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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).
The GFZ Helmholtz Centre for Geosciences (GFZ) acts as an operational analysis center of the EUMETNET EIG GNSS water vapour programme (E-GVAP, https://egvap.dmi.dk/). GFZ provides all types of tropospheric products in near-real time in three processing lines: ultra-rapid (E-GVAP solution ID is GF1U), rapid (GF1R), and global (GF1G). The rapid solution series is published hourly with a delay of around 25 minutes after the end of each hour. Operational tropospheric products of GFZ included in this data publication are: (1) Zenith Total Delays (ZTD), Integrated Water Vapor (IWV); (2) Tropospheric gradients in North and East directions; (3) Slant Total Delays (STD)
The GFZ Helmholtz Centre for Geosciences (GFZ) acts as an operational analysis center of the EUMETNET EIG GNSS water vapour programme (E-GVAP, https://egvap.dmi.dk/). GFZ provides all types of tropospheric products in near-real time in three processing lines: ultra-rapid (E-GVAP solution ID is GF1U), rapid (GF1R), and global (GF1G). The global solution series is published hourly with a delay of around 50 minutes after the end of each hour. Operational tropospheric products of GFZ included in this data publication are: (1) Zenith Total Delays (ZTD), Integrated Water Vapor (IWV); (2) Tropospheric gradients in North and East directions; (3) Slant Total Delays (STD)
The GFZ Helmholtz Centre for Geosciences (GFZ) acts as an operational analysis center of the EUMETNET EIG GNSS water vapour programme (E-GVAP, https://egvap.dmi.dk/). GFZ provides all types of tropospheric products in near-real time in three processing lines: ultra-rapid (E-GVAP solution ID is GF1U), rapid (GF1R), and global (GF1G). The ultra-rapid solution series is published hourly with a delay of around 15 minutes after the end of each hour. Operational tropospheric products of GFZ included in this data publication are: (1) Zenith Total Delays (ZTD), Integrated Water Vapor (IWV); (2) Tropospheric gradients in North and East directions; (3) Slant Total Delays (STD)
The Early-Warning and Rapid Impact Assessment with real-time GNSS in the Mediterranean (EWRICA) is a federal Ministry of Education and Research funded project (funding period: 2020-2023) that aims to develop fast kinematic and point source inversion and modeling tools combining GNSS-based near field data with traditional broadband ground velocity and accelerometer data. Fast and robust estimates of seismic source parameters are essential for reliable hazard estimates, e.g. in the frame of tsunami early warning. Hence, EWRICA aims for the development and testing of new real time seismic source inversion techniques based on local surface displacements. The resulting methods shall be applied for tsunami early warning purposes in the Mediterranean area. In this framework, this repository is a suite of four packages that can be used and combined in different ways and are ewricacore, ewricasiria, ewricagm and ewricawebapp. These four packages can be deployed in a docker container (see instructions below) to demonstrate a possible output of Early-Warning and Rapid Impact Assessment. In the Docker, a probabilistic earthquake source inversion report (ewricasiria) and a Neural network based Shake map (ewricagm) are generated for two past earthquakes whose data (event and waveform) is continuously served by GEOFON servers at regualr intervals to produce and test a real case scenario. The whole workflow is managed by ewricacore, a central unit of work that first fetches the waveform data via the seedlink protocol and event data via event bus or FDSN web service, then collects and cuts waveforms segments according to a custom configuration, and eventually triggers custom processing (ewricasiria and ewricagm in the docker, but any processing can be implemented) whenever configurable conditions are met. The final package, ewricawebapp is a web-based graphical user interface that can be opened in your local browser or deployed on your web server in order to visualize and check all output produced by the docker workflow in form of HTML pges, images and data in various formats (e.g., JSON, log text files). The EWRICA Docker package includes the following tools: ewricacore: Central unit for all Ewrica components and event/data listener ewricagm: Create ground motion maps via pre-trained Neural Network ewricasiria: Ewrica Source Inversion and Rapid Impact Assessment Python package ewricawebapp: Ewrica web portal and GUI demo grond: A probabilistic earthquake source inversion framework (Heimann et al., 2018) stationsxml-archive: Storage repository for synchronizing Station XMLs
