電子技術(shù),1988年,第4期,第42-43頁.[6]余少華,電子與電腦,1990年,第9期,第4-5頁.[7]A. 石丸著,黃潤恒,周詩健譯,隨機介質(zhì)中波的傳播和散射,科學(xué)出版社,1986年.[8]J. Haddon, E. Vilar, IEEE Trans. on AP, AP-34 (1986) 5, 646-657. -
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