XAO OpenIR  > 射电天文研究室  > 脉冲星研究团组
乌鲁木齐天文站建立脉冲星相干消色散观测系统
Alternative TitlePulsar Coherent De-dispersion System on the Urumqi Observatory
刘立勇1,2; 艾力•伊沙木丁1; 张晋1
2007
Source Publication天文研究与技术
ISSN1672-7673
Volume4Issue:1Pages:72-78
Contribution Rank1
Abstract脉冲星发射的辐射信号经过星际介质到达观测天线的过程中,存在色散效应.该效应导致有一定带宽脉冲信号的不同频率成份到达天线时间有延迟,影响对脉冲星的观测.消色散技术是脉冲星观测的关键技术,它对脉冲星观测系统的灵敏度和观测精度至关重要.脉冲星相干消色散过程是:通过对观测信号进行Nyquist采样,对采样数据做傅立叶变换,变换后的频域信号与星际介质Chirp函数乘积,然后再做逆傅立叶变换回时域,得到消色散后的时域信号.乌鲁木齐天文站依托现有的南山25m射电望远镜和VLBI记录终端MK5A系统,自行开发的相干消色散处理软件(Linux操作系统下C语言调用MPI库)和4节点机群系统,建立了脉冲星相干消色散观测系统.
Other AbstractPulsar coherent de-dispersion experiment was carried out by using the 25m Nanshan radio telescope in the Urumqi Observatory. It uses a dual polarization receiver operating at 18cm and a VLBI back-end, Mark5A. The data processing system is based on a C program on the Linux and a 4-node Beowulf cluster. A high quality data acquisition system and a cluster with more processors are needed to build an online pulsar coherent de-dispersion system in the future.
Keyword天文仪器 脉冲星 相干消色散 并行计算 机群 Mk5a
Subject Area致密天体、高能和基础物理
URL查看原文
Indexed ByCSCD
Language中文
Funding Project脉冲星研究团组
Funding Organization国家自然科学基金 ; 中科院
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/57
Collection射电天文研究室_脉冲星研究团组
中国科学院新疆天文台
光学天文与技术应用研究室
研究生学位论文
Corresponding Author刘立勇
Affiliation1.中国科学院国家天文台乌鲁木齐天文站,新疆乌鲁木齐830011
2.中国科学院研究生院,北京100049
First Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Corresponding Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
刘立勇,艾力•伊沙木丁,张晋. 乌鲁木齐天文站建立脉冲星相干消色散观测系统[J]. 天文研究与技术,2007,4(1):72-78.
APA 刘立勇,艾力•伊沙木丁,&张晋.(2007).乌鲁木齐天文站建立脉冲星相干消色散观测系统.天文研究与技术,4(1),72-78.
MLA 刘立勇,et al."乌鲁木齐天文站建立脉冲星相干消色散观测系统".天文研究与技术 4.1(2007):72-78.
Files in This Item:
File Name/Size DocType Version Access License
乌鲁木齐天文站建立脉冲星相干消色散观测系(300KB)期刊论文出版稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[刘立勇]'s Articles
[艾力•伊沙木丁]'s Articles
[张晋]'s Articles
Baidu academic
Similar articles in Baidu academic
[刘立勇]'s Articles
[艾力•伊沙木丁]'s Articles
[张晋]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[刘立勇]'s Articles
[艾力•伊沙木丁]'s Articles
[张晋]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 乌鲁木齐天文站建立脉冲星相干消色散观测系统.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.