via GPS Observations
-
摘要: 根据VLBI天线旋转状态进行参数化建模以实现天线监测的理念日益受到重视,有望进行全天候、全自动监测而不影响望远镜的正常观测运行时间。为考察原理可行性,设计监测方案和开发资料处理软件,本文在观测方程构建、解算参数设置和约束条件选取等方面提出了新的见解,对利用GPS数据监测VLBI天线进行了仿真分析。Abstract: It is been an important topic in the field of astrometry and geodesy to monitor thereference point and axis offsets of VLBI antenna with high precision.The common monito-ring method is based on some special restrictions to the rotation mode of antenna,which ab-sorbs much of the effective time during operation of the telescope.Monitoring is also subjectto meteorological conditions,and so there are limitations in the actual precision and timeli-ness of such monitoring.In recent years,the concept of VLBI antenna monitoring based onparameterized modeling of the antenna rotation has gradually become more acceptable,and isexpected to perform all-weather and fully automatic monitoring of the antenna without anyinterruption of normal operation of the telescope.In order to investigate the feasibility of thisconcept when designing monitoring procedures and to develop data processing software,some insights and analysis concerning the observation equation,the settings of unknown pa-rameters and the application of constraint conditions are presented.A simulation analysis ofthe VLBI antenna monitoring using GPS data and some preliminary conclusions are given forcriticism and reference for readers.
-
Keywords:
- VLBI /
- reference point /
- axis offset /
- GPS /
- simulation analysis
-
计量
- 文章访问数: 1038
- HTML全文浏览量: 54
- PDF下载量: 414
下载:
