FITS变长数组在暗物质卫星数据存储中的应用研究  

Application Research of FITS Variable-Length Arrays in DAMPE Data Storage

作　　者：杨晓艳 石涛[1,2] 李冰 孙小涓[1,2] 卢晓军 Yang Xiaoyan;Shi Tao;Li Bing;Sun Xiaojuan;Lu Xiaojun(Key Laboratory of Technology in Geo-spatial Information Processing and Application System,Chinese Academy of Sciences,Beijing 100190,China;Institute of Electronics,Chinese Academy of Sciences,Beijing 100190,China;China International Engineering Consulting Corporation,Beijing 100048,China)

机构地区：[1]中国科学院空间信息处理与应用系统技术重点实验室,北京100190 [2]中国科学院电子学研究所,北京100190 [3]中国国际工程咨询公司,北京100048

出　　处：《天文研究与技术》2018年第2期176-180,共5页Astronomical Research & Technology

基　　金：中国科学院空间战略性先导专项地面支撑系统数据处理与管理分系统研制项目资助

摘　　要：FITS是空间天文领域广泛使用的一种数据格式,空间天文数据文件通常采用定长数据结构存储为FITS文件。作为我国首颗发射的空间科学卫星,暗物质粒子探测卫星科学数据源包具有长度可变的特点。在暗物质卫星数据处理过程中,急需设计支持可变长度数据的存储结构和处理方法。设计了一种支持长度可变数组的FITS格式,并实现了采用该数据结构的数据处理、存储和管理。应用于暗物质卫星地面处理中,验证结果表明,该方法实现了编辑级产品数据存储,显著降低了产品数据量,节约了存储空间,同时提升了处理效率。FITS(Flexible Image Transport system)is a data format widely used in space astronomy,and astronomical data files are usually stored in a fixed-length data structure as FITS files.As the first space science satellite in our country,DAMPE(Dark Matter Particle Explorer)satellite′s science data source package has the characteristics of variable length.In DAMPE data processing process,it is urgent to design a storage structure and processing method that supports variable length data.In this paper we designed a FITS format that supports variable-length arrays and implemented DAMPE data processing,storage,and management with this data structure.The validation with real data of DAMPE indicated that this method was successfully applied to editing grade products storage of DAMPE,not only significantly reducing the amount of product data,saving storage space,but also improving the speed of data processing.

关 键 词：FITS 变长数据结构 空间天文 暗物质卫星 

分 类 号：P172.2[天文地球—天文学]