国家重点研发计划“SKA前期数据处理系统建设和相关科学预研”简介

The Introduction of National Key Research and Development Program “The Early Science Data Process System and Pre-Research of SKA Project”

在继承平方公里阵列(Square Kilometre Array,SKA)望远镜的中国低频探路者——"宇宙第一缕曙光"探测项目21CMA在十年间所积累的经验和广泛国际合作的基础上,计划小规模改造现有设备,迅速掌握数字多波束合成、高动态大视场成像、前景去除等SKA低频成像的关键核心技术。同时,与SKA低频阵(SKA-low)先导设备MWA(Murchison Widefield Array)开展深层次合作,预选未来用于SKA1-low宇宙再电离深度成像的观测候选区域,为最终利用SKA第一阶段(SKA1)低频阵列,对选定观测候选区域进行深度定点观测做好充分准备,最终实现SKA1既定的首要科学目标。该项目还将建设中国SKA区域中心数据处理原型样机,并以21CMA和MWA实测数据为基础,完成低频射电干涉成像的数据处理流程,为建设中国SKA区域数据中心打下基础。

On the basis of more than 10 years of operational experience of 21CMA,the SKA low-frequency path nder built in northwest of China dedicate for Epoch of Reioniza-tion(EoR)exploration,and extensive international cooperation on SKA project,the present program plans to make small-scale reformation of the existing 21CMA equipment in order to quickly grasp digital multi-beam forming,high-dynamic-range wide- eld imaging,and EoR foreground removal techniques.In-depth cooperation with SKA-low precursor,the Murchi-son Wide eld Array(MWA)is highly desirable in science and related technique.One of the major on-going tasks is preliminarily selecting the sky zones for deep imaging and for future EoR observation.This will eventually used as the targeted sky zones of the SKA phase one(SKA1)low frequency array in the Cosmic dawn and EoR research,with ultimate goal of achieving the SKA key science objectives.A prototype of China SKA Regional Center data processor will be designed and constructed.The low-frequency synthesis imaging pipeline will be developed.All these pioneer work will pave the road toward the China SKA Regional Center.