射电天文研究室知识库

为获取乌鲁木齐25m天线轨道的变形状况以及轨道变形对天线指向的影响,采用精密水准测量和水平测量方法,精确测量了轨道面高程与指向偏差,分析了两种数据的相关性,并给出了天线指向偏差模型。从模型对实测数据的拟合情况来看,所建模型很好地反映了天线指向偏差。

For the purpose of getting track deformation of the 25 m antenna in Urumqi and the effect of track deformation on antenna pointing, two methods are proposed in this paper. One is utilizing a delicate digital level to measure the deformation of the track elevation, and the other is using a frame-typed level to measure the pointing error. The correlation of the actual measured data with two methods is analyzed and the pointing error model is presented. The measurement data is fitted by least-squared model, and the results show that the model reflects the pointing error well.