This document describes the services for managing the Global Navigation Satellite System (GNSS) data that have been developed at the Istituto Nazionale di Geofisica e Vulcanologia (INGV) within the context of the European-funded research infrastructure EPOS (European Plate Observing System) program. These services, optimised for solid Earth research applications, seek to harmonise and standardise the collection and quality control of GNSS data and metadata. The EPOS Thematic Core Services (TCS) GNSS developed an architecture based on Geodetic Linkage Advance System Software (GLASS) nodes which hosts the metadata information and allows access to the entire database from the web and a datacenter which hosts the data to distribute. INGV contributes to the EPOS TCS GNSS initiative by...