Data for homogenization of integrated water vapour time series using twin GNSS stations and vertical step offsets Data for homogenization of integrated water vapour time series using twin GNSS stations and vertical step offsets 2026-270-1 https://doi.org/10.71870/2qmn-f008 Swedish National Data Service Svensk nationell datatjänst Landing page Data for homogenization of integrated water vapour time series using twin GNSS stations and vertical step offsets Data for homogenization of integrated water vapour time series using twin GNSS stations and vertical step offsets 2026-270-1 https://doi.org/10.71870/2qmn-f008 Elgered, Gunnar Elgered, Gunnar Ning, Tong Ning, Tong Swedish National Data Service Svensk nationell datatjänst Landing page atmospheric structure atmosfärens struktur meteorology meteorologi Climatology / Meteorology / Atmosphere Klimatologi och meteorologi Accurate long-term GNSS-derived atmospheric water vapour time series are essential when used in climate research. However, these records are frequently affected by interventions, e.g., change of hardware at the station. We investigate the homogenization of integrated water vapour (IWV) time series co-located GNSS stations at 19 sites in Sweden and one site in Denmark. Långa tidsserier för atmosfärens vattenångeinnehåll används i klimatforskning. Dessa har skattats från GNSS-observationer men påverkas dock ofta av interventioner, t.ex. byte av stationens hårdvara. Vi undersöker homogeniseringen av tidsserier för integrerad vattenånga från samlokaliserade GNSS-stationer på 19 platser i Sverige och en plats i Danmark. Sweden Sverige Denmark Danmark Numeric Access to data through SND. Data are freely accessible. Åtkomst till data via SND. Data är fritt tillgängliga. openAccess Ning, T. and Elgered, G. (2026). Homogenization of integrated water vapour time series using twin GNSS stations and vertical step offsets. To be submitted to Atmospheric Measurement Techniques Discussions (ISSN: 1867-8610) Ning, T. and Elgered, G. (2026). Homogenization of integrated water vapour time series using twin GNSS stations and vertical step offsets. To be submitted to Atmospheric Measurement Techniques Discussions (ISSN: 1867-8610) 2026