371. Prototype of the SST-1M Telescope Structure for the Cherenkov Telescope ArrayJacek Niemiec, Andrej Filipčič, Gašper Kukec Mezek, Samo Stanič, Serguei Vorobiov, Lili Yang, Gabrijela Zaharijas, Danilo Zavrtanik, Marko Zavrtanik, 2015, published scientific conference contribution Keywords: very-high energy (VHE) gamma-ray astronomy, Cherenkov Telescope Array (CTA), small-size telescope (SST) for CTA, Davis-Cotton design Published in RUNG: 08.11.2016; Views: 4127; Downloads: 214 Full text (1,35 MB) |
372. Measurements and modeling of air mass motion in the troposphereMiha Živec, 2016, undergraduate thesis Abstract: Throughout the history human race depended on weather, so one of the priorities for its survival was to understand weather patterns and to be able to forecast weather. With the development of powerful computers, atmospheric numerical methods and precision instruments for atmospheric monitoring, it is possible to predict weather with greater accuracy and for a longer period of time ahead. At the same time, we are able to gain improved understanding of physical processes that occur in the atmosphere and represent one of most important features in our world. This diploma thesis focuses on the lowest part of the atmosphere - troposphere only, as all weather occurs in the troposphere. Weather is a complete collection of momentary thermodynamic states in the atmosphere and is defined with thermodynamic variables and relations between them.
The goal of this thesis is development and presentation of a new way to determine the direction and speed of air mass movement, based on the combination of passive and active remote sensing techniques. A lidar is being used to determine the range to an object, in our case a cloud, that can be used as a tracer in the air current. Simultaneously with lidar ranging of clouds that same clouds are being visually monitored in a series of optical photographs. Selecting and following the temporal evolution of distinct cloud features and their range allows us to calculate the speed of clouds.
The performance of this method was tested on four cases in Feb. and Mar. 2016. Measurements were performed in Ajdovščina in different weather conditions. Along with remote sensing (infra-red lidar and optical cameras), ground measurements of wind at Ajdovščina were performed. Wind speeds and directions obtained from remote sensing were compared to atmospheric sounding data from Ljubljana and Udine at similar heights and performed within as small as possible time window.
In all four cases remote sensing results for wind speeds and directions agree relatively well with atmospheric sounding. Deviations are expected to be primarily due to spatial and temporal mismatch between sounding and remote sensing measurements. Another source of uncertainties are the limitations of the present remote sensing method in the determination of the actual direction of the wind, however, theses limitations could be eliminated in the future by using an all-sky camera and vertical lidar configuration. Keywords: remote sensing, wind, atmosphere Published in RUNG: 13.10.2016; Views: 8264; Downloads: 201 Full text (9,48 MB) |
373. Origin of atmospheric aerosols at the Pierre Auger Observatory using studies of air mass trajectories in South AmericaAndrej Filipčič, Thomas Paul, Danilo Zavrtanik, Marko Zavrtanik, Samo Stanič, Darko Veberič, A. Aab, 2014, original scientific article Keywords: kozmični žarki, aerosoli, onesnaženost zraka, Observatorij Pierre Auger Published in RUNG: 16.06.2016; Views: 4993; Downloads: 16 Link to full text |
374. Studies of cosmic rays at the highest energies with the Pierre Auger ObservatoryDarko Veberič, Thomas Paul, Samo Stanič, Andrej Filipčič, Danilo Zavrtanik, Marko Zavrtanik, J. R. T. De Mello Neto, 2014, published scientific conference contribution Keywords: kozmični žarki, spekter, observatoriji Published in RUNG: 16.06.2016; Views: 3991; Downloads: 21 Link to full text |
375. A search for point sources of EeV photonsSerguei Vorobiov, Samo Stanič, Andrej Filipčič, Thomas Paul, Darko Veberič, Danilo Zavrtanik, Marko Zavrtanik, A. Aab, 2014, original scientific article Keywords: kozmični žarki, fotoni, Observatorij Pierre Auger Published in RUNG: 16.06.2016; Views: 4713; Downloads: 20 Link to full text |
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377. Muons in air showers at the Pierre Auger Observatory : measurement of atmospheric production depthSerguei Vorobiov, Darko Veberič, Andrej Filipčič, Marko Zavrtanik, Samo Stanič, Danilo Zavrtanik, A. Aab, Ahmed Saleh, 2014, original scientific article Keywords: mioni, longitudinalna porazdelitev, modeli hadronskih interakcij, Observatorij Pierre Auger Published in RUNG: 16.06.2016; Views: 4743; Downloads: 142 Link to full text |
378. Reconstruction of inclined air showers detected with the Pierre Auger ObservatorySerguei Vorobiov, Samo Stanič, Danilo Zavrtanik, Darko Veberič, Andrej Filipčič, Marko Zavrtanik, A. Aab, 2014, original scientific article Keywords: kozmični žarki, mioni, Observatorij Pierre Auger Published in RUNG: 16.06.2016; Views: 4499; Downloads: 23 Link to full text |
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380. Cosmic ray composition studies with the Pierre Auger ObservatoryThomas Paul, Samo Stanič, Darko Veberič, Andrej Filipčič, Danilo Zavrtanik, Marko Zavrtanik, D. Boncioli, 2014, published scientific conference contribution Keywords: kozmični žarki, Observatorij Pierre Auger, kompozicija Published in RUNG: 16.06.2016; Views: 4202; Downloads: 16 Link to full text |