天文数据索引技术综述

发布时间：2018-01-29 00:53

本文关键词： 天文数据索引虚拟天文台射电望远镜　出处：《中国科学:物理学力学天文学》2017年05期 　论文类型：期刊论文

【摘要】：信息技术、制造技术的蓬勃发展为提高射电望远镜灵敏度和分辨率奠定了基础.随着观测设备接收面积的增大及多功能数字终端技术的发展,天文观测设备的数据收集能力也得到了大幅提升,天文数据已经进入了PB量级时代.然而海量的观测数据并非全部实现了全世界范围的开放共享.部分新投入或正在建设中的大型天文观测设备在设计过程中并没有充分考虑到数据管理问题;已有的观测数据采用离线存储在磁盘或磁带上没能实现数字化:发表的文章所用到的数据没有进行有效归档,使他人无法重复数据处理;部分国家或地区的网络限制使科研人员无法在线获取归档数据.本文以目前主流的单天线和阵列射电望远镜为基础,综述各观测设备现状及数据管理相关情况.以虚拟天文台相关协议标准为依据介绍如何通过最新的虚拟天文台(Virtual Observatory,VO)技术实现数据发布及无缝透明的资源连接与访问.分析了目前常用的索引技术B-Tree,R-Tree,HTM,HEALPix,Q3C的特点,最后给出针对新疆奇台110 m射电望远镜数据管理方面可选择的关键技术.
[Abstract]:The rapid development of information technology and manufacturing technology has laid a foundation for improving the sensitivity and resolution of radio telescopes. With the increase of receiving area of observation equipment and the development of multi-function digital terminal technology. The data collection capacity of astronomical observation equipment has also been significantly improved. Astronomical data has entered the age of PB. However, not all of the massive observational data have been open and shared worldwide. Some of the newly invested or under construction large astronomical observation equipment are in the process of being designed. Insufficient consideration of data management issues; The existing observation data were stored offline on disk or tape and could not be digitized: the data used in published articles were not effectively archived, making it impossible for others to repeat data processing; Network restrictions in some countries or regions make it impossible for researchers to obtain archived data online. This paper is based on the current mainstream single antenna and array radio telescopes. This paper summarizes the current situation of observation equipment and data management. Based on the relevant protocol standards of virtual observatory, it introduces how to pass the latest virtual Observatory. VOO technology implements data publishing and seamless and transparent connection and access of resources. This paper analyzes the characteristics of the commonly used index technology B-TreeR- TreeR- HEALPixTc. Finally, the key technology of data management for Xinjiang Qitai 110m radio telescope is presented.
【作者单位】：中国科学院新疆天文台;中国科学院射电天文重点实验室;天津科技大学计算机科学与信息工程学校;
【基金】：国家重点基础研宄发展计划项目(编号:2015CB857100) 国家自然科学基金(编号:U1531125,11503075) 中国科学院青年创新促进会、西部之光项目(编号:XBBS201325);中国科学院天文台站设备更新及重大仪器设备运行专项经费资助天文学科技领域云项目(编号:XXH12503-05-05)
【分类号】：P11
【正文快照】： 1射电望远镜数据情况概述射电望远镜是指观测和研究来自天体电磁辐射的设备,天文学家通过收集射电波的定向天线、放大射电信号的高灵敏度接收机及数字终端系统来收集天体的射电强度、频谱及偏振等信息,进而依据所得到的天体信息进行科学研究.射电望远镜分固定在地面的单口径球

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