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张志嵩, 张海燕, 朱岩, 金乘进, 张同杰, 李菂, 朱丽春. 基于FAST望远镜的地外文明共时观测[J]. 深空探测学报(中英文), 2020, 7(2): 158-163. DOI: 10.15982/j.issn.2095-7777.2020.20190618005
引用本文: 张志嵩, 张海燕, 朱岩, 金乘进, 张同杰, 李菂, 朱丽春. 基于FAST望远镜的地外文明共时观测[J]. 深空探测学报(中英文), 2020, 7(2): 158-163. DOI: 10.15982/j.issn.2095-7777.2020.20190618005
ZHANG Zhisong, ZHANG Haiyan, ZHU Yan, JIN Chengjin, ZHANG Tongjie, LI Di, ZHU Lichun. Commensal Observation of SETI at FAST[J]. Journal of Deep Space Exploration, 2020, 7(2): 158-163. DOI: 10.15982/j.issn.2095-7777.2020.20190618005
Citation: ZHANG Zhisong, ZHANG Haiyan, ZHU Yan, JIN Chengjin, ZHANG Tongjie, LI Di, ZHU Lichun. Commensal Observation of SETI at FAST[J]. Journal of Deep Space Exploration, 2020, 7(2): 158-163. DOI: 10.15982/j.issn.2095-7777.2020.20190618005

基于FAST望远镜的地外文明共时观测

Commensal Observation of SETI at FAST

  • 摘要: 地外文明搜寻(Search for Extra Terrestrial Intelligence,SETI)是射电天文的重要子领域。为了获得尽可能多的观测时间,SETI采用共时观测(Commensal Survey),即不单独占用望远镜时间,在望远镜进行其他观测任务的同时进行SETI信号的搜寻。介绍了SETI共时观测的概念以及SETI后端的整体框架,分析了SETI共时观测的主要策略;对实时数据接收系统SERENDIP进行了分析说明;同时分析了数据去射电干扰和候选目标提取方法;通过对500 m口径球面射电望远镜(Five-hundred-meter Aperture Spherical radio Telescope,FAST)的5 h漂移扫描数据处理,验证了SETI后端的有效性。最后对SETI的未来发展趋势进行了展望:FAST的高灵敏度不仅是对其它望远镜针对该项目观测数据的有效验证,更增加了探测到微弱地外文明信号的可能性。

     

    Abstract: Search for Extra Terrestrial Intelligence (SETI) is an important subdomains in radio astronomy. In order to obtain as much observation time as possible, SETI adopts the Commensal Survey which does not occupy the telescope's time alone, searching for SETI signals while the telescope performs other observation tasks. In this paper, the concept of SETI commensal observation and the overall framework of SETI backend are introduce, and the main strategies of SETI commensal observation are analyzed. The real-time data receiving system SERENDIP ia analyzed and explained. At the same time, radio frequency interference (RFI) removal and candidate target extraction methods are analyzed. The validity of SETI backend is verified by processing FAST's 5-hour drift scan data. Finally, the future development trend of SETI is prospected. The high sensitivity of the 500 meter aperture spherical telescope (FAST) makes this project not only an effective verification of other telescope observation data, but also increases the possibility of detecting weak extraterrestrial signals.

     

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