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Interactive web application for displaying of rainfall maps
Soboňa, Jakub ; Kohout, David (referee) ; Bubniak, Milan (advisor)
Táto bakalárska práca sa zaoberá vytvorením interaktívnej webovej aplikácie pre zobrazenie zrážkových máp. Zrážkové mapy sú vytvorené z dát nameraných sieťou komerčných mikrovlnných spojov, preto sa teoretická časť zaoberá mikrovlnnými spojmi a oportunistickými meraniami zrážok. Frontend aplikácie je spravený použitím JavaScriptovej knižnice React spolu s HTML a CSS. Backend je spravený použitím Node.js a Express.js. Implementácia a funkcionalita tejto aplikácie je ukázaná v práci.
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Automated area measurement of precipitation intensity via a network of microwave links
Bubniak, Milan ; Pospíšil, Ondřej (referee) ; Musil, Petr (advisor)
Point-to-point microwave links can be utilized as a large sensor network to measure rainfall. This work deals with the application of this procedure in practice. The first part of the thesis deals with atmospheric precipitation in general and standard methods of their measurement; and the propagation of the microwave signal and various causes of its attenuation, focusing on the attenuation caused by rain and the recommendation ITU-R P.838. This is followed by a state of the art summarization of the measurement of rainfall by microwave links. In the second part of the work, a manual procedure for calculating rainfall from microwave link data is performed, taking wet antenna attenuation into account. Then the creation of a support tool in the C# language is being described, which supply the data to the functions of the RAINLINK rainfall calculation library. Several rainfall calculations that are validated by physical rain gauges are performed. Furthermore, the own Telcorain application for rainfall calculation is created in the Python language, based on the pycomlink library. It has a graphical user interface created in PyQt. Several rainfall calculations validated by rain gauges are performed again, and the results are compared with the RAINLINK library.
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Modulator and demodulator for microwave link
Martinec, Matěj ; Frydrych, Jiří (referee) ; Záplata, Filip (advisor)
This work is dealing with the design of intermediate part of transmitter and reciever that use digital BPSK and QPSK modulations for microwave link that works in 24 – 26 GHz bands. Besides choosing the suitable modulator and demodulator there was need to provide proper connection of this part with transceiver Nortel CTR26-01M. Input and output of this intermediate part was take out to baseband, where was need to ensure the transfer of diferential inputs of modulator and demodulator to symetric leading for reason of data communication with PC, for which was created the algorithms to provide transmitting and receiving data. Complete structure controlled by the microcontroller has been enliven and furthemore there was created the measurement of chosen parameteres.
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Application for early detection of transmission parameters degradation of microwave units
Bubniak, Milan ; Benedikt, Jan (referee) ; Musil, Petr (advisor)
Radio equipment of microwave links operating in an outdoor environment under the influence of weather conditions is at risk of a link failure or device defect occurrence, as well as their indoor units. This bachelor thesis aims to present the creation of a~network monitoring application capable of timely detection of potential failures, based on analyzing trends in monitored device parameters. The theory section deals with basic characteristics of microwave links and the structure of Simple Network Management Protocol. The practical section describes an application design, including core architecture, as well as a graphical user interface. Several failure detection methods are designed and described. In the next section, practice monitoring results are presended. Furthermore, network traffic and data storage requirements are measured. The conclusion summarizes the results of the application development and outlines it's future with new possible features.
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Research of Algorithms for Improvement of Rainfall Calculation Based on Crossing of Microwave Links
Vomočil, Radek ; Mikulášek, Michal (referee) ; Bubniak, Milan (advisor)
Even in modern times, the exact rainfall calculation is an area containing a number of challenges. Although it may seem that the combined technologies for rainfall estimation are sufficiently accurate, in recent years there have been opportunities to further complement and refine the rainfall estimation through so-called opportunistic methods. This work deals with the creation of a new algorithm for the distribution of rainfall intensity within the framework of rainfall measurement through a network of microwave links. The theoretical part of the work deals with the possible ways in which the algorithm can be created and in what ways the calculation of rainfall can be approached. The practical part first deals with the creation of an algorithm for the linear distribution of rainfall intensity in 2D space along the route of the microwave link, based on the input parameter of the interval length. This is followed by the creation and implementation of an algorithm for the distribution of rainfall intensity based on the crossing of microwave links.
