Computer Science – Performance
Scientific paper
Jul 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3357..593k&link_type=abstract
Proc. SPIE Vol. 3357, p. 593-598, Advanced Technology MMW, Radio, and Terahertz Telescopes, Thomas G. Phillips; Ed.
Computer Science
Performance
1
Scientific paper
We present a study of requirements on the sensitivity of mm andmillimeter wave receivers for application in radio astronomy. The study is based on the experience of the operation of the SIS receivers at the radio telescopes of IRAM and considers also the conditions of operation at the future radioastronomical instruments such as LSA, MMA and LSMA. Using a radio telescope and atmospheric model we consider the effect of the receiver sensitivity on the radio telescope operation in terms of observing time. The observing time at a radio telescope depends on the system noise temperature as strongly as on collecting area, which defines nearly all the cost of modern mm andmm instruments. As a compromise between the receiver development effort and the system performance we introduce a criterion of an 'optimum' receiver noise. A strict requirement on the receiver operation is obtained. For an efficient use of the existing and the future radio telescopes, a 10 - 20 K SSB receiver noise in the mm band and 20 - 40 K SSB atmillimeter wavelength are necessary. Finally the status and the perspectives for SIS receiver development for mm and sum mm radio astronomy are presented.
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