Investigation of stronger diurnal ERP signals in summer derived from the VLBI CONT08 campaign  

作　　者：SUN Jing DAI ChunLi JIAN NianChuan ZHOU YongHong WANG GuangLi PING JinSong 

机构地区：[1]Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China [2]Beijing Aerospace Control Centre, Beijing 100094, China

出　　处：《Chinese Science Bulletin》2010年第29期3274-3278,共5页

基　　金：supported by the National Natural Science Foundation of China (10973031);National High-Tech Research and Development Program of China (2008AA12A210);100 Talents Program of the Chinese Academy of Sciences

摘　　要：A series of very successful Continuous Very Long Baseline Interferometry Campaigns(CONT) have been carried out at irregular intervals since 1994.One of the goals is to support high-resolution earth rotation studies.The most recent CONT08 campaign was conducted with a network of 11 observatories at an increased recording rate of 512 Mbit per second over a fortnightly time span,from which stronger diurnal variations of the Earth Rotation Parameters(ERP) have been detected.We compared the high-frequency ERP from VLBI and GPS observations during CONT02,CONT05 and CONT08 with the atmospheric angular momentum functions derived from the National Centers for Environmental Prediction/National Center for Atmospheric(NCEP/NCAR) during these periods.We attribute the detected diurnal discrepancies between the theoretical models and the CONT08 observations to atmospheric excitations.A series of very successful Continuous Very Long Baseline Interferometry Campaigns （CONT） have been carried out at irregular intervals since 1994. One of the goals is to support high-resolution earth rotation studies, The most recent CONT08 campaign was conducted with a network of 11 observatories at an increased recording rate of 512 Mbit per second over a fortnightly time span, from which stronger diurnal variations of the Earth Rotation Parameters （ERP） have been detected. We compared the high-frequency ERP from VLBI and GPS observations during CONT02, CONT05 and CONT08 with the atmospheric angular momentum functions derived from the National Centers for Environmental Prediction/National Center for Atmospheric （NCEP/NCAR） during these periods. We attribute the detected diurnal discrepancies between the theoretical models and the CONT08 observations to atmospheric excitations.

关 键 词：VLBI观测 ERP系统 昼夜差异 运动 甚长基线干涉测量 地球自转参数 大气角动量 信号 

分 类 号：P228.6[天文地球—大地测量学与测量工程] TP311.1[天文地球—测绘科学与技术]