Observing UT1‑UTC with VGOS
Journal article, 2021

We present first results for the determination of UT1-UTC using the VLBI Global Observing System (VGOS). During December 2019 through February 2020, a series of 1 h long observing sessions were performed using the VGOS stations at Ishioka in Japan and the Onsala twin telescopes in Sweden. These VGOS-B sessions were observed simultaneously to standard legacy S/X-band Intensive sessions. The VGOS-B data were correlated, post-correlation processed, and analysed at the Onsala Space Observatory. The derived UT1-UTC results were compared to corresponding results from standard legacy S/X-band Intensive sessions (INT1/INT2), as well as to the final values of the International Earth Rotation and Reference Frame Service (IERS), provided in IERS Bulletin B. The VGOS-B series achieves 3–4 times lower formal uncertainties for the UT1-UTC results than standard legacy S/X-band INT series. The RMS agreement w.r.t. to IERS Bulletin B is slightly better for the VGOS-B results than for the simultaneously observed legacy S/X-band INT1 results, and the VGOS-B results have a small bias only with the smallest remaining standard deviation.

VLBI intensives

VGOS twin telesc

UT1-UTC

VLBI Global Observing System (VGOS)

Author

Rüdiger Haas

Chalmers, Space, Earth and Environment, Onsala Space Observatory

Eskil Varenius

Chalmers, Space, Earth and Environment, Onsala Space Observatory

Saho Matsumoto

Geospatial Information Authority of Japan

Matthias Schartner

Vienna University of Technology

Swiss Federal Institute of Technology in Zürich (ETH)

Earth, Planets and Space

1343-8832 (ISSN) 1880-5981 (eISSN)

Vol. 73 1 78

Driving Forces

Sustainable development

Subject Categories

Other Earth and Related Environmental Sciences

Earth and Related Environmental Sciences

Geophysics

Roots

Basic sciences

Infrastructure

Onsala Space Observatory

DOI

10.1186/s40623-021-01396-2

More information

Latest update

4/30/2021