摘要
介绍中国频谱日像仪(Chinese Spectral Radioheliograph,CSRH)天线阵排列的研究工作。根据CSRH观测目标,给出了在UV平面优化设计的性能指标。最后通过对螺旋阵参数的优化,根据洁化处理的图像质量决定了中国频谱日像仪天线阵列的设计方案。
The Chinese Spectral RadioHeliograph（CSRH） has two arrays,CSRH-I and CSRH-II.There are 40 and 60 antennas in CSRH-I and CSRH-II,respectively.The shape of antenna array is important to image the sun with interferometry,especially for the CSRH.This paper describes certain analysis and simulations of the array configuration for the CSRH.Several potential configurations are considered,such as the cross shape,Y-shape,spiral shape,and random shape.We selected some parameters to evaluate these configurations according to simulations of solar observations.These include the uniformity in UV coverage,BEAM size,BEAM shape,maximal sidelobe,sidelobe RMS of BEAM,quality of cleaned maps in the UV plane and BEAM domain.Furthermore,costs of construction for these shapes must be considered,because this antenna array would be built in the Inner Mongolia and the optical fibers will be buried in a 3-meter depth.Based on these parameters and quality of cleaned maps,we conclude that the three-arm spiral shape is the best configuration for the CSRH.
出处
《天文研究与技术》
CSCD
2013年第1期17-21,共5页
Astronomical Research & Technology
基金
国家自然科学基金(10921303
11003028)
国家重点基础研究发展计划"973"项目(2011CB811401)
国家重大科研装备研制项目(ZDYZ2009-3)资助
关键词
阵列设计
UV覆盖
螺旋阵
洁化
Array Configuration
UV Coverage
Spiral shape
Clean
