<div>Geoscience Australia currently retains the role of the International GNSS Service Analysis Centre Coordinator (IGS ACC) in collaboration with Massachusetts University of Technology (MIT). The IGS ACC is responsible for monitoring the quality of products submitted by individual analysis centers, and combining them to produce the official IGS products. The IGS ACC also has the overall responsibility for coordinating the changes, developments and improvements within the contributing analysis centers to produce the IGS products using the latest models and standards. This report details the IGS ACC activities over 2023, which included general quality assessment of the IGS combined products over 2023, introduction of a new IGS Analysis Center (JGX, Japan), extension of the combined products for the third IGS reprocessing campaign (repro3) for 2021-2022, and multi-GNSS ultra-rapid demonstration combined orbits.</div> <b>Citation for full report:</b> Dach, R., Bockmann, E. (eds.) (2024). International GNSS Service Technical Report 2023 (IGS Annual Report). IGS Central Bureau and University of Bern; Bern Open Publishing DOI 10.48350/191991

<div>Geoscience Australia currently performs the role of the International GNSS Service Analysis Centre Coordinator (IGS ACC) in a collaboration with Massachusetts University of Technology (MIT). The IGS ACC is responsible for monitoring the quality of products submitted by individual analysis centers, and combining them to produce the official IGS products. The IGS ACC also has the overall responsibility for coordinating the changes, developments and improvements within the contributing analysis centers to produce the IGS products using the latest models and standards. This report details the IGS ACC activities over 2022, which included the transition to a new reference frame IGS20 and results of the multi-GNSS combined orbit and clock products for Repro3.</div> <b>Citation:</b> Dach, R., Bockmann, E. (eds.) (2023). <i>International GNSSServiceTechnical Report 2022 (IGSAnnual Report)</i>. IGSCentral Bureau andUniversity of Bern; BernOpenPublishing DOI10.48350/179297