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Prof. Laura Valore (INFN Sezione di Napoli and University of Napoli Federico II)28/07/2026, 11:00
The attenuation of the fluorescence light in atmosphere due to the presence of aerosols is continuously monitored at the Pierre Auger Observatory with the two distant laser facilites, the Central Laser Facility (CLF) and the eXtreme Laser Facility (XLF). The long-time aerosol attenuation conditions measured in 19 years of operation, and used in the reconstruction of cosmic-ray events...
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Roberto Mussa (INFN Torino)28/07/2026, 11:30
Horizontal elastic lidar shots towards the Pierre Auger Observatory array, taken every hour, are useful for measuring the homogeneity of the aerosol extinction coefficient at ground level. They also serve to parametrize the relative alignment between laser beam and the mirrors collecting the backscattered light, by studying the variation of the overlap function with azimuth and elevation...
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Thara Rubi Caba Pineda (KIT)28/07/2026, 13:30
The Atmospheric Lidar (ATLID) onboard the Earth Cloud, Aerosol and Radiation Explorer (EarthCARE) has been repeatedly observed by the Fluorescence Detectors of the Pierre Auger Observatory. Side-scattered ultraviolet light from ATLID laser pulses is recorded by the Auger fluorescence telescopes, which are primarily designed to measure the longitudinal development of extensive air showers...
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Vincenzo Rizi (DSFC/UNIVAQ and INFN-LNGS)28/07/2026, 14:00
Accurate, height-resolved atmospheric characterization is a critical requirement for the reconstruction of extensive air showers and Cherenkov light in ground-based high-energy astroparticle observatories. Raman lidar systems, based on Nd:YAG laser emitters and elastic plus inelastic (Raman) detection channels, provide direct measurements of vertical profiles of aerosol extinction and...
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Dr Georges Vasileiadis (CNRS/LUPM)28/07/2026, 14:30
The Montpellier Raman Lidar is a prototype in its final form, designed and built to fulfil the requirements of CTAO. It will provide atmospheric profiles at 355, 387, 532, and 607 nm. It incorporate two distinctive design elements, a gated photomultiplier protocol to avoid excessive light coming from very low altitudes and an automatic alignement system. It is ment to be installed at the...
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Markus Gaug (Universitat Autònoma de Barcelona and CERES-IEEC)28/07/2026, 15:30
Accurate characterisation of the aerosol extinction profile is critical for ground-based gamma-ray observatories, where atmospheric transmittance directly affects the reconstruction of gamma-ray shower energies and the observatory's acceptance. The Cherenkov Telescope Array Observatory (CTAO) requires continuous aerosol profiling with range resolution better than a few hundred metres and...
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Darko Kolar (Center for Astrophysics and Cosmology, University of Nova Gorica)28/07/2026, 16:00
The Barcelona Raman LIDAR (BRL) system, which is being developed for the Cherenkov Telescope Array Observatory (CTAO) relies on photomultiplier tubes (PMTs) to detect weak optical signals backscattered by atmospheric molecules and aerosols. As aerosol transmission constitutes a major source of systematic uncertainty, efficient photon detection in the LIDAR receiver is essential to achieve the...
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Vlastimil Jílek (Joint Laboratory of Optics)28/07/2026, 16:30
For astroparticle projects that utilize the Earth's atmosphere as a calorimeter for detecting cosmic rays, real-time knowledge of atmospheric conditions and optical properties is essential. The ceilometer, a commercial meteorological lidar typically used for measuring cloud base height, vertical visibility, and cloud cover, represents a robust tool for characterizing the aerosol content of the...
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