我国新一代VLBI网建设现状与展望  

Status and prospects of Chinese new-generation VLBI network

作　　者：孙中苗[1,2] 李金岭 范昊鹏[4] 柳聪 SUN Zhongmiao;LI Jinling;FAN Haopeng;LIU Cong(Xi'an Research Institute of Surveying and Mapping,Xi'an 710054,China;State Key Laboratory of Geo-Information Engineering,Xi'an 710054,China;Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China;Information Engineering University,Zhengzhou 450001,China)

机构地区：[1]西安测绘研究所,陕西西安710054 [2]地理信息工程国家重点实验室,陕西西安710054 [3]中国科学院上海天文台,上海200030 [4]战略支援部队信息工程大学,河南郑州450001

出　　处：《测绘科学与工程》2020年第2期1-8,共8页Geomatics Science and Engineering

摘　　要：我国新一代VLBI网(CNVN)于2015年启动实质性建设。简要回顾了根据地球定向参数测定需求设计的CNVN,其由可以构成较长东西基线和南北基线、且覆盖面积尽可能广的4~6个测站组成。参照VLBI全球观测系统(VGOS)建设规范,对我国VGOS测站的设计要求作了扼要介绍。重点分析了上海余山VGOS试验站的建设现状,包括宽频馈源、低温致冷接收机、上下变频系统、后端系统及系统测试情况,表明该测站目前运行情况良好,相关性能指标达到设计要求。最后从最简测网的联调联试、与传统CVN的组网观测、参加国际VGOS联测、拓展CNVN规模和自动化运行等方面展望了下一步工作,提出了运行和维护的若干建议。The new generation of Chinese VLBI network(CNVN)was constructed in 2015.In this paper,the CNVN designed according to the requirements of Earth orientation parameters(EOP)determination is briefly reviewed.The CNVN consists of four to six stations which cover an area as wide as possible and can form long east-west baseline and south-north baseline.With reference to the VLBI Global Observation System(VGOS)specifications,the design requirements of CNVN are briefly introduced.This paper focuses on the analysis of the construction status of Shanghai Sheshan VGOS test station,including broadband feed source,cryogenic receiver,up-down conversion system,back-end system and whole system test.It shows that the test station is running well at present,and the relevant performance indexes meet the design requirements.Finally,the future work are designed from aspects of joint commissioning,the simplest measurement network test,network observation with traditional CVN,participation in international VGOS joint measurement,expansion of CNVN coverage and automatic operation.Some suggestions for operation and maintenance are put forward.

关 键 词：甚长基线干涉测量 地球定向参数 VLBI全球观测系统 宽频馈源 低温致冷宽频接收机 干涉条纹 

分 类 号：P228[天文地球—大地测量学与测量工程]