射电天文研究室知识库

微波全息测量是检测抛物面面形分布的重要手段之一,数据校准软件是全息处理软件中关键的一部分。以新疆天文台南山25 m天线改造计划为背景,在分析全息测量中引起误差的几个因素的基础上,开发了全息测量数据校准软件。该软件以Linux为开发平台,使用Python语言进行编程,其优点是:具有误差评估功能,方便用户筛选由于误差过大造成的数据不合理;标准化接口更易嵌入天线控制软件中;可视化界面既能方便用户操作,又可以直观显示运行结果。软件调试结果显示该软件运行时间在2 min以内,效果良好,具有一定的实用价值,不仅对于25 m的改造至关重要,也为未来110 m射电望远镜的技术预研创造了条件。

Holographic measurement is an important method to detect deformation of a radio-antenna surface from the parabolic shape． A key element of holographic measurement is a data-calibration software package． To serve the plan of transforming the 25m radio antenna in the Nanshan Station of the Xinjiang Astronomical Observatory ( XAO) ，we study contributions of different sources to measurement errors of antenna holography． We further develop a software package for data calibration of holographic measurement by using a Linux operating system as the development platform and the Python as the development language． Our package has several merits． First，it can evaluate reasonableness of errors and filter out data records of excessive errors．This provides convenience for users． Second，it has standardized interfaces that are rather easily to be embedded into the antenna control software． Third，its visual interface is user friendly and can display results visually． Our debugging of the package has shown that it is highly practical and effective． The package not only can have crucial applications in the reconstruction of the 25m antenna，but also can be used to provide technical predictions for the design of the XAO 110m radio telescope．