空间技术测定地壳运动的相互比较  

Comparison of Crustal Motion by Space Geodetic Technologies

作　　者：朱新慧[1] 孙付平[1] 乔书波[1] 

机构地区：[1]信息工程大学测绘学院,河南郑州450052

出　　处：《测绘学院学报》2004年第4期250-252,共3页Journal of Institute of Surveying and Mapping

基　　金：国家自然科学基金资助项目(40274001)

摘　　要：基线长度变化率反映了测站间的地壳运动情况。采用国际空间数据分析中心提供的GPS和VLBI实测站速度数据,解算了并置站间的基线长度变化率。并置站间不同技术测定的地壳运动的相互比较,可以发现不同技术测定地壳运动的系统差。研究结果表明,VLBI基线长度变化率比GPS的相应值系统性地偏大约2%,GPS基线长度变化率比VLBI的相应值快一个常值(约0.6mm/a)。The baselines length rates of baselines of co-located sites were calculated by space geodetic data from GPS and VLBI measurements. The changing rates of baselines reflected crustal motion of different sites. Through comparing the results about crustal motion by different skills on co-located sites, we could identify the system error about those skills. The results indicated: The baselines length changing rates of baselines of VLBI measurement are 2% higher than that of GPS, while GPS changes faster than VLBI by a constant (approximately 0.6 mm/a).

关 键 词：VLBI GPS 地壳运动 基线长度变化率 

分 类 号：P227[天文地球—大地测量学与测量工程]