Global ETD Search

1	Kommunikationsgränssnitt mot GP&C transponder / Communication interface to a GP&C transponder Johansson, Anders January 2002 (has links) <p>Examensarbetet som beskrivs i denna rapport handlar om en ny teknik för att förbättra säkerheten för flygplan i luften och i närheten av flygplatser. Denna teknik benämns ADS-B (Automatic Dependent Surveillance Broadcast), och är tänkt att göra det möjligt för piloter att själva få information om trafik i närområdet. Nuvarande system baserar sig i huvudsak på visuella observationer från flygledare i kontrolltorn samt radarspaning omkring flygplatserna. Med det nuvarande systemet kommer det att bli både dyrt och svårt att upprätthålla en acceptabel nivå på flygsäkerheten när trafiken ökar. </p><p>Arbetet har bedrivits i AerotechTelubs regi i Linköping samt med hjälp ifrån företaget Sectra Wireless Technologies AB. Huvuddelen av arbetet inriktar sig på implementerandet av C-funktioner för att hantera kommunikationen och sammankopplandet av ett tidigare skapat system, för grafikvisning, med en transponder som hanterar ADS-B (tillverkad av Sectra). Målet med detta var att göra förberedande arbete åt AerotechTelub som de förhoppningsvis kommer att kunna använda i ett eventuellt kommande projekt. Rapporten tar upp några standarder som hör till konceptet GP&C (Global Positioning & Communication), samt beