您当前的位置: > 详细浏览

面向SKA1时代的科学数据流及阵列模拟分析

Scientific data flow and array simulation analysis for the SKA1 era

摘要:作为下一代射电望远镜,平方公里阵列望远镜(SKA)经过多年的筹备,第一阶段(SKA1) 已经在2021年7月开工建设,SKA1正式运行后预计每年将产生750PB的科学归档数据,这些数据将存储在世界各地的SKA区域中心供科研工作者使用。本文将SKA观测台站、中央信号处理器、科学数据处理及区域中心等各个阶段的模型进行量化分析,以SKA1的高优先级科学观测为主要依据,得出每个阶段的数据流评估情况,以及对科学数据处理算力的需求。以当前SKA1-Low和 SKA1-Mid的阵列为例,总结了包括分辨率、灵敏度、UV覆盖等影响干涉阵列布局的关键因素;最后使用OSKAR进行干涉阵列的数据模拟,通过对SKA1-Mid的模拟得出系统的可扩展性和稳定性,通过对SKA1-Low在CSRC-P上的模拟,可以看出中国SKA区域中心原型机设计经过了充分的论证和优化,并得出了详细的算力需求以及数据量的详细信息。SKA对数据处理、计算、存储等的需求,将需要电子、通信、信息、计算机等技术和交叉学科的联合推动。

英文摘要:After years of planning for the next generation of radio telescopes, the Square Kilometer Array (SKA), the construction of the SKA phase one (SKA1) had started in July 2021.After the formal operation of SKA1, it is expected that 750 petabytes of scientifically processed data will be generated every year. The data will be stored at SKA regional centers around the world for further analysis by researchers.In this paper, the models of SKA observation station, central signal processor, scientific data processing and regional center are quantitatively analyzed. Based on the high-priority scientific observation of SKA1, the data flow evaluation at each stage and the demand for computing power of scientific data processing are obtained. Taking the current SKA1-Low and SKA1-Mid arrays as examples, the key factors affecting the layout of interference arrays including resolution, sensitivity and UV coverage are summarized. Finally, OSKAR is used for data simulation of interference array. Through the simulation of SKA1-Mid, the scalability and stability of the system are obtained. Through the simulation of SKA1-Low on CSRC-P, it can be seen that the design of prototype SKA regional center in China has been fully optimized. And the detailed requirements of computing power and the detailed information of data volume are obtained. The SKA's demand for data processing, computing and storage also requires a combination of technologies and interdisciplinary efforts from areas such as electronics, communication, information technology and computer.

版本历史

[V1] 2022-06-28 16:26:40 chinaXiv:202206.00184V1 下载全文
点击下载全文
同行评议状态
待评议
许可声明
metrics指标
  • 点击量3999
  • 下载量99
评论
分享
邀请专家评阅