A5022425194- Geophysics and Gravity Measurements
- GNSS positioning and interference
- Inertial Sensor and Navigation
- Geomagnetism and Paleomagnetism Studies
- Statistical and numerical algorithms
- Ionosphere and magnetosphere dynamics
- 3D Surveying and Cultural Heritage
- Fuzzy Systems and Optimization
- Remote Sensing and LiDAR Applications
- Target Tracking and Data Fusion in Sensor Networks
- Historical Geography and Cartography
- Advanced Measurement and Metrology Techniques
- Scientific Measurement and Uncertainty Evaluation
- Multi-Criteria Decision Making
- Numerical Methods and Algorithms
- Structural Health Monitoring Techniques
- Astronomical Observations and Instrumentation
- Fuzzy Logic and Control Systems
- 3D Modeling in Geospatial Applications
- Atmospheric Ozone and Climate
- Soil Geostatistics and Mapping
- Probabilistic and Robust Engineering Design
- Digital Innovation in Industries
- Advanced Statistical Methods and Models
- Robotics and Sensor-Based Localization
Karlsruhe Institute of Technology
1993-2025
Federal Agency for Cartography and Geodesy
2013-2017
Leibniz University Hannover
2004-2011
Leibniz University of Applied Sciences
2009
GeoInformation (United Kingdom)
2005
Bavarian Academy of Sciences and Humanities
2002-2003
GTx (United States)
1999
In-Q-Tel
1999
Abstract. We developed a high-quality global integrated water vapour (IWV) dataset from 12 552 ground-based positioning system (GPS) stations in 2020. It consists of 5 min GPS IWV estimates with total number 1 093 591 492 data points. The completeness rates the are higher than 95 % at 7253 (58 %) stations. is an enhanced version existing operational provided by Nevada Geodetic Laboratory (NGL). enhancement reached employing accurate meteorological information fifth generation European...
Abstract The availability of terrestrial water storage anomaly (TWSA) data from the Gravity Recovery and Climate Experiment (GRACE) supports many hydrological applications. Five TWSA products are operational publicly available, including three based on mass concentration (mascon) solutions two synthesis spherical harmonic coefficients (SHCs). mascon have advantages regarding SHCs since basis functions represented locally rather than globally, which allows geophysical constraints. Alternative...
Abstract. The ground-based Global Positioning System (GPS) has been used extensively to retrieve integrated water vapour (IWV) and adopted as a unique tool for the assessments of atmospheric reanalyses. In this study, we investigated multi-temporal-scale variabilities trends IWV over Europe by using time series from 108 GPS stations more than 2 decades (1994–2018). We then reference assess six commonly reanalyses, namely Climate Forecast Reanalysis (CFSR); ERA5; ERA-Interim; Japanese 55-year...
The modern GNSS technique is one of the most effective geoscience and remote-sensing tool to observe crustal motions quantify plate tectonics dynamics. Given multiple installed continuously operating observing stations, multi-frame transformation implemented connect timevarying coordinates by traditional step-wise method. Compared with treatment each pair frames, proposed structured total least-squares method considers combined estimation for all guaranteeing unique consistent results...
Abstract Integrated Water Vapor (IWV) is crucial in environmental research, offering insights into atmospheric dynamics. Direct IWV measurement challenging, necessitating alternative estimation technologies. Existing methods including Global Navigation Satellite System (GNSS), radiosondes, water vapor radiometers (WVR), satellite remote sensing, and numerical weather models (NWM), have specific limitations. GNSS WVR provide high precision temporal resolution (e.g., 5 min) but are limited to...
In the frame of project "FloodRisk: Earthquakes, uplift, and long-term liabilities – risks minimisation during mine flooding" funded by Federal Ministry Education Research (BMBF), a consortium partners from applied research industry worked on an integrated view post-mining process German hard coal mines in eastern Ruhrarea, Ibbenbüren Saarland. Aspects geodesy, geophysics, soil gas technology geology context flooding were investigated experts these fields. The Geodetic...
Water vapor, the most significant greenhouse gas, plays a critical role in Earth's climate system, influencing hydrological cycle, energy distribution, and atmospheric dynamics. Integrated Vapor (IWV) serves as vital parameter for understanding these processes. While traditional methods, including ground-based instruments satellite observations, provide IWV measurements, they are often limited by spatial resolution, coverage, accuracy. Advances numerical weather models (NWM) remote sensing...
Monitoring surface displacements that occur above storage caverns in salt bodies is important to estimate risks for infrastructure the immediate vicinity. As pressure inside a cavern usually lower than surrounding rock, converges continuously. This volume loss leads prominent subsidence bowl at surface. Often this approximated by linear velocities, However, particular gas caverns, fields of multiple close proximity can cause displacement which are spatio-temporally complex. The amount...
Abstract Since the end of 2022, two ground motion services that cover complete area Germany are available as web services: German Ground Motion Service ( Bodenbewegungsdienst Deutschland , BBD) provided by Federal Institute for Geosciences and Natural Resources (BGR), first release European (EGMS) part Copernicus Land Monitoring Service. Both based on InSAR displacement estimations generated from Sentinel‑1 data. It would seem relevant to compare products against one another, assess data...
Abstract. Tropospheric water vapor is one of the most important trace gases Earth's climate system, and its temporal spatial distribution critical for genesis clouds precipitation. Due to pronounced dynamics atmosphere nonlinear relation air temperature saturated pressure, it highly variable, which hampers development high-resolution three-dimensional maps regional extent. With their complementary high resolutions, Global Navigation Satellite Systems (GNSS) meteorology Interferometric...
The standard reference in uncertainty modeling is the "Guide to Expression of Uncertainty Measurement (GUM)". GUM groups occurring uncertain quantities into "Type A" and B". Uncertainties are determined with classical statistical methods, while B" subject other uncertainties which obtained by experience knowledge about an instrument or a measurement process. Both types can have random systematic error components. Our study focuses on detailed comparison probability fuzzy-random approaches...
This paper describes an adaptive extended Kalman filter (AEKF) approach for geo-referencing tasks a multi-sensor system (MSS). The MSS is sensor fusion of phase-measuring terrestrial laser scanner (TLS) with navigation sensors such as Global Navigation Satellite System (GNSS) equipment and inclinometers. position orientation the are main parameters which constant on station will be derived by filtering process. Hence, TLS/MSS can done without any demand other artificial targets in scanning...