by Lisa Kern | Mar 31, 2025 | Publication
An unexpected VLBI scale drift has been observed in the latest realization of the ITRS, ITRF2020, beginning shortly after epoch 2013.75 and continuing through 2021.0. A detailed analysis of the station motion model for NYALES20 (Svalbard, Norway) revealed a linear...
by Lisa Kern | May 2, 2024 | Publication
The new-generation geodetic radio telescopes observe two orthogonal linear polarization directions. Calibration of the gain differences between the two polarizers is necessary to maximize the signal-to-noise ratio of observations. This study investigates these...
by Lisa Kern | Nov 23, 2023 | Publication
A paper on the optimal distribution of VLBI transmitters in the Galileo space segment for frame ties (simulation study) has been published in Earth, Planets and Space. Check it out!
by Lisa Kern | Nov 20, 2023 | Publication
A paper on the importance of accurate pole and station coordinates for the determination of UT1 with VLBI Intensive sessions (simulation study) has been published in the Journal of Geodesy. Check it out!
by Lisa Kern | Nov 9, 2023 | Publication
A paper on the computation of global reference frames from very long baseline interferometry (VLBI) observations at the Vienna International VLBI Service for Geodesy and Astrometry (IVS) Analysis Center (VIE) has been published in A&A (here).
by Lisa Kern | Oct 10, 2022 | Publication
The installation of a VLBI transmitter on Galileo satellites would allow observing satellites besides quasars with VLBI telescopes. Three additional Dilution of Precision (DOP) factors were introduced which are representing the sensitivity of a satellite observation...