The TectoVision GNSS network in Greece was set up using European Research Council funding in partnership between German and Greek institutions. The project aims to deepen our understanding of suspected microplate motions in Greece. A total of 72 GNSS stations are planned for the TectoVision network. Two types of GNSS station equipment is used, reflected by the 4 character station ID. Stations with ID beginning with 'TT' were installed using the tinyBlack receiver. The stations with ID beginning 'TM' were set up using the Minimum Cost GNSS System (MCGS) design. RINEX (v3.05 as of May 2024) data at 30 seconds sampling interval are provided. Most of the data are sent over mobile internet via routers that are connected to the receivers via LAN cable. If required, the RINEX files can be converted to other versions using the GFZ software GFZRNX (Nischan, 2016). Raw observation data can be made available upon specific request. Hardware: The GFZ developed tinyBlack receiver combines cost efficient L2C GNSS receivers (here Swiftnav Piksi) with PC-based data logger package, internal storage, and interfaces. The control software is designed for remote operation ensuring long-term continuous tracking. The tinyBlack receivers provided by the GFZ spin-off maRam UG (Germany) are installed in combination with Harxon GPS500 survey antennas. The tinyBlack stations provide GPS (L1/L2), GLONASS (G1/G2), and Galileo (E1/E5b) data. The low-cost MCGS stations are coming in 2 versions from a GNSS technology transfer project at GFZ. Both versions operate a ublox F9P receiver and an integrated chip-antenna with a pyramidal antenna radome. One version provides GPS (L1/L2), Glonass (G1/G2), Galileo (E1/E5b) and also Beidou (B1/B2) data. The other version (currently only 3 systems installed) is designed for low power operation in remote areas with data telemetry over a narrrow bandwidth radio link. This version delivers only GPS (L1/L2) data without doppler observations at a reduced data rate of 60 seconds. Monumentation: There is a variety of monumentation for these stations, with the design of the monumentation being low-cost. Most are connected to a thread that is attached to a stainless steel pin which is glued into masonry or bedrock. Most sites are installed on rooftops of public buildings. The MCGS is sometimes clamped to an existing sturdy pole connected to the roof of the building. Some stations are connected to an extending stainless-steel arm that we have drilled into the side of a building. Photos of the station are provided with the standard GNSS station log-files (as metadata). If the instrumentation at existing monuments is later changed to other hardware types, the station ID retain the original TT and TM 4-character IDs. Metadata: Station-specific metadata records are stored in IGS sitelog files available via ftp.
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).
The GFZ Helmholtz Centre for Geosciences (GFZ) acts as an operational analysis center of the EUMETNET EIG GNSS water vapour programme (E-GVAP, https://egvap.dmi.dk/). GFZ provides all types of tropospheric products in near-real time in three processing lines: ultra-rapid (E-GVAP solution ID is GF1U), rapid (GF1R), and global (GF1G). The ultra-rapid solution series is published hourly with a delay of around 15 minutes after the end of each hour. Operational tropospheric products of GFZ included in this data publication are: (1) Zenith Total Delays (ZTD), Integrated Water Vapor (IWV); (2) Tropospheric gradients in North and East directions; (3) Slant Total Delays (STD)
Orbital products describe positions and velocities of satellites, be it the Global Navigation Satellite System (GNSS) satellites or Low Earth Orbiter (LEO) satellites. These orbital products can be divided into the fastest available ones, the Near Realtime Orbits (NRT), which are mostly available within 15 to 60 minutes delay, followed by Rapid Science Orbit (RSO) products with a latency of two days and finally the Precise Science Orbit (PSO) which, with a latency of up to a few weeks, are the most delayed. The absolute positional accuracy increases with the time delay. This dataset compiles the RSO products for various LEO missions and the appropriate GNSS constellation in sp3 format. The individual solutions for each satellite mission