Conveners
Analysis techniques and simulations for atmospheric characterization
- Laura Valore (Istituto Nazionale di Fisica Nucleare)
Analysis techniques and simulations for atmospheric characterization
- Vincenzo Rizi (Istituto Nazionale di Fisica Nucleare)
Analysis techniques and simulations for atmospheric characterization
- Roberto Mussa (Istituto Nazionale di Fisica Nucleare)
Analysis techniques and simulations for atmospheric characterization
- Markus Gaug (Universitat Autònoma de Barcelona & IEEC-CERES)
The measurements of the vertical profiles of the atmospheric aerosol optical properties (i.e., the extinction and the backscatter coefficients) and water vapour mixing ratio, are based on the well-known single scattering lidar equation. The Raman scattering is an inelastic pure molecular scattering that has been successfully used in lidar remote-sensing techniques since the late 1960s. Focused...
For the pre-production phase of Cherenkov Telescope Array (CTA), the INFN Raman Lidar (IRL) has collected vertical profiles of aerosol optical properties in the UV region at Roque de los Muchachos Observatory (ORM) up to December 2022, in automatic and unattended mode.
The data analysis has been tested and improved also by comparison with the measurements of the nearly located AERONET...
The Cherenkov Telescope Array (CTA) is the next generation observatory of ground-based Imaging Atmospheric Cherenkov Telescopes (IACTs). The observatory, currently under construction, will be composed of more than 70 telescopes at two locations: in the northern hemisphere, CTAO-N at the Observatorio del Roque de Los Muchachos (ORM, La Palma, Canary Islands, Spain), and in the southern...
The observations of a Raman Lidar at the Pierre Auger Observatory in the Argentinian Pampa are reported. The Raman Lidar is utilized for real-time atmospheric monitoring along the detection of cosmic-ray air showers. The vertical profiles of the water vapor mixing ratio, aerosol optical depth, and the aerosol backscatter are presented and discussed, for an observation time of 7 years...
As aerosols influence the optical transmission properties of the atmosphere, variations in atmospheric aerosols yield variations in the signals from extensive air-showers (EAS) measured with imaging atmospheric Cherenkov telescopes (IACTs).
With the optical transmission of the atmosphere affecting the amount of Cherenkov light reaching IACTs, wrongly accounted aerosol levels yield a...
The future Cherenkov Gamma Ray experiment CTA will reach a sensitivity and energy resolution never obtained until now by any other high energy gamma–ray experiment. Raman lidars can help reduce the systematic uncertainties of the molecular and aerosol components of the atmosphere so these performances can be reached. The motivation for Raman lidars and the design and development of the...
Recent developments for the atmospheric monitoring at the Pierre Auger Observatory will be presented. These developments include new methods for cloud identification, and a status of our suit of instruments for atmospheric monitoring and the application of these data to air shower physics.
The Imaging Atmospheric Cherenkov Telescopes observational technique employs the atmosphere as part of the detector, thus it is sensitive to all the changes taking place in it. Particularly, in the presence of clouds, the detector registers incomplete and degraded information caused by additional light absorption. Such observations are often rejected from further analysis process due to...
We present a novel method to determine the atmospheric transmission profile from the isotropic background events detected by the Imaging Atmospheric Cherenkov Telescopes. We construct a longitudinal distribution of the observed Cherenkov light by relating its emission height to a specific pixel in the camera. For this, we use a simple geometric model based on the parameters of the air shower....
The visibility of stars is often used for cloud detection using all-sky cameras, which have however only a limited reach and resolution near the horizon due to the lack of detectable stars. At the Pierre Auger Observatory, it is also used by the current generation of FRAM robotic telescopes, but – due to their limited field of view – only for a small number of selected showers. Thanks to the...
