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Status of GGOS JWG3 on Improved understanding of space weather events and their monitoring
(2021)EGUsphereThe JWG3 aims at investigating different approaches to monitor space weather events using the data from different space geodetic techniques and, in particular, combinations thereof. Simulations will also be considered since these could be beneficial to identify the contribution of different techniques and prepare for the analysis of real data. Different strategies for the combination of data are also to be investigated, in particular the ...Other 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 -
Automatic selection of crowdsourced GNSS smartphone data for atmosphere sounding
(2022)Smartphones have been transformed into portable GNSS (Global Navigation Satellite System) receivers since Google’s release of the Android 7 operating system. The GNSS data recorded by billions of such devices have great potential for scientific studies, with unprecedented spatiotemporal resolution. However, access to largescale GNSS smartphone data is currently limited and the data processing is challenging. The project CAMALIOT (Application ...Other Conference Item -
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Application of machine learning to globally model tropospheric parameters
(2022)Other Conference Item -
On the detection of structural breaks in GNSS station coordinate time series caused by earthquakes using machine learning
(2021)IAG 2021 Abstract Book: Geodesy for a Sustainable EarthOther Conference Item -
Realization of time sequential estimation of terrestrial reference frame using square-root information filter and smoother
(2020)EGUsphereThe JTRF2014 realization of terrestrial reference frame has adopted a weekly time series representation that can track dominant non-linear station motions including periodic and random variations. The realization is based on the Kalman filter and smoother algorithms whose time sequential nature would also be suitable for continuous updating of an existing frame as soon as new geodetic data become available. As a part of preparation ...Other Conference Item -
New GGOS JWG3 on Improved understanding of space weather events and their monitoring
(2020)EGUsphereMultiple space geodetic techniques are capable of measuring effects caused by space weather events. In particular, space weather events can cause ionospheric disturbances correlated with variations in the vertical total electron content (VTEC) or the electron density (Ne) of the ionosphere. In this regard and in the context of the new Focus Area on Geodetic Space Weather Research within IAG’s GGOS (International Association of Geodesy; ...Other Conference Item -
Geocenter Motion from a Combination of GRACE Mascon and SLR Data
(2020)EGUsphereGRACE and GRACE Follow-On (FO) Level 2 data provide quasi-monthly, band-limited estimates of Stokes (geopotential, spherical harmonic) coefficients mostly reflecting surface mass variability due to non-tidal atmosphere, ocean, and continental hydrology. Although space gravimetry does not directly provide CM-related degree-1 Stokes coefficients, GRACE data have been successfully used over the years to complement time series of station ...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