The data files contain the GNSS RINEX observation files and the ASCII files of the EDM measurements for the different measurement campaigns used in the article "Development of a Submillimetric GNSS-Based Distance Meter for Length Metrology" by Luis García-Asenjo, Sergio Baselga, Chris Atkins and Pascual Garrigues, Sensors 2021, 21, 1145. https://doi.org/10.3390/s21041145. This work was partly performed within the 18SIB01 GeoMetre project of the European Metrology Programme for Innovation and Research (EMPIR). This project has received funding from the EMPIR programme co-financed by the Participating States and from the European Union’s Horizon 2020 research and innovation programme, funder ID: 10.13039/100014132. This research was also partly funded by the Spanish Ministry of Education, Culture and Sports (PRX17/00371). All files are ASCII files: RINEX files with standard extension and filename notation, where PL1A indicates pillar 1 GNSS with receiver A, PL3B pillar 3 GNSS with receiver B, (as indicated in the paper two receivers per pillar where used), etc.; and space-separated ASCII files with explanatory headers for the ME5000 EDM observations.