The projects you can find also assigned to the various Topics of Section 1.1.

Projects GNSS Infrastructure and Analysis:

• Time as observable in integrated ground and space-based GNSS analysis
• Analysis Center of the Multi-GNSS Experiment (MGEX)
• GNSS Product Combination
• Geodetic Reference Service Provider (GRSP) for Galileo
• Third GNSS Reprocessing Campaigns
• GNSS Hardware Development
• Combination of ground- and space-based GNSS observations

Projects Real-Time GNSS:

• IGS-RTAC HT-RTP
• IGS Real-time Analysis Center
• Real-time GNSS precise positioning service
• Ionospheric modelling using LEO constellations
• LEO constellation enhanced GNSS
• Integrated Plate Boundary Observatory Chile (IPOC)

Projects Combination and VLBI:

• AGORA: Alignment of Gaia optical and radio reference frames
• Next generation GNSS constellations for GGOS-compliant geodetic solutions (NextGNSS4GGOS)
• Combination of Space Geodetic Techniques with Clock Ties and Atmospheric Ties (COCAT)
• IAG / IAU / IERS Joint Working Group on the Consistent Realization of CRF, TRF, and EOP (CRCTE)
• IERS 2^nd EOP Prediction Comparison Campaign

Projects GNSS Meteorology:

• Atmospheric model for precise GNSS applications (AMG)
• Exploitation of GNSS tropospheric gradients for severe weather Monitoring And Prediction (EGMAP)
• E-GVAP: The EUMETNET EIG GNSS water vapour programme
• GCOS Reference Upper Air Network (GRUAN)
• Measurement campaign on hydro-meteorological extremes: Swabian MOSES 2023
• 3D open-air laboratory for climate change research: WegenerNet

Projects GNSS Radio Occultation:

• Monitoring and Modeling of Space Weather Phenomena Using Novel Satellite Observations (in cooperation with National Central University, Taiwan)
• International Radio Occultation Working Group, Climate
• Atmospheric Temperature Changes and their Drivers

Projects GNSS Reflectometry:

• Arctic GNSS Ice Detection (ArGID)
• Artificial Intelligence for GNSS Reflectometry (AI4GNSSR)
• Assessment of Snow and Ice Reflections with In-Situ data (ASIRIS)
• Atmospheric model for GNSS reflectometry (AMGr)
• GNSS Receiver for Occultation, Reflectometry and Scatterometry (GORS)
• GNSS Transpolar Earth Reflectometry moNitoring system (G-TERN)
• Ocean and Atmosphere
• GNSS Remote Sensing aboard small satellites
• Space-based sea-ice observation with GNSS Reflectometry
• Soil moisture from reflected GNSS signals
• Water Stress Monitoring using GNSS Reflected Signals (Warm-Green)

• ADVANTAGE (Advanced Technologies for Navigation and Geodesy, HGF, Initiative and Networking Fund, 2017-2020)
• AMUSE (Advanced MUlti-GNSS Array for Monitoring Severe Weather Events)
• ATMO-CHAMP/GRACE (Federal Ministry of Education and Research, GEOTECHNOLOGIEN programme, 2009-2011).
• CHAMP-RO (GPS Radiooccultation with CHAMP)
• COPS-GRID (Improvement of precipitation forecast with GPS, DFG priority programme "Quantitative precipitation forecast, SPP 1167)
• Delay-Doppler Map (DDM) Based Retrieval for GNSS-R Altimetric Sea Surface Heights from CYGNSS Constellations
• „DynamicEarth“  DFG priority program (2015-2022): Global observation of ionospheric sporadic E-layers and their relation to atmospheric and ionospheric phenomena, more information here
• Ties between kinematic and dynamic reference frames (D-VLBI)
• Extension of the coordinate parameterization of radio sources observed by VLBI (ECORAS)
• Estimating climatic trends using GNSS
• EWRICA (Early-Warning and Rapid Impact Assessment with real-time GNSS in the Mediterranean, Federal Ministry of Education and Research, 2020-2023)
• GARCA (GNSS-Reflectometry Assessment of Requirements and Consolidation of Retrieval Algorithms, ESA, 2014-2016)
• GEOHALO (Airborne GNSS Remote Sensing over the Mediterranean, 2012-2014)
• GEROS-ISS (GNSS Remote Sensing aboard the ISS, ESA study)
• Gfg² (GNSS for Global Earth Observation, EU, Summer School, 2013)
• GGOS-SIM (Simulation of the Global Geodetic Observing System, DFG, 2014-2022)
• GNSS Tomography (Development of a tomographic water vapour sounding system based on GNSS data, DFG, 2007-2013)
• GPS-SIDS (Ground-based Sea Ice Campaign in Disko Bay, Greenland, ESA)
• G-SEIS (GPS-surface deformation within seconds, Federal Ministry of Education and Research, 2007-2010)
• GW-CODE (Gravity wave coupling processes and their decadal variation), DFG priority program CAWSES (Climate and Weather of the Sun-Earth System)
• IDEAL-GRACE (Gravity wave coupling processes, DFG priority program 1257 "Mass Transports and and Mass Distribution in the Earth system")
• IGS Reprocessing (Reprocessing Campaigns of the International GNSS Service (IGS), since 2010)
• MuSE (Multi-satellite ionosphere-plasmasphere electron density reconstruction, DFG priority program 1788 ‘DynamicEarth’)
• OpenGPS (Development of OpenGPS receiver)
• PMARS (Soil Moisture Measurements in Morocco)
• Tidal Loading and Asthenospheric Anelasticity (Natural Environment Research Council, Great Britain, 2018-2021)
• TRYAT (international school project "TRack Your ATmosphere", since 2017)
• Tsunami Detection (feasibility study for satellite-based tsunami detection with GNSS reflectometry)
• VLBI-ART (VLBI Analysis in Real-Time)
• Walchensee Experiment (Reflectometry experiment with the GORS (GNSS Occultation, Reflectometry and Scatterometry) receiver prototype, 2007)
• WISDOM (Water level monitoring of the Mekong Delta in Vietnam, 2012-2014)
• Zeppelin (Zeppelin-based GNSS Remote Sensing over Lake Constance, 2010-2014)