摘要
首先简要介绍同波束干涉测量技术,随后叙述中国科学院国家天文台乌鲁木齐天文站在2008年成功完成了约200 h日本月球卫星SELENE同波束较差甚长基线干涉测量,并阐述乌站在此次VLBI中的作用。给出利用SELENE的观测数据,分析、解算出乌站25 m天线与日本VERA网相关台站基线Rstar、Vstar的S1、S2、S3、X频段的较差相关相位、较差相关相位残差,以及对各频段的较差相关相位、较差相关相位残差比对,最后获得较差相位时延。结果显示,同波束甚长基线干涉测量比传统VLBI观测得到的群时延精度提高了1～2个量级。
During 2008 and 2009,UAO successfully accomplished more than 200 hours observation time in SELenological and Engineering Explore（SELENE）,a Japanese Lunar orbiter.The VLBI observation in SELENE is adopted a method called Same Beam Interferometry（SBI）,wh- ich has advantages in calibration the influence of atmosphere,ionosphere and noise from antenna and receiver,so as to determine a high accuracy in correlation phase and the Differential Phase Delay（DPD）. In this article,a large number of observation data received by UAO from SELENE are processed, correlation phase and DPD are calculated in 5-band and X-band signal.The residuals show a better RMS（root mean square） than traditional VLBI results,and nearly two-order improvement is achieved.In the future,Same Beam Interferometry will be used widely in China＇s forthcoming deep space missions,such as Chang＇e-3 lunar mission and Yinghuo-1 Martian mission.Urumqi Astronomical Observatory will make a significant effort in orbit determination and other scientific applications.
出处
《天文学进展》
CSCD
北大核心
2010年第4期424-432,共9页
Progress In Astronomy
基金
国家自然科学基金资助项目(10973031)
863计划(2008AA12A210)
萤火探测工程VLBI测轨系统
