Improved sensitivity for space domain awareness observations with the murchison widefield array
文献类型：期刊论文
| 作者 | Prabu, S.1,4; Hancock, P.2; Zhang, X.3,5; Tingay, S. J.1; Hodgson, T.1,2; Crosse, B.1; Johnston-Hollitt, M.2 |
| 刊名 | ADVANCES IN SPACE RESEARCH
 |
| 出版日期 | 2022-08-01 |
| 卷号 | 70期号:3页码:812-824 |
| 关键词 | Instrumentation Interferometers - planets and satellites General - radio continuum Transients - techniques Radar astronomy |
| ISSN号 | 0273-1177 |
| DOI | 10.1016/j.asr.2022.05.013 |
| 英文摘要 | Our previously reported survey of the Low Earth Orbit (LEO) environment using the Murchison Widefield Array (MWA) detected over 70 unique Resident Space Objects (RSOs) over multiple passes, from 20 h of observations in passive radar mode. In this paper, we extend this work by demonstrating two methods that improve the detection sensitivity of the system. The first method, called shift-stacking, increases the statistical significance of faint RSO signals through the spatially coherent integration of the reflected signal along the RSO's trajectory across the sky. This method was tested on the observations used during our previous blind survey, and we obtained a 75% increase in the total number of detections. The second method re-focuses the MWA to the near-field RSO's position (post-observation), by applying a complex phase correction to each visibility to account for the curved wave-front. The method was tested successfully on an MWA extended array observation of an ISS pass. However, the method is currently limited by signal decoherence on the long-baselines (due to the hardware constraints of the current correlator). We discuss the sensitivity improvement for RSO detections we expect from the MWA Phase 3 correlator upgrade. We conclude the paper by briefly commenting on future dedicated Space Domain Awareness (SDA) systems that will incorporate MWA technologies. (C) 2022 Published by Elsevier B.V. on behalf of COSPAR. |
| WOS关键词 | FREQUENCY ; ALGORITHM |
| 资助项目 | Australian Government (NCRIS) ; Western Australian Government ; Australian Government ; Innovation Central Perth ; Cisco ; Curtin University ; Woodside ; CSIRO's Data61 |
| WOS研究方向 | Engineering ; Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000833000100007 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | Australian Government (NCRIS) ; Australian Government (NCRIS) ; Western Australian Government ; Western Australian Government ; Australian Government ; Australian Government ; Innovation Central Perth ; Innovation Central Perth ; Cisco ; Cisco ; Curtin University ; Curtin University ; Woodside ; Woodside ; CSIRO's Data61 ; CSIRO's Data61 ; Australian Government (NCRIS) ; Australian Government (NCRIS) ; Western Australian Government ; Western Australian Government ; Australian Government ; Australian Government ; Innovation Central Perth ; Innovation Central Perth ; Cisco ; Cisco ; Curtin University ; Curtin University ; Woodside ; Woodside ; CSIRO's Data61 ; CSIRO's Data61 ; Australian Government (NCRIS) ; Australian Government (NCRIS) ; Western Australian Government ; Western Australian Government ; Australian Government ; Australian Government ; Innovation Central Perth ; Innovation Central Perth ; Cisco ; Cisco ; Curtin University ; Curtin University ; Woodside ; Woodside ; CSIRO's Data61 ; CSIRO's Data61 ; Australian Government (NCRIS) ; Australian Government (NCRIS) ; Western Australian Government ; Western Australian Government ; Australian Government ; Australian Government ; Innovation Central Perth ; Innovation Central Perth ; Cisco ; Cisco ; Curtin University ; Curtin University ; Woodside ; Woodside ; CSIRO's Data61 ; CSIRO's Data61 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/87726]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Prabu, S. |
| 作者单位 | 1.Curtin Univ, Int Ctr Radio Astron Res, Bentley, WA 6102, Australia 2.Curtin Univ, Curtin Inst Computat, GPO Box U1987, Perth, WA 6845, Australia 3.CSIRO Space & Astron, 26 Dick Perry Ave, Kensington, WA 6151, Australia 4.CSIRO Space & Astron, Corner Vimiera & Pembroke Rd, Marsfield, NSW 2122, Australia 5.Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Prabu, S.,Hancock, P.,Zhang, X.,et al. Improved sensitivity for space domain awareness observations with the murchison widefield array[J]. ADVANCES IN SPACE RESEARCH,2022,70(3):812-824. |
| APA | Prabu, S..,Hancock, P..,Zhang, X..,Tingay, S. J..,Hodgson, T..,...&Johnston-Hollitt, M..(2022).Improved sensitivity for space domain awareness observations with the murchison widefield array.ADVANCES IN SPACE RESEARCH,70(3),812-824. |
| MLA | Prabu, S.,et al."Improved sensitivity for space domain awareness observations with the murchison widefield array".ADVANCES IN SPACE RESEARCH 70.3(2022):812-824. |
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来源：国家天文台
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