Fast Searches for Astronomical Transients Based on Focal-Field Feature Matching
Fast Searches for Astronomical Transients Based on Focal-Field Feature Matching
复制标题
基于焦场特征匹配的天文瞬变快速搜索
DOI:
10.1109/lawp.2019.2894790
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发表时间:
2019-01
影响因子:
4.2
通讯作者:
Yang Shizhong
中科院分区:
文献类型:
--
作者:
Wu Decheng;Cao Hailin;Fan Jin;Chen Zhoujian;Liu Sheng;Tan Xiaoheng;Yang Shizhong
Since fast transients such as fast radio bursts are short-duration events, the telescope should require a wide instantaneous field of view (FoV). Unlike the traditional beam-scanning technology, this letter proposes a new approach for transient radio target detection using focal-field feature matching. Based on the off-axis focusing characteristics of the parabolic antenna reflector, the focal-field distribution (FFD) database is established on the basis of various incident angles and frequencies. Combining the frequency feature of the transients, an improved compressed sensing method using the multiple-frequency joint estimation is proposed. The direction of the transients can be identified through the relationship of the reconstructed index and FFD feature database. Moreover, according to the received energy distribution, a database-selection method is proposed as a preprocessing to reduce the algorithm complexity. A simplified antenna model is used to generate the FFD database. The simulation results demonstrate that this approach can accurately estimate the transient position. In addition, compared with the traditional multibeam scanning system, the proposed method increases the FoV of the radio telescope and can provide an extended detection for transients.
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DOI:
10.3847/1538-4357/acc1e3
发表时间:
2023-05
期刊:
The Astrophysical Journal
影响因子:
--
作者:
M. Głowacki;K. Lee-Waddell;A. Deller;N. Deg;A. Gordon;J. A. Grundy;L. Marnoch;A. Shen;S. Ryder;R. Shannon;O. I. Wong;H. Dénes;B. Koribalski;C. Murugeshan;J. Rhee;T. Westmeier;S. Bhandari;A. Bosma;B. Holwerda;J. Prochaska
通讯作者:
M. Głowacki;K. Lee-Waddell;A. Deller;N. Deg;A. Gordon;J. A. Grundy;L. Marnoch;A. Shen;S. Ryder;R. Shannon;O. I. Wong;H. Dénes;B. Koribalski;C. Murugeshan;J. Rhee;T. Westmeier;S. Bhandari;A. Bosma;B. Holwerda;J. Prochaska
DOI:
10.23919/ursigass.2017.8105320
发表时间:
2017-08
期刊:
2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)
影响因子:
--
作者:
Y. Maan;J. van Leeuwen
通讯作者:
Y. Maan;J. van Leeuwen
影响因子:
5.7
作者:
A. Young;M. Ivashina;R. Maaskant;O. Iupikov;D. Davidson
通讯作者:
A. Young;M. Ivashina;R. Maaskant;O. Iupikov;D. Davidson
影响因子:
5.7
作者:
O. Iupikov;M. Ivashina;N. Skou;C. Cappellin;K. Pontoppidan;C. V. '. van ’t Klooster
通讯作者:
O. Iupikov;M. Ivashina;N. Skou;C. Cappellin;K. Pontoppidan;C. V. '. van ’t Klooster
DOI:
10.3847/2041-8213/aa71ff
发表时间:
2017-05
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
K. Bannister;R. Shannon;J. Macquart;C. Flynn;P. Edwards;M. O’Neill;S. Osłowski;M. Bailes;B. Z
通讯作者:
K. Bannister;R. Shannon;J. Macquart;C. Flynn;P. Edwards;M. O’Neill;S. Osłowski;M. Bailes;B. Z