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Il \Galileo Galilei Institute for Teoretical Physics\ di Arcetri/The Galileo Galilei Institute for Theoretical Physics in Arcetri
Sulla collina di Arcetri nasce nel 2005 il \"Galileo Galilei Institute for Teoretical Physics\" (GGI), il primo Istituto Europeo dedicato a programmi di formazione e ricerca su argomenti di punta della fisica teorica. Ospitato nei locali dell'edificio \"Garbasso\", ex-sede storica dell'Istituto di Fisica di Firenze, il GGI è un punto di riferimento per la comunità scientifica internazionale. Parole chiave. Fisica teorica, attività di ricerca e formazione, scuole internazionali di dottorato. The \"Galileo Galilei Institute for Theoretical Physics\" (GGI), the first European Institute dedicated to training and research in leading topics in theoretical physics, was founded on Arcetri hill in 2005. Housed in the \"Garbasso\" building, the former headquarters of the Institute of Physics in Florence, the GGI is a point of reference for the international scientific community. Keywords. Theoretical physics, research and training activities, international PhD schools.
Journal Article
SHE-SCIENCE. La scienza al femminile: Scienziate e scienziati, artiste e artisti per approfondire il contributo delle donne nella scienza/Scientists and artists to analyse women's contribution to science
Parole chiave. Scienza, donne, arte, gender gap, Galileo Galilei, luna, musica, sostenibilità . Keywords. Science, women, art, gender gap, Galileo Galilei, moon, music, sustainability.
Journal Article
Galileo's Reading
Galileo (1564–1642) incorporated throughout his work the language of battle, the rhetoric of the epic, and the structure of romance as a means to elicit emotional responses from his readers against his opponents. By turning to the literary as a field for creating knowledge, Galileo delineated a textual space for establishing and validating the identity of the new, idealized philosopher. Galileo's Reading places Galileo in the complete intellectual and academic world in which he operated, bringing together, for example, debates over the nature of floating bodies and Ludovico Ariosto's Orlando furioso, disputes on comets and the literary criticism of Don Quixote, mathematical demonstrations of material strength and Dante's voyage through the afterlife, and the parallels of his feisty note-taking practices with popular comedy of the period.
eBook
Starry messenger : a book depicting the life of a famous scientist, mathematician, astronomer, philosopher, physicist, Galileo Galilei
Describes the life and work of the courageous man who changed the way people saw the galaxy, by offering objective evidence that the earth was not the fixed center of the universe.
BOOK
Orbit determination of Sentinel-6A using the Galileo high accuracy service test signal
The High Accuracy Service (HAS) is an upcoming addition to the Galileo service portfolio that offers free correction data for precise point positioning in real-time. Beyond terrestrial and aeronautical applications, precise orbit determination (POD) of satellites in low Earth orbit (LEO) has been proposed as a potential use case for HAS corrections in view of their global availability. Based on HAS data collected during a test campaign in September 2021, the benefit of HAS corrections is assessed for real-time, onboard navigation as well as near real-time POD on the ground using GNSS observations of the Sentinel-6A LEO satellite. Compared to real-time POD using only broadcast ephemerides, performance improvements of about 40%, 10%, and 5% in terms of 3D position error can already be achieved for GPS-only, GPS + Galileo, and Galileo-only navigation. While Galileo processing benefits only moderately from the HAS correction data during the early tests in view of an already excellent Open Service performance, their use is highly advantageous for GPS processing and enables dual-constellation navigation with balanced contributions of both GNSSs for improved robustness. For near real-time offline POD, HAS corrections offer reduced latency or accuracy compared to established ultra-rapid GNSS orbit and clock products as well as independence from external sources.
Journal Article
Assessment of Galileo High Accuracy Service (HAS) test signals and preliminary positioning performance
The Galileo High Accuracy Service (HAS) is a GNSS augmentation that provides precise satellite corrections to users worldwide for free directly through Galileo’s E6 signal. The HAS service provides free PPP corrections from the Galileo constellation and the Internet, with targeted real-time 95% positioning performance of better than 20 cm horizontal and 40 cm vertical error after 5 min of convergence time globally and shorter in Europe. The HAS initial service, under validation at the time of writing, provides these capabilities with a reduced performance (based on the current Galileo stations network). Live HAS test signals broadcasted from the Galileo satellites during summer 2022 have been decoded and analyzed. Corrections include Galileo and GPS orbit, clock, and code bias corrections, with SISRE of 10.6 cm and 11.8 cm for Galileo and GPS, respectively. Code bias corrections showed good performance as well, with rms of 0.28 ns, 0.26 ns, and 0.22 ns for Galileo C1C–C5Q, C1C–C7Q, and C1C–C6C, respectively, and 0.20 ns for GPS C1C–C2L. Float PPP positioning performance results show that the combined Galileo and GPS solution can already achieve the HAS full service accuracy performance target and is close in terms of convergence time, with 95% rms of 13.1 cm and 18.6 cm horizontally and vertically, respectively, in kinematic mode, and with a 95% convergence time of 7.5 min. The latter is expected to be improved with the inclusion of satellite phase bias and local atmospheric corrections. With these early Galileo HAS test signals, this preliminary analysis indicates that the HAS full service targets are attainable. Finally, a correction latency analysis is performed, showing that even with latency of up to 60 s, positioning can remain within the targeted HAS accuracy performance.
Journal Article