Characterization of a Low-Frequency Radio Astronomy Prototype Array in Western Australia
Characterization of a Low-Frequency Radio Astronomy Prototype Array in Western Australia
复制标题
西澳大利亚低频射电天文学原型阵列的表征
DOI:
10.1109/tap.2015.2487504
复制
发表时间:
2015
影响因子:
5.7
通讯作者:
J. B. D. Vaate
中科院分区:
文献类型:
--
作者:
A. Sutinjo;T. Colegate;R. Wayth;P. Hall;E. D. L. Acedo;T. Booler;A. Faulkner;Lu Feng;N. Hurley;B. Juswardy;S. Padhi;N. Razavi;M. Sokołowski;S. Tingay;J. B. D. Vaate
We report characterization results for an engineering prototype of a next-generation low-frequency radio astronomy array. This prototype, which we refer to as the Aperture Array Verification System 0.5 (AAVS0.5), is a sparse pseudorandom array of 16 log-periodic antennas designed for 70-450 MHz. It is colocated with the Murchison widefield array (MWA) at the Murchison radioastronomy observatory (MRO) near the Australian square kilometre array (SKA) core site. We characterize the AAVS0.5 using two methods: in situ radio interferometry with astronomical sources and an engineering approach based on detailed full-wave simulation. In situ measurement of the small prototype array is challenging due to the dominance of the Galactic noise and the relatively weaker calibration sources easily accessible in the southern sky. The MWA, with its 128 “tiles” and up to 3 km baselines, enabled in situ measurement via radio interferometry. We present array sensitivity and beam pattern characterization results and compare to detailed full-wave simulation. We discuss areas where differences between the two methods exist and offer possibilities for improvement. Our work demonstrates the value of the dual astronomy-simulation approach in upcoming SKA design work.
DOI:
10.1109/eucap.2012.6206593
发表时间:
2012
期刊:
--
影响因子:
--
作者:
De Lera Acedo E
通讯作者:
De Lera Acedo E
影响因子:
6.5
作者:
van Haarlem, M. P.;Wise, M. W.;van Zwieten, J.
通讯作者:
van Zwieten, J.