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Aktivní IP geolokace pro verifikaci pozic stanic v Internetu / Active IP Geolocation for Verification Host Position in InternetBalej, Jiří January 2017 (has links)
Dissertation thesis deals with methods for finding the location of the device in the Internet, based on knowledge of the IP address. The process is called IP geolocation and is currently solved by geolocation databases or by measurement of network properties to the IP address. The disadvantage of nowadays geolocation databases is an incorrect information about some locations, because they can be in large distance from correct position. The aim of the thesis is to develop a method for verification of a position from geolocation database using delay measurement. Because of it, there is a detail analysis of influence of partial delays on the distance estimation accuracy, calculated using measured delay between the landmark and the target IP address. For the same reason, long-term delay measurement was performed, where the IP geolocation accuracy was compared using calibration data from previous measurements. On this background, Cable Length Based Geolocalisation (CLBG) method is proposed. Principle of this method is built on the properties of partial delays, which depend on the length of transport media. Firstly, the method measures round trip time (rtt), which is subsequently lowered by intermediate devices and end stations delay. The geographical distance is estimated using signal speed in the transport media. Further, the winding media parameter is established, which is used to determine a constraint around the landmark. The intersection of all constraints defines the area, where the target IP is. The IP geolocation using CLBG gives better results than simpler methods (ShortestPing, GeoPing and SOI), in comparison with more advanced methods (CBG and Octant) the accuracy is similar. The disadvantage of the CLBG method is the size of region, where the target lies, but this is due to its purpose. The position found in geolocation database can be checked by evaluation if it lies in the region.
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Snížení chyby odhadu pozice u inkrementálních lokalizačních technik / Reduction of position estimate error in incremental localization techniquesPekárek, Jan January 2011 (has links)
The diploma thesis describes localization of communications nodes in the Wireless Sensor Networks. This thesis contains basic algorithms for localization sensor's nodes as are Map-Growing and ABC (Assumption Based Coordinates). Then is chosen acceptable algorithm for simulation on random sensor networks. For research these problems is used software MATLAB. For a given the university's environment are researched appropriate algorithms with possible optimalization algorithms. The result of diploma thesis is a localization algorithm with initial multilateration system and this system is located in the center sensor's network. As algorithm IMap4-Growing (Improved Map4-Growing) with optimization, which uses optimization distance between sensors and radio range. In the diploma thesis is simulated optimalization algorithm Mass-Spring.
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Optimalizace prostředků ZLT na letišti Ostrava (náhrada pojezdového radaru) / Optimalization of the Ostrava airport ground control system (instead of its mobile approach radar)Mičkal, Ondřej January 2011 (has links)
This diploma thesis discusses and compares the current technologies and systems that are used to monitor and control movements on the airport surface. The paper presents the basic characteristics, operational principles and possibilities. Comparison provides an overview of their strengths and limitations in operational use. It also deals with this issue at the Ostrava Leos Janacek Airport, describes current situation and suggests how to solve problems associated with the introduction of CAT III precision approach and landing as well as monitoring and controlling of movements on the airfield under poor weather conditions.
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Možnosti využití ADS-B pro řízení provozu v CTR a po ploše / ADS-B and possibilities of its exploitation for the control of aircraft movement within CTR as well as along the aerodrome surfaceŠíblová, Kamila January 2015 (has links)
Diploma thesis deals with the ADS-B system and its possible use at the Airport Václav Havel in Prague. In the beginning of this thesis there is described the history leading to the introduction of this system and then the ADS-B is explained. In this thesis is also included a schedule for the introduction of the system. Them the application is presented to the airport with integrity verification, functionality, reliability and safety.
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Současný stav a směry rozvoje metod a technického zabezpečení navigace civilních letadel po ploše letiště / Existing state-of-the art and development tendencies of methods and technologies in the field of aircraft movement control along aerodrome surfaceZubrvalčík, Jan January 2021 (has links)
This diploma thesis deals with navigation on airport surface. In thesis there are described main surveillance systems, which are used for navigation on airport surface and systems for prediction and avoiding collisions. For all systems is listed principle of action, their usage, advantages and disadvantages and informations, which are provided by these systems. In last chapter there are compared properties of main surveillance systems.
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Využití SSR módu S pro řízení pohybů letadel a vozidel po ploše letiště / Exploitation of the Mode S SSR for aerodrome surface movement control of aircraft & vehiclesDrápal, Stanislav January 2015 (has links)
The topic of this thesis relates to the state-of-art technologies and systems used for airport ground movements monitoring and guidance. Emphasis is placed on mode S of SSR, its characteristics, applications and avionics requirements. This thesis further comprises analysis of Brno - Turany Airport and it presents a new multilateration system including economical analysis, which would be used for aerodrome ground movements monitoring.
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