The Use of Extraterrestrial Radio Sources in the Measurement of Antenna Parameters

Guidice, D. A.; Castelli, J. P.

doi:10.1109/taes.1971.310353

Cited by 24 publications

(18 citation statements)

References 7 publications

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“…[41] The antenna pattern in the receiving mode (without transmission) can be measured by using emissions from radio stars [e.g., Guidice and Castelli, 1971;Czechowsky et al, 1984;Fukao et al, 1985c]. We used Cygnus-A, which is the most intense point radio source detectable by the EAR and has a luminance temperature of 53,000 K at the EAR operating frequency of 47.0 MHz [Maeda et al, 1999].…”

Section: Radio Star Measurements For Receiving Antenna Patternmentioning

confidence: 99%

Equatorial Atmosphere Radar (EAR): System description and first results

et al. 2003

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[1] A VHF Doppler radar with an active phased-array antenna system, called the Equatorial Atmosphere Radar (EAR), was established recently at the equator near Bukittinggi, West Sumatra, Indonesia (0.20°S, 100.32°E, 865 m above sea level). The EAR is a large monostatic radar which operates at 47.0 MHz with peak output power of 100 kW. The EAR uses a circular antenna array, approximately 110 m in diameter, which consists of 560 three-element Yagi antennas. Each antenna is driven by a solid-state transmitter-receiver module. This system configuration allows the antenna beam to be steered electronically up to 5,000 times per second. The scientific objective of the EAR is to advance knowledge of dynamical and electrodynamical coupling processes in the equatorial atmosphere from the near-surface region to the upper atmosphere. The equatorial atmosphere over Indonesia is considered to play an important role in global change of the Earth's atmosphere. This paper presents the system description of the EAR, including observational results of the equatorial atmosphere made for the first time with altitude resolution of 75-150 m.

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Section: Radio Star Measurements For Receiving Antenna Patternmentioning

confidence: 99%

Equatorial Atmosphere Radar (EAR): System description and first results

et al. 2003

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“…As emissões tipo-U são principalmente observadas em comprimentos de onda métricos e decamétricos (STONE;FAINBERG, 1971;KARLICKÝ;TLAMICHA, 1976). No entanto, emissões tipo-U decimétricas também foram relatadas (YAO et al, 1997a;1997b;GÜDEL;BENZ, 1988;ASCHWANDEN et al, 1992;MARTENS, 1994;KLEIN, 1997;WANG et al, 2001;CECATTO et al, 2002;DUTRA;GURANIERI;FERNANDES, 2008;DUTRA, 2010;FERNANDES et al, 2012) até frequência de 3,8 GHz (WANG et al, 2001).…”

Section: Introductionunclassified

Emissões Solares Tipo-U E Tipo-J Decimétricas Registradas Pelo Brazilian Solar Spectroscope (Bss)

2013

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“…To obtain the correct antenna directive gain value, the directive gain value measured using the extended radio source should be multiplied by K. The curves and formulae for the extended source size correction factor versus the ratio of the source size or source HPBW over the antenna HPBW have been developed in [1], [4], [5]. For the case of a Gaussian source and a Gaussian antenna power pattern, [1] and [4] state the following value of K:…”

Section: Introductionmentioning

confidence: 99%

“…For the case of a uniform disk brightness distribution and a Gaussian antenna power pattern, [4] and [5] express K as:…”

Section: Introductionmentioning

confidence: 99%

“…First, the approximations (2) - (4) are based on the shape of the antenna power pattern rather than on the shape of the antenna aperture distribution, which is defined by the aperture illumination function and its taper, not simply from the value of the antenna far field FWHP beamwidth. Secondly, in order to use equations (2) -(4), the antenna FWHP beamwidth as a function of aperture illumination function and its taper needs to be known.…”

Section: Introductionmentioning

confidence: 99%

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