摘要
我国自行研制的第一套流动VLBI系统DCW 0 1型流动VLBI测量仪 ,目前已在国家重大科学工程“中国地壳运动观测网络”中投入使用。在流动VLBI的观测试验中 ,天线系统噪声温度和天线效率是观测前系统调试和检测的两项重要内容。天线系统噪声温度是衡量流动VLBI观测系统内部噪声程度的特性指标 ;天线效率反映了天线系统对到达天线能量的利用率 ,在很多计算公式中是一个很重要的参数。因此 ,精确地测量它们的值是进行相关处理和计算的前提。文中结合我国流动VLBI观测站的研制与建设 ,介绍了流动VLBI测量仪的天线及接收机系统 。
The first mobile VLBI system in China has been successfully manufactured and used in crustal movement observation network of China at present. Antenna system noise temperature and antenna efficiency are the most important items in the system debugging and checking before the VLBI observation. Combining with the manufacture and construction of the mobile VLBI station, the paper introduces the actenna and receiver system and presents a detailed depiction on the measurement of the antenna system noise temperature and antenna efficiency.
出处
《测绘学院学报》
北大核心
2004年第1期14-16,20,共4页
Journal of Institute of Surveying and Mapping
