News

IGiG scientific seminar - Prof. Kefei Zhang

18-09-2024

IGiG is pleased to invite you to a scientific seminar, which will take place in a hybrid format, on Thursday (September 19th, 2024) at 9:00 AM. Prof. Kefei Zhang (School of Environment and Spatial Informatics, China University of Mining and Technology) will present the topic "Space Resources Exploitation and Utilization - A Geodetic Perspective".

The exploration and utilization of space resources is a new wave of international interest driven by the concern of rapid depletion of energy and resources on the earth. The US Space Resource Exploration and Utilization Act in 2015 was a tipping point for the accelerated process of new space competition. Pilot effort has been made by major space powers and sample-return missions have been launched/planned so far by Japan (Hayabusa), USA(OSIRIS-Rex), ESA (Rosetta) and China (Tianwen #2). The primary purposes of extra-terrestrial mining are to search for valuable and precious and rare minerals/metals, in particular those platinum group metals (e.g. ruthenium, rhodium, palladium, osmium and iridium) that are critically needed for the sustainable development of the society, from asteroids and minor planets that are close to the earth. geospatial science and technology, geodesy and remote sensing in particular, plays a critical role in this huge space mining systematic engineering endeavor, as is the case of surveying for large-scale engineering projects.

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GNSS Summer School in Slovenia

09-08-2024

We are proud to share that several of our students recently participated in the Global Navigation Satellite Systems (GNSS) Summer School, which lasts for 10 days, organized by the European Space Agency (ESA) and the Joint Research Centre (JCR) in Slovenia.

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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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