Space-VLBI phase-reference mapping and astrometry
Space-VLBI phase-reference mapping and astrometry
复制标题
空间 VLBI 相位参考测绘和天体测量
DOI：
10.1051/0004-6361:20010370
复制
发表时间：
2001
影响因子：
6.5
通讯作者：
R. Preston
中科院分区：
文献类型：
--
作者：
J. Guirado;E. Ros;D. Jones;J. Lestrade;J. Marcaide;M. Pérez;R. Preston
我们提出了5 GHz的空间VLBI观测的类星体对B 1342+662/B 1342+663，证明了可行性的相位参考技术，使用天线在空间。天基数据由空间VLBI使命VSOP的HALCA卫星获取。从剩余的（参考）阶段，我们得到了10米的上限的航天器轨道重建的不确定性。对源的相位参考图的分析还表明，上述不确定性可能不大于3米。由于这种量级的误差，HALCA是一个有用的工具，用于天体测量研究的密切对无线电源。
We present 5 GHz space-VLBI observations of the quasar pair B 1342+662/B 1342+663 that demonstrate the feasibility of phase-reference techniques using an antenna in space. The space-based data were taken by the satellite HALCA, of the space-VLBI mission VSOP. From residual (referenced) phases we derive an upper bound of 10 meters to the uncertainty of the spacecraft orbit reconstruction. An analysis of the phase-reference maps of the sources additionally suggests that the above mentioned uncertainty is likely not larger than 3 meters. With errors of this magnitude, HALCA is a useful tool for astrometric studies of close pairs of radio sources.