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Research of Algorithms for Improvement of Rainfall Calculation Based on Crossing of Microwave Links
Vomočil, Radek ; Mikulášek, Michal (referee) ; Bubniak, Milan (advisor)
Even in modern times, the exact rainfall calculation is an area containing a number of challenges. Although it may seem that the combined technologies for rainfall estimation are sufficiently accurate, in recent years there have been opportunities to further complement and refine the rainfall estimation through so-called opportunistic methods. This work deals with the creation of a new algorithm for the distribution of rainfall intensity within the framework of rainfall measurement through a network of microwave links. The theoretical part of the work deals with the possible ways in which the algorithm can be created and in what ways the calculation of rainfall can be approached. The practical part first deals with the creation of an algorithm for the linear distribution of rainfall intensity in 2D space along the route of the microwave link, based on the input parameter of the interval length. This is followed by the creation and implementation of an algorithm for the distribution of rainfall intensity based on the crossing of microwave links.
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Interactive web application for displaying of rainfall maps
Soboňa, Jakub ; Kohout, David (referee) ; Bubniak, Milan (advisor)
Táto bakalárska práca sa zaoberá vytvorením interaktívnej webovej aplikácie pre zobrazenie zrážkových máp. Zrážkové mapy sú vytvorené z dát nameraných sieťou komerčných mikrovlnných spojov, preto sa teoretická časť zaoberá mikrovlnnými spojmi a oportunistickými meraniami zrážok. Frontend aplikácie je spravený použitím JavaScriptovej knižnice React spolu s HTML a CSS. Backend je spravený použitím Node.js a Express.js. Implementácia a funkcionalita tejto aplikácie je ukázaná v práci.
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Compensation of Temperature Instability of the Received Signal Level of Microwave Links
Repa, Pavol ; Musil, Petr (referee) ; Bubniak, Milan (advisor)
This thesis deals with the field of microwave links. Specifically, it is concerned with compensating for the temperature instability of the received signal level of microwave links. This problem is solved according to the proposed algorithm, which can be used to suppress the temperature waveforms, and thus achieve better results in the calculation of collisions in the Telcorain software application. A compensation algorithm has been developed to compensate for microwave links with strong temperature dependence. By~compensating for these non-compliant microwave links, it was possible to reuse them in the calculation of the average rainfall intensity, and hence they were retained in~the~generation of the 2D rainfall maps. The compensation algorithm is implemented in the~Telcorain application, where the individual results of the precipitation calculation can be verified. Throughout the thesis, microwave joints from two manufacturers, each with a~different technology used, were analysed. Their comparison with each other is~the~focus of this thesis, in which the individual differences between these microwave links are published.
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The design of an accurate rain gauge with the ability of real-time reading
Jílek, Jiří ; Mašek, Pavel (referee) ; Možný, Radek (advisor)
Rainfall estimation using point-to-point microwave links is a promising way to expand the rain gauge network in the future. However, this opportunistic measurement method is still in the research phase and faces several problems. This paper focuses on one of the problems of this research area, namely the insufficient number of existing rain gauges on the path of the microwave link for the correlation of measured data, by designing a portable rain gauge using data transmission to a remote server using narrowband internet of things (NB-IoT ) technology. To expand its capabilities, the device is also equipped with temperature sensors and a light level sensor. The device is designed with an emphasis on desirable low energy consumption, as it should be able to measure data even without the reach of the electrical network. The outcome of this work is the verification of the functionality of the device in a real environment and the evaluation of its suitability for the intended use case.
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Research on Methods for Quantifying Attenuation due to the Wet Antenna Effect
Skoumal, Vladimír ; Dvořák, Radim (referee) ; Bubniak, Milan (advisor)
The topic is the calculation of precipitation using commercial microwave links. Since current techniques in meteorology are not perfect, this way of measurement can be a suitable complement to meteorological instruments. One of the current problems is wet antenna attenuation. This is an excess attenuation that affects the final precipitation calculation. In the first part of the thesis, microwave connections are generally described, how they look, how they are put into operation and their important parameters. Furthermore, this section contains a theoretical analysis of precipitation, various types of measurement of this quantity, and a description of the possibilities of measuring precipitation using microwave links. An important theoretical part is the description of the methods for calculating the WAA or wet antenna attenuation, where the Schleiss, Leijnse and Pastorek methods are described. Furthermore, freely usable libraries are described in the work, which contain functions for calculations of precipitation using microwave links. The last theoretical part describes the Telcorain application, which is used to calculate precipitation at this work. The second part of this work contains the changes made in the code of the Telcorain application. It also contains a comparison of WAA methods for calculating precipitation as well as variously selected sets of microwave links for different rain events and development development of own method for WAA calculation.
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