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 th...

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Bibliographic Details
Published in:arXiv.org 2023-02
Main Authors: Schartner, Matthias, Petrov, Leonid, Plötz, Christian, Lemoine, Frank G, Terrazas, Eusebio, Soja, Benedikt
Format: Article
Language:English
Subjects:
Earth rotation
R&D
Research & development
Online Access:Get full text
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Summary: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 \(\sigma_{UT1-UTC}\) of 3.1 \(\mu\)s and a bias w.r.t. IERS C04 of 1.1 \(\mu\)s. Later, the session performance decreased due to multiple technical difficulties.
ISSN:2331-8422
DOI:10.48550/arxiv.2302.08147