Calibration system of BMSTU radio-telescope RT-7.5

Author

Efremov, V.A. ; Rozanov, B.A.

Author_Institution

Bauman Moscow State Tech. Univ., Russia

Volume

2

fYear

2001

fDate

2001

Firstpage

796

Abstract

For calibration of 2.2 and 3.3 mm radiometers installed in secondary (Cassegrain) focus of the radiotelescope RT-7.5 the black-body calibrator was designed. The calibrator is destined for successive installation of two levels of calibrating noise signal in two bands simultaneously. Two levels are necessary for determination of origin and brightness temperature scaling factor. Due to the big width of signal beams and necessity of providing equal calibrating signal levels at the two wavelengths, black-body radiators were chosen. Temperatures of the black-body radiators are stabilized at +50°C and +70°C

Keywords

calibration; radiometers; radiotelescopes; reflector antennas; 2.2 mm; 3.3 mm; 50 degC; 70 degC; Cassegrain focus; RT-7.5 radiotelescope; black-body calibrator; brightness temperature scaling factor; calibrating noise signal; calibration; equal calibrating signal levels; radiometers; secondary focus; signal beams; Bridge circuits; Calibration; Electric resistance; Radio astronomy; Radiometers; Resistors; Switches; Temperature distribution; Temperature sensors; Thermostats;

fLanguage

English

Publisher

ieee

Conference_Titel

Physics and Engineering of Millimeter and Sub-Millimeter Waves, 2001. The Fourth International Kharkov Symposium on

Conference_Location

Kharkov

Print_ISBN

0-7803-6473-2

Type

conf

DOI

10.1109/MSMW.2001.947315

Filename

947315