Abstract

The paper presents results of calculating the RATAN-600 beam pattern (BP) and BP drift scans of point radio sources in the West Sector radio telescope operation mode at a frequency of 4.7 GHz. When calculating the BP, the properties of the radio telescope antenna system in this operation mode were taken into account: the use of a large secondary mirror, asymmetric radiation of the primary mirror, and the location of the primary feeds (feed horns) along the focal line of the secondary mirror. The shape of the calculated drift scans of sources through the BP is compared with that of the experimental drift scans of sources obtained from observations in the West Sector. The main characteristics of the drift scans are calculated and compared when the radio telescope operates with the West and North Sectors. A new method for determination of flux densities of sources passing through the BP outside its central cross-section is proposed, and its accuracy is estimated.

中文翻译：

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RATAN-600 西区射电望远镜操作模式下射电源的波束方向图和漂移扫描

摘要

本文介绍了在西区射电望远镜操作模式下、频率为 4.7 GHz 的点射电源的 RATAN-600 波束方向图 (BP) 和 BP 漂移扫描的计算结果。在计算BP时，考虑了射电望远镜天线系统在该工作模式下的特性：使用大副镜、主镜的非对称辐射以及主馈源（馈源喇叭）沿天线方向的位置。次镜的焦线。将计算出的通过BP的源漂移扫描的形状与从西段观测获得的源的实验漂移扫描的形状进行比较。计算并比较了射电望远镜在西区和北区运行时漂移扫描的主要特征。提出了一种确定穿过BP中心截面外的源通量密度的新方法，并对其精度进行了估计。