منابع مشابه
Low-Frequency Model for Radio-Frequency Absorbers
A simple model is developed to characterize the behavior of radio-frequency absorbers at low frequency. The absorber is represented by a flat, homogeneous, isotropic slab of lossy material, with effective constitutive parameters. These parameters are determined by a fit to measured data. Excellent fits are obtained in the two applications considered. The model is intended for use in the charact...
متن کاملHigh-resolution radio study of SNR IC 443 at low radio frequencies
Aims. We investigate the morphology at low radio frequencies of the supernova remnant (SNR) IC 443 in detail and accurately establish its radio continuum spectral properties. Methods. We used the VLA in multiple configurations to produce high-resolution radio images of IC 443 at 74 and 330 MHz. From these data we produced the first sensitive, spatially resolved spectral analysis of the radio em...
متن کاملLow Frequency Radio Observations Of W51 Complex
W51 is a giant radio complex lying along the tangent to the Saggitarius arm at a distance of about 7kpc from Sun, with an extension of about 1◦ in the sky. It is divided into three components A,B,C where W51A and W51B are regions consisting of many compact HII sources.We have made continuum radio observations of these HII regions of W51 complex at 240,610,1060,1400 MHz frequencies using GMRT. T...
متن کاملSuppression of Radio Frequency Interference in Low Frequency SAR
To acquire high resolution in airborne radar imaging, either minuscule wavelengths or incredibly large antennas must be used. Another way of solving that issue is to utilise moving radar to realise the effect of a large aperture; a technique called synthetic aperture radar (SAR). CARABAS is a low frequency SAR system, operating in the band of 20 – 90 MHz, designed to minimise the influence from...
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 کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2017
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921317004689