Radio Telescope Engineering
نویسندگان
چکیده
منابع مشابه
Some Radio Telescope Considerations in Millimeter and Submillimeter Radio Astronomy
We review some aspects of radio telescope performance, particularly those relating to the characteristics of the feed system used for illuminating the antenna. We discuss the aperture eeciency, radiation pattern, beam width, and coupling and beam eeciencies, emphasizing the eeect of the aperture illumination on these quantities. The discussion should be useful for understanding calibration of a...
متن کاملRecent Radio Monitoring of Microquasars with Ratan-600 Radio Telescope
We report about the multi-frequency (1-30 GHz) daily monitoring of the radio flux variability of the three microquasars: SS433, GRS1915+105 and Cyg X-3 during the period from September 2005 to May 2006. 1. We detected clear correlation of the flaring radio fluxes and X-rays ’spikes’ at 2-12 keV emission detected in RXTE ASM from GRS1915+105 during eight relatively bright (200-600 mJy) radio fla...
متن کاملThe Ooty Synthesis Radio Telescope : First Results
A 4-km synthesis radio telescope has recently been commissioned at Ootacamund, India for operation at 327 MHz. It consists of the Ooty Radio Telescope (530 m × 30 m) and 7 small antennas which are distributed over an area of about 4 km × 2 km. It has a coverage of about ± 40° in declination δ. The beam-width is about 40 arcsec × 90 arcsec at δ = 0° and about 40 arcsec × 50 arcsec at δ = 40°. Th...
متن کاملLOFAR, a new low frequency radio telescope
LOFAR, the Low Frequency Array, is a large radio telescope consisting of approximately 100 soccer-field sized antenna stations spread over a region of 400 km in diameter. It will operate at frequencies from ∼ 10 to 240 MHz, with a resolution at 240 MHz of better than an arcsecond. Its superb sensitivity will allow for studies of a broad range of astrophysical topics, including reionisation, tra...
متن کاملGain Decomposition Methods for Radio Telescope Arrays
In radio telescope arrays, the complex receiver gains and sensor noise powers are initially unknown and have to be calibrated. Gain calibration enhances the quality of astronomical sky images and moreover, improve the effectiveness of certain radio telescope phased-array data processing techniques, such as radio interference (RFI) mitigation and beamforming. In this paper we present several clo...
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ژورنال
عنوان ژورنال: Nature
سال: 1962
ISSN: 0028-0836,1476-4687
DOI: 10.1038/196626a0