4 citations · 6 across the 3 of their papers we have counts for
4 papers
Consistency and precision of very long baseline interferometry source coordinate time series
X. -X. Zhang, N. Liu, S. B. Lambert +18
Coordinate time series of extragalactic radio sources from very long baseline interferometry observations are widely used to evaluate source positional stability, select stable sou…
Astrometric properties of reference frame sources as a function of redshift
Zhiyun Zhang, N. Liu, Xiaxuan Zhang +8
Previous studies based on the latest realisation of the International Celestial Reference Frame (ICRF3) have suggested a correlation between astrometric properties (such as the rad…
Overall properties of the Gaia DR1 reference frame
N. Liu, Z. Zhu, J. -C. Liu +1
We compare quasar positions of the auxiliary quasar solution with ICRF2 sources using different samples and evaluate the influence on the {\it Gaia} DR1 reference frame owing to th…
Test of source selection for constructing a more stable and uniform celestial reference frame
N. Liu, J. -C. Liu, Z. Zhu
We aim to evaluate the possibility of improving the ICRS realization starting from the ICRF2 catalogue by investigating the coordinate time series of radio sources observed by VLBI…