分析了天测与测地甚长基线干涉测量(very long baseline interferometry,VLBI)观测频率设置的必要性,重点分析了Ka波段观测的利弊......

利用SOFA软件包，消除了常见的天体测量效应，把星的理论位置转换到站心位置，并集中于后续的归算过程。详细介绍了心射投影和底片四常数......

Optical observations from a ground-based astrometric instrument provide a unique set of data sensitive to variations of ......

The availability of astrometric data and radial velocities of carbon stars near the Galactic plane enables us to investi......

Space debris is a major problem for all the nations that are currently active in space.Adopting high-precision measuring......

We present the first in a series studying the astrophysical parameters of open clusters using the PPMXL* database whose ......