2 research outputs found
VGOS VLBI Intensives between MACGO12M and WETTZ13S for the rapid determination of UT1-UTC
In this work, we present a status update and results of the designated
research and development VLBI Intensive program VGOS-INT-S, observed between
MACGO12M and WETTZ13S for the rapid determination of the Earth's phase of
rotation, expressed via UT1-UTC. The main novelty of these sessions is the use
of a special observation strategy, rapidly alternating between high- and
low-elevation scans, enabling an improved determination of delays caused by the
neutral atmosphere. Since 2021, 25 Intensive sessions have been observed
successfully. In early 2022, VGOS-INT-S was among the most accurate Intensive
programs with an average formal error of 3.1 s and a
bias w.r.t. IERS C04 of 1.1 s. Later, the session performance decreased
due to multiple technical difficulties.Comment: 8 pages, 5 figure