10.5880/GFZ.1.1.2024.003 eng dataset GFZ German Research Centre for Geosciences datapub@gfz-potsdam.de http://www.gfz-potsdam.de Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences pointOfContact 2025-02-02 urn:ogc:def:crs:EPSG:4326 GFZ GNSS-derived precipitable water vapor for climate reference network GRUAN 2025-02-02 revision doi:10.5880/GFZ.1.1.2024.003 Dick, Galina GFZ Helmholtz Centre for Geosciences, Potsdam, Germany author Wickert, Jens GFZ Helmholtz Centre for Geosciences, Potsdam, Germany author Zus, Florian GFZ Helmholtz Centre for Geosciences, Potsdam, Germany author Männel, Benjamin GFZ Helmholtz Centre for Geosciences, Potsdam, Germany author Bradke, Markus GFZ Helmholtz Centre for Geosciences, Potsdam, Germany author Ramatschi, Markus GFZ Helmholtz Centre for Geosciences, Potsdam, Germany author Brandt, Andre GFZ Helmholtz Centre for Geosciences, Potsdam, Germany author GFZ Data Services publisher The Global Climate Observing System (GCOS) Reference Upper Air Network (GRUAN, https://www.gruan.org/ ) of the World Meteorological Organization (WMO) is an international observing network, designed to meet climate requirements. Upper air observations within the GRUAN network will provide long-term high-quality climate records. A GNSS receiver is part of the GRUAN station equipment with highest priority for measuring of atmospheric water vapor. GRUAN observations are intended to provide long-term high-quality data for the reliable determination of climatological trends and to provide further insight into atmospheric processes. Precise GNSS data analysis is a key to reach data quality on the highest level. Due to its long-term experience in GNSS data processing, GFZ was selected as a Central GRUAN GNSS Data Processing Centre. This data publicatoion includes the GRUAN Data Product (GDP) of GFZ: GNSS Precipitable Water (PW). Dick, Galina GFZ Helmholtz Centre for Geosciences, Potsdam, Germany Senior Scientist dick@gfz.de https://www.gfz.de/en/staff/galina.dick/sec11 informtion pointOfContact Zus, Florian GFZ Helmholtz Centre for Geosciences, Potsdam, Germany Scientist zusflo@gfz.de pointOfContact Precipitable Water Integrated Water Vapor Atmospheric Water Vapor Climate Earth Remote Sensing Instruments > Passive Remote Sensing > Positioning/Navigation > GNSS GCMD Instruments publication EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR NASA/GCMD Earth Science Keywords publication CC BY 4.0 CC BY 4.0 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5030246 URL IsDocumentedBy https://www.gruan.org/documentation/gruan/td/gruan-td-6 URL IsDocumentedBy 10.1016/S1364-6826(00)00248-0 DOI Cites 10.5880/GFZ.1.1.2020.004 DOI Cites 10.1175/JCLI-D-15-0158.1 DOI Cites 10.5194/amt-15-21-2022 DOI Cites https://www.gruan.org/ URL References eng geoscientificInformation -180 180 -90 90 http://doi.org/10.5880/GFZ.1.1.2024.003 WWW:LINK-1.0-http--link Data Access - DOI Data Access - DOI information GFZ GRUAN Processing Centre generates Precipitable Water (PW) products for GNSS sites of the GRUAN network using the latest development version of the EPOS.P8 Software. The solution series contains: Precipitable Water (PW), converted from the Zenith Total Delays (ZTD) Folder sinex_trop_GRUAN_EPOS8 with subfolders for GPS weeks (e.g., w2348): daily files for each processed GNSS site. Files: IIIIWWWWD.tro: files with Zenith Total Delays, Precipitable Water (also called Integrated Water Vapor), tropospheric gradients; IIIIWWWWD.zpd: files with Zenith Total Delays and tropospheric gradients; where IIII - GNSS site name, WWWW - GPS week, D - day of the week; Data format: SINEX_TRO: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5030246 The processing with EPOS.P8 is described in detail in Wang et al. (2019).