Chopo Ma

TL;DR: A quasi-inertial reference frame is defined based on the radio positions of 212 extragalactic sources distributed over the entire sky as discussed by the authors, which is better than about 1 mas in both coordinates.

TL;DR: The Very Long Baseline Array Calibrator Survey (VCS1) as mentioned in this paper is the largest high-resolution radio survey ever undertaken and triples the number of sources available to the radio astronomy community for VLBI applications.

TL;DR: In this paper, an analysis of VLBI measurements performed between 1984 and 1990 by means of a network of 53 sites in Alaska, the Yukon Territory, and the conterminous United States to determine the extent of horizontal motions in Alaska is presented.

TL;DR: The Mark III very-long-baseline interferometry (VLBI) system allows recording and later processing of up to 112 megabits per second from each radio telescope of an interferometer array, which allows detection and study of compact sources with flux densities under 1 millijansky.

TL;DR: The International Celestial Reference Frame (ICRF) 3 as discussed by the authors is based on the work achieved by a working group of the International Astronomical Union (IAU) mandated for this purpose.