大氣時(shí)變特性對(duì)電波折射修正精度影響的實(shí)驗(yàn)研究
THE EXPERIMENTAL STUDY ON THE EFFECT OF TIME VARIATION OF ATMOSPHERE ON THE PRECISION OF RADIOWAVE REFRACTIVE CORRECTION
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摘要: 要提高外彈道測(cè)量系統(tǒng)的精度,就必須提高電波折射修正精度,這樣常用的球面分層折射修正公式就不能滿足要求。因?yàn)榇髿鈪?shù)是時(shí)空四維結(jié)構(gòu)函數(shù),所以新的大氣折射修正公式不僅要考慮大氣在垂直、水平方向上的變化,而且也需要考慮其隨時(shí)間變化特性的影響,本文給出了大氣時(shí)變特性對(duì)折射修正精度影響的實(shí)驗(yàn)結(jié)果。
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關(guān)鍵詞:
- 大氣時(shí)變特性; 折射修正
Abstract: To improve the precision of the outer measuring system,the accuracy of radiowave refractive correction must be raised. The refractive correction's formulation in the assumption of atmospheric ballface stratification does not meet the requirements,because the atmospheric parameters are fucnctions of the four dimention at temporospatial structure. The new refractive correction's formulation needs to study the atmospheric variations not only on space, but also on time. This paper gives the experimental results of the effect of the atmospheric time variation on the precision of the radiowave refractive correction. -
江長(zhǎng)蔭.低仰角無(wú)線電定位測(cè)速的大氣層電波傳播誤差.電波與天線,1982, (1): 1-62.[2]張瑜.三維大氣電波折射修正實(shí)驗(yàn)研究.電波科學(xué)學(xué)報(bào), 1996, 11(4): 82-86.[3]謝益希,等. 電彼傳播--超短波,微波,毫米波. 北京: 電子工業(yè)出版社, 1990年,第二章.[4]張瑜, 高霞. 低空大氣電波時(shí)延和彎曲對(duì)無(wú)線電定位的影響. 電子技術(shù)與信息化, 1996年,4(3): 87-89.[5]Hopfield H S. Tropospheric effect on electromagnetically measured range:[6]Prediction from surface weather data. Radio Science. 1971. 6(3): 357-367.[7]Ulaby F T, Moore R K, Fung A K. Microwave Remote Sensing, Vol 1, 1981, 270-174.[8]李蘭, 等. 用作對(duì)流層折射修正的雙頻輻射計(jì)最佳頻率選擇. 第四屆全國(guó)電波傳播學(xué)會(huì)論文集,1991年. -
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