| 日像仪干涉阵结构优化的加速压力算法 |
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| 作者姓名： | 王书振 颜毅华 寿建军 徐国华 |
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| 作者单位： | 1. 中国科学院国家天文台, 北京 100012;
2. 西安电子科技大学, 西安 710071 |
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| 基金项目： | 中国科学院、科学技术部 973项目 (G2000078403);国家自然科学基金项目 (10225313)资助 |
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| 摘 要： | 提出的加速压力算法是对Boone压力算法在解的质量和收敛速度两方面的改进,通过一次移动天线阵,可以完全消除阵元数目个uv采样点处的残差,使得每次迭代的uv分布修正量最大,从而不仅达到减小计算量的目的,而且使优化结果更加逼近理想模型.通过ALMA阵结构的优化与原有算法做了对比,验证了算法的有效性和高效性.最后,给出了中国国家天文台正在建设的日像仪干涉阵结构的仿真结果
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| 关 键 词： | 日像仪 干涉阵 天线阵排列 加速压力算法 |
| 收稿时间： | 2004-05-24 |
| 修稿时间： | 2004-09-27 |
Accelerated Pressure Algorithm for Interferometric Array Configuration |
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| Authors: | WANG Shu-Zhen YAN Yi-Hua SHOU Jian-Jun XU Guo-Hua |
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| Institution: | 1. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;
2. Xidian University, Xi’an 710071, China |
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| Abstract: | The accelerated pressure algorithm, which would improve the Boone pressure algorithm in solution and convergence, can eliminate the top Na uv distribution dispersions of sampling points by moving the array; where Na is the number of antenna in array, namely it can amend the uv distribution maximally in an iterat ive evolut ion, hence the result is as close as possible. The comparison between APA and pressure algorithm showed its validity and high efficiency by the ALMA array configuration. Finally, the simulation-based model of Gaussian distribution is conducted on interferometric array configuration constructing by the national astronomical observatory. |
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| Keywords: | heliography interferometric array array conf igurat ion accelerated pressure algorithm |
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