The German Research Center for Geosciences (GFZ) is providing ultra rapid multi-GNSS orbit-, clock- and EOP-product series (EOP = Earth Orientation Parameters). The Orbit/Clock product covers
ITRF2020-u2024 is the second ITRF020 update, generated by adding four years (2021.0 – 2025.0) of data after the end of the ITRF2020 input data. The four Technique Centers (IDS, IGS, ILRS, IVS) who pro
Context and methodology Global reference frame solution from Very Long Baseline Interferometry based on IVS data at S/X-band and VGOS Celestial Reference Frame: Source positions are in the J2000 fram
We investigate the potential for EOP and UT1-UTC measurements at K-band (24 GHz). A ‘K-band collaboration’ has been making regular VLBA K-band astrometry sessions since 2016 for expansion and improvem
[from the Explanatory Supplement to IERS Bulletins A and B, "http://hpiers.obspm.fr/eop-pc/products/bulletins/explanatory.html"] IERS Bulletins A and B provide current information on the Earth's o