Downward 3 mm wavelength radio emission from the atmosphere in the highlands

 

K. Sh. Ashymkanov

Institute of Physical and Technical Problems of Materials Science of National Academy of Sciences of Kyrgyz Republic,

Chuy street 265a, Bishkek 720071, Kyrgyz Republic

                                            

The paper is received on October 8, 2016, after correction - on January 24, 2017

 

Abstract. The results of many years of research the downward atmospheric radiation in a mountainous area in the wake of 3mm are presented.Experimental measurements of radio brightness temperature of the atmosphere at altitudes of 760, 1660 and 3050 meters above sea level for the period of June 1985 to September 1995 are fulfilled. We used a mobile radiometric complex, assembled in the IRE on the layout of the receiver telescope of Bauman Moscow State Technical University. The measurements were performed by the method of rotating reflector. The method allows to record the downward atmospheric radiation in the range from 0 to 90 degrees inclination angle, and to perform a receiver calibration reference temperature (black body at the temperature of the surface air and liquid nitrogen). The calculations of brightness temperature of the atmosphere at the standard and radiosonde data of upper-air station "Bishkek" of Kyrgyz hydrometeorological service  according to the procedure of A.Yu.Zrazhevsky (Kotel’nikov Institute of Radio Engineering and Electronica of Russian Academy of Sciences). During the calculations we used the model of stratified atmosphere. The calculation program operates with the set of tabulated data of pressure, temperature and humidity of the atmosphere at the altitude of 20km.Brightness temperature calculation results are prepared in tables of emission indicatrix of 0 to 80 degrees inclination angle. Angle, altitude and seasonal dependence of the radiation from the atmosphere temperature and humidity are presented.

Keywords: radio waves, radiation, wavelength, atmosphere.

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Reference to this paper:

Downward 3 mm wavelength radio emission from the atmosphere in the highlands. K. Sh. Ashymkanov. Zhurnal Radioelektroniki - Journal of Radio Electronics, 2017, No. 1. Available at http://jre.cplire.ru/jre/jan17/9/text.pdf. (In Russian)