NEW FEATURE! IVS articles of interest: June 2023

This month’s IVS-related articles (courtesy of Nlingi Habana: thank you!):

Pakize, et al. (2023): “On the improvement of the sensitivity levels of VLBI solutions from a combination with GNSS”

“The fundamental goal of the quality assessment using the sensitivity is to find out to what level VLBI can detect station displacements in the adjusted coordinates. However, the global VLBI station network is worse in terms of the number and global distribution of stations when compared to the GNSS station network. In this study, we aim to improve the capacity of VLBI to detect station displacements through an inter-technique combination with GNSS.”

Weston, et al. (2023): “On More than Two Decades of Celestial Reference Frame VLBI Observations in the Deep South: IVS-CRDS (1995–2021)”

“Due to the geographic distribution of observing stations being concentrated in the Northern hemisphere [Celestial Reference Frames], CRFs, are generally weaker in the South due to there being fewer Southern Hemisphere observations. [Sometimes they are weaker by factors of two or more in both density and precision]. This paper covers the evolution of the [Celestial Reference Frame Deep South] observing program for the period 1995 to 2021, details the data products and results, and concludes with a summary of upcoming improvements to this ongoing project.”

Krasna, et al. (2023): “The K-band (24 GHz) Celestial Reference Frame determined from Very Long Baseline Interferometry sessions conducted over the past 20 years”

“In this paper, we present celestial reference frames estimated from Very Long Baseline Interferometry measurements at K-band (24 GHz) including data until June 2022. [Our study] consists of more than 120 24h observing sessions performed over the past 20 years.”

Gurvits (2023): “A Brief History of Space VLBI”

“Space Very Long Baseline Interferometry is a radio astronomy technique distinguished by a record-high angular resolution reaching single-digit microseconds of arc. The paper provides a brief account of the history of developments of this technique over the period 1960s–2020s”

International VLBI Service for Geodesy and Astrometry