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Towards Inter-Technique Co-Location of GNSS and VLBI Observations
(2021)EGUsphereOther Conference Item -
A Study on Rigorous Combination of GNSS and VLBI Observations
(2021)EGUsphereOther Conference Item -
Total Electron Content Monitoring Complemented with Crowdsourced GNSS Observations
(2022)EGUsphereGlobal Navigation Satellite System (GNSS) is a well-recognized observation technique in studies on the ionosphere due to its sensitivity to the total electron content (TEC). The era of modern smartphones, running on Android version 7.0 and higher, facilitates the acquisition of raw dual-frequency GNSS measurements, paving the way for the GNSS community data to be potentially exploited in geoscience applications. One can assume that the ...Other Conference Item -
Application of machine learning to globally model tropospheric parameters
(2022)Other Conference Item -
How small can ground movements be to be detectable with GNSS?
(2021)EGUsphereHigh-precision GNSS (Global Navigation Satellite System) positioning can reach an accuracy at the millimeter level, and by collecting these data over years, very small ground movements can be resolved. These data can be used to study geodynamics, like continental drifts, tidal- and non-tidal loading effects, or earthquakes, for example. Here we focus on the sensitivity of GNSS for resolving these different types of movements. We derive ...Other Conference Item -
Resolving dynamic ground motions with high-rate GNSS and implications for data fusion in broadband seismology and Earthquake Early Warning
(2020)EGUsphereOther Conference Item -
Exploring LEO cube satellite technology for space geodesy: SLR-VLBI POD in the GGOS era
(2021)EGUsphereWith test satellites already in space, the Swiss company Astrocast is currently in the process of establishing a constellation of about 80 nanosatellites for commercial purposes that are operating in a low Earth orbit (LEO). As a result of the collaboration with ETH Zürich, such satellites will be equipped with both low-cost multi-GNSS dual-frequency receivers and a small array of laser retroreflectors for satellite laser ranging (SLR). ...Other Conference Item -
A GNSS Payload for CubeSat Precise Orbit Determination
(2020)EGUsphereGlobal Navigation Satellite Systems (GNSS) have been used as a key technology for satellite orbit determination for about 30 years. With the increasing popularity of miniaturized satellites (e.g., CubeSats that are nanosatellites based on standardized 10 cm-sized units) the need for an adapted payload for orbit determination arises. We developed a small-size versatile GNSS payload board using commercial off-the-shelf single-frequency GNSS ...Other Conference Item -
Improving the Accuracy of GNSS Orbit Predictions using Machine Learning Approaches
(2022)EGUspherePrecise orbit determination is vital for the increasingly vast number of space objects around the Earth. Moreover, accurate orbit prediction of GNSS satellites is essential for many real-time geodetic applications, including real-time navigation. The typical way to obtain accurate orbit predictions is using physics-based orbit propagators. However, the prediction errors accumulate with time because of insufficient modeling of the changing ...Other Conference Item -
Exploring Crowdsourced GNSS Observations For Data Fusion with the Use of Machine Learning
(2022)Global Navigation Satellite System (GNSS) provides autonomous positioning, navigation, and timing services worldwide. It is also a key space-geodetic technique in many areas of science, such as quantification of global-scale geodynamical phenomena, realization of the International Terrestrial Reference System, or studies on the space weather and atmosphere. Thanks to the continuously operational GNSS, long-term trends of total electron ...Other Conference Item