News

AI-based Ensemble Troposphere Conditions Forecasting using GNSS tomography

26-06-2024

Weather phenomena forecasting is undergoing a significant transformation with the latest research, introducing a AI-based to atmospheric prediction. The new study, published in IEEE Transactions on Geoscience and Remote Sensing, marks the pioneering use of GNSS tomography for ensemble forecasting, setting a new pathway in the field. Traditional troposphere models often struggle with low spatial resolution and irregular data distribution. By leveraging GNSS troposphere tomography, the study generates high-resolution, three-dimensional wet refractivity fields, effectively addressing these critical challenges. Unlike previous deterministic models, the research employs ensemble forecasting using Generative Adversarial Networks (GAN), enhancing predictive accuracy by generating realistic time series data and providing probability-based forecasts. At the core of the model are Long Short Time Memory (LSTM) networks, optimized with Genetic Algorithms (GA), ensuring robust predictive performance

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IGiG scientific seminar - Prof. Dr. habil. Hans-Gerd Maas

20-06-2024

IGiG is pleased to invite you to a scientific seminar to be held in the IGIG library (100G) on June 27, 2024 from 9:00-10:00 a.m. The presentation, entitled "Photogrammetric techniques in civil engineering material testing" will be given by Prof. Dr. habil. Hans-Gerd Maas from TU Dresden.

Please refer to BIO to find out more about our speaker.

We look forward to seeing you all on Thursday. Please find the abstract below.

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Three-dimensional modeling of the GNSS radio occultation ray path

23-05-2024

Traditional GNSS space-based and ground-based tropospheric estimates are conducted separately, which limits the horizontal and vertical resolution of tropospheric products. This study evaluates the first step toward an integrated model: the development of an effective 3D ray-tracing algorithm for satellite-to-satellite (radio occultation) path reconstruction. Using a new approach for calculating gradients and interpolating refractivities, the authors develop a new algorithm for simulation of radio-occultation (RO) paths.

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IGiG scientific seminar - Dr. Andrea Gatti

20-05-2024

IGiG is pleased to invite you to a scientific seminar to be held in the IGIG library (100G) on May 23, 2024 from 9:00-10:00 a.m. The presentation, entitled "GNSS reflectometry applied to low-cost ground receivers" will be given by Dr. Andrea Gatti from Geomatics Research & Development (GReD), Lomazzo, Italy.

Find out more about our speaker and GReD team under the link: GReD.

We look forward to seeing you all on Thursday. See abstract below.

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MultiDEFusion: an open-source library dedicated for the integration of geodetic observations

07-05-2024

MultiDEFusion is an open-source library that enables the Fusion of Multi geodetic techniques ensuring long-term observations of ground DEFormation. The software, developed in a Python environment, enables the integration of permanent GNSS observations together with InSAR radar data.



The MultiDEFusion library expands the existing approach of integrating geodetic observations introduced in the article Tondaś et al., 2023, by allowing the simultaneous application of three InSAR computational methods: DInSAR, SBAS, and PSI. Furthermore, radar observations can be derived from three independent orbits with the possibility of implementing 9 elements (pixels or PS points) for each computational method. Detailed software documentation, including references to the trial data set, is available at https://damiantondas.github.io/multidefusion.


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