are published with individual DOI as part of this compilation. GNSS Constellation: • GNSS 24h (v01): https://doi.org/10.5880/GFZ_ORBIT/RSO/GNSS_G_v01 • GNSS 30h (v02): https://doi.org/10.5880/GFZ_ORBIT/RSO/GNSS_G_v02 • GNSS 30h (v03): https://doi.org/10.5880/GFZ_ORBIT/RSO/GNSS_G_v03 LEO Satellites: • CHAMP - CHAMP (v01): https://doi.org/10.5880/GFZ_ORBIT/RSO/L06_G_v01 • GRACE - GRACE-A (v01): https://doi.org/10.5880/GFZ_ORBIT/RSO/L09_G_v01 - GRACE-B (v01): https://doi.org/10.5880/GFZ_ORBIT/RSO/L10_G_v01 • GRACE-FO - GRACE-FO-1 (v02): https://doi.org/10.5880/GFZ_ORBIT/RSO/L64_G_v02 - GRACE-FO-1 (v03): https://doi.org/10.5880/GFZ_ORBIT/RSO/L64_G_v03 - GRACE-FO-2 (v02): https://doi.org/10.5880/GFZ_ORBIT/RSO/L65_G_v02 - GRACE-FO-2 (v03): https://doi.org/10.5880/GFZ_ORBIT/RSO/L65_G_v03 • SAC-C - SAC-C (v01): https://doi.org/10.5880/GFZ_ORBIT/RSO/L07_G_v01 • TanDEM-X/ TerraSAR-X - TanDEM-X (v01): https://doi.org/10.5880/GFZ_ORBIT/RSO/L20_G_v01 - TanDEM-X (v02): https://doi.org/10.5880/GFZ_ORBIT/RSO/L20_G_v02 - TanDEM-X (v03): https://doi.org/10.5880/GFZ_ORBIT/RSO/L20_G_v03 - TerraSAR-X (v01): https://doi.org/10.5880/GFZ_ORBIT/RSO/L13_G_v01 - TerraSAR-X (v02): https://doi.org/10.5880/GFZ_ORBIT/RSO/L13_G_v02 - TerraSAR-X (v03): https://doi.org/10.5880/GFZ_ORBIT/RSO/L13_G_v03 Each solution is given in the Conventional Terrestrial Reference System (CTS). • The GNSS RSOs are 30-hour long arcs starting at 21:00 the day before the actual day and ending at 03:00 the day after. The accuracy of the GPS RSO sizes at the 3-cm level in terms of RMS values of residuals after Helmert transformation onto IGS combined orbit solutions (Version 1 GNSS RSOs are 24-hour long arcs starting at 00:00 and ending at 24:00 the actual day). • The LEO RSOs are generated based on these 30-hour GNSS RSOs in two pieces for the actual day with arc lengths of 14 hours and overlaps of 2 hours. One starting at 22:00 and ending at 12:00, one starting at 10:00 and ending at 24:00. The accuracy of the LEO RSOs is at the level of 1-2 cm in terms of SLR validation. The exact time covered by an arc is defined in the header of the files and indicated as well as in the filename. This dataset compiles RSO products for various LEO missions and the corresponding GNSS constellation in sp3 format in a revised processing version 2. The switch from previous version 1 to 2 was performed on 18-Feb-2019. Major changes from version 1 to 2 are the change from IERS 2003 to IERS 2010 conventions and ITRF 2008 to ITRF-2014, as well as the temporal extension of the GNSS constellation from previous 24 hours (version 1) to 30 hours (version 2) arcs. This temporal expansion eliminates the chaining of two consecutive 24-hour GNSS constellation solutions previously used to process day-overlapping LEO arcs in Version 1. The transition from Version 2 to Version 3 took place on 1 July 2023 for the RSO system and on 3 July 2024 for the NRT system. The fundamental update from Version 2 to 3 is the change from ITRF2014 to ITRF2020. This 24h GNSS constellation (Version 1) will continue to operate and be stored on the ISDC ftp server, as discussed in more detail in Section 8.1. All RSO LEO arcs will no longer be continued in version 1 after the changeover date and will only be available in version 2 since then.
This dataset provides Rapid Science Orbits (RSO) from the Low Earth Orbiter (LEO) satellite GRACE-FO-1. It is part of the compilation of GFZ RSO products for various LEO missions and the appropriate GNSS constellation in sp3 format. The individual solutions for each satellite mission are published with individual DOI as part of the compilation (Schreiner et al., 2022). • The GRACE-FO RSO cover the period: - from 2019 049 to up-to-date The LEO RSOs in version 2 are generated based on the 30-hour GPS RSOs in two pieces for the actual day with arc lengths of 14 hours and overlaps of 2 hours. One starting at 22:00 and ending at 12:00, one starting at 10:00 and ending at 24:00. Due to the extended length of the constellation, there is no need to concatenate several constellations for day-overlapping arcs. The accuracy of the LEO RSOs is at the level of 1-2 cm in terms of SLR validation. Each solution in version 2 is given in the Conventional Terrestrial Reference System (CTS) based on the IERS 2010 conventions and related to the ITRF-2014 reference frame. The exact time covered by an arc is defined in the header of the files and indicated as well as in the filename.
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