實時定標(biāo)微波輻射計
REAL-TIME CALIBRATED MICROWAVE RADIOMETER
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摘要: 本文提出了一種新形式的微波輻射計,即實時定標(biāo)微波輻射計。這種體制的微波輻射計具有的特點是:不受增益波動的影響,不受本機噪聲變化的影響,能夠提供連續(xù)的定標(biāo),動態(tài)范圍寬等。制作了一臺C波段實時定標(biāo)微波輻射計,積分時間為0.2s,靈敏度為0.2K,線性度為0.9990,適應(yīng)于地面、機載和星載微波遙感。
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關(guān)鍵詞:
- 微波輻射計; 實時定標(biāo)微波輻射計
Abstract: In this paper, a new type of microwave radiometer, real-time calibrated microwave radiometer was introduced. It has the following characteristics: (1) insensitive to system gain variations; (2)insensitive to receiver noise temperature variations; (3) the ability to provide realtime calibration; (4) wide measurement range. The prototype of real-time calibrated microwave radiometer at C -band was made in our laboratory. The integration time is 0.2s, the sensitivity is 0.2K,linearity of the receiver is 0.9990.... -
Dicke R H. The measurement of thermal radiation at microwave frequencies[J].The Review of Scientific Instruments.1946, 17(7):268-275[2]張俊榮.零平衡微波輻射計研制.長春遙感試驗論文集(2).北京:科學(xué)出版社,1988, 18-31.[3][3][4]Hach J P. A very sensitive airborne microwave radiometer using two reference temperatures. IEEE Trans. on MTT, 1968, MTT-16(9): 629-636.[5]張俊榮,趙凱.數(shù)字增益自動補償型微波輻射計.專利號:ZL96220482. 2.[6]Tiuri M E. Radio astronomy receivers. IEEE Trans. on AP, 1964, 12:930-938. -
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