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1.
C. C. Zammit R. E. Hill R. W. Barker 《International Journal of Infrared and Millimeter Waves》1982,3(2):189-203
Further measurements of atmospheric emission from a site in the Canary Islands (Izana, âltitude 2.4 km) have been made during the month of August 1980. The measurements were made with a polarising Interferometer and a composite Ge bolometer. An independent measurement of the precipitable water vapour was made using Infrared Hygrometers. The experimental details are described and the spectra obtained are compared with model spectra using the measured precipitable water vapour. 相似文献
2.
Yan Yi Wang Lijiun Huang Jiying 《International Journal of Infrared and Millimeter Waves》1993,14(5):1117-1125
The rainfall intensity accumulative distribution, raindrop size and canting angle distributions in Xi'an(108.9 E, 34.3 N) have been obtained from data measured over a long period of time. Rain induced crose polarization in this environment has been studied. The crose polarization discrimination, XPD, was compu ted over a frequency range of 19.3 to 300 GHz for non spherical drops. The variations of XPD with frequency, rainfall rate and copolar attenuation, CPA, were investigated. The computational resulte are in good agreement with experimental data. A mathematical relationship was established between the XPD and CPA, raindrop canting angle, which result is in good agreement with experimental data. The cumulative distribution of rain induced cross polarization for eleven years and in month have been ob tained with the cumulative distribution of the rain rate from the data measured from 1975 to 1985. The role of multiple scattering also has been discussed, it is shown that the multiple scattering play an important part in short millimeter wave. 相似文献
3.
X.-M. Su P. Dong J.-Y. Gao K. Muraoka 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2000,12(1):193-196
Electromagnetically induced transparency in a non-uniform plasma is investigated. We discuss the possible frequency ranges
in which a weak beam below cutoff can propagate transparently in this plasma with the presence of a strong high frequency
field. We also analyze the effect of driving intensity on the frequency range of the probe.
Received 3 March 2000 and Received in final form 21 April 2000 相似文献