新疆天文台脉冲星数据发布关键技术研究

项目名称： 新疆天文台脉冲星数据发布关键技术研究

项目编号： No.U1531125

项目类型： 联合基金项目

立项/批准年度： 2016

项目学科： 天文学、地球科学

项目作者： 张海龙

作者单位： 中国科学院新疆天文台

项目金额： 46万元

中文摘要： 经过近二十年观测，新疆天文台积累了大量脉冲星到达时间等相关数据。如何高效管理海量快速增长的脉冲星数据、如何实现未来更大口径望远镜产生的海量数据的快速发布是目前新疆天文台急需解决的问题。项目主要研究脉冲星数据的发布问题，首先对海量脉冲星数据采用分层管理方法，构建多层次数据存储模型，对海量的原始数据进行不同层次的抽取，形成多层次数据。在脉冲星归档数据的基础上，建立脉冲星数据锥形检索服务及多约束检索。针对数据分析及处理的需要在检索结果返回的同时对数据进行预处理，显示脉冲星的脉冲轮廓信息、各通道信息、子积分信息，方便科研人员对数据质量进行预评估。采用并行计算技术提高检索与脉冲轮廓的返回速度，最终使百万量级的数据检索返回时间在几秒之内。

中文关键词： 脉冲星；数据库；数据发布；查询；虚拟天文台

英文摘要： Xinjiang Astronomical Observatory has accumulated a large number of pulsar timing data after the observation of nearly 20 years. How to efficiently manage the massive pulsar observation data in explosive growth, as well as rapidly releasing the huge amounts of data generated by the larger telescopes are urgent problems that need to be resolved. The main purpose of this project is using the hierarchical management methods to solve the problem of massive pulsar data management and publishing. Data servers deal with the raw data obtained from telescopes based on a predefined integration strategy, extracting the different levels of raw data stack from the mass data, forming a multi-level data set, and construct an object database and data warehouse management system.This project will develop a data retrieval and query system of our massive pulsar data based on the standards of virtual observatory and archived pulsar data. And establish a cone search service and a service with multi-constrains condition retrival. Aiming at the need of data analysis and processing,preprocessing the retrieval results and display the Pulse Profile at the same time. Improving the efficiency of data retrieval by adopting the parallel computing method and eventually make the scale of tens of millions of data retrieval returns within a few seconds.

英文关键词： pulsar;database;data release;query;virtual observatory