天文观测数据是天文研究的基础,但传统的集中式数据检索方法已难以满足日益增长的海量天文数据的高性能检索和查询需求.提出了一种基于Elastic Search分布式搜索引擎,通过River机制对现有的海量FITS(Flexible Image Transport System)...天文观测数据是天文研究的基础,但传统的集中式数据检索方法已难以满足日益增长的海量天文数据的高性能检索和查询需求.提出了一种基于Elastic Search分布式搜索引擎,通过River机制对现有的海量FITS(Flexible Image Transport System)数据进行索引构建,从而实现海量FITS数据高效检索的方法,并讨论了其中的近实时检索和查询的关键技术.实测结果表明,在百万到千万级的天文数据量下,该方法可获得极高的检索性能,并能够很方便地集成到现有的天文数据归档系统中,完全可以满足当前国内各类望远镜系统天文数据的归档要求.展开更多
With excellent seeing conditions,ultra-low infrared background noise,high frequency of space debris transits,and continuous polar night coverage,Dome A in Antarctica has become an ideal platform for ground-based astro...With excellent seeing conditions,ultra-low infrared background noise,high frequency of space debris transits,and continuous polar night coverage,Dome A in Antarctica has become an ideal platform for ground-based astronomy and space situational monitoring.As a crucial observatory site for international deep space,deep Earth,deep sea,and polar exploration,it is very important to evaluate the suitability of Dome A as an observatory site.However,owing to extreme environmental constraints,the evaluation of site conditions is mainly based on single-point measurements,making it challenging to comprehensively evaluate the effective site range and uniformity.This study integrated satellite remote sensing data to develop a cross-comparison framework for diverse indicators across Dome A,to evaluate its spatial uniformity.We find that the area surrounding the Dome A site,defined within a roughly 1°×1°latitude and longitude range,possesses excellent astronomical observation conditions.展开更多
文摘天文观测数据是天文研究的基础,但传统的集中式数据检索方法已难以满足日益增长的海量天文数据的高性能检索和查询需求.提出了一种基于Elastic Search分布式搜索引擎,通过River机制对现有的海量FITS(Flexible Image Transport System)数据进行索引构建,从而实现海量FITS数据高效检索的方法,并讨论了其中的近实时检索和查询的关键技术.实测结果表明,在百万到千万级的天文数据量下,该方法可获得极高的检索性能,并能够很方便地集成到现有的天文数据归档系统中,完全可以满足当前国内各类望远镜系统天文数据的归档要求.
基金supported by the Space Debris Research Project,China(KJSP2020010102)the National Key R&D Program of China(2022YFC2807300).
文摘With excellent seeing conditions,ultra-low infrared background noise,high frequency of space debris transits,and continuous polar night coverage,Dome A in Antarctica has become an ideal platform for ground-based astronomy and space situational monitoring.As a crucial observatory site for international deep space,deep Earth,deep sea,and polar exploration,it is very important to evaluate the suitability of Dome A as an observatory site.However,owing to extreme environmental constraints,the evaluation of site conditions is mainly based on single-point measurements,making it challenging to comprehensively evaluate the effective site range and uniformity.This study integrated satellite remote sensing data to develop a cross-comparison framework for diverse indicators across Dome A,to evaluate its spatial uniformity.We find that the area surrounding the Dome A site,defined within a roughly 1°×1°latitude and longitude range,possesses excellent astronomical observation conditions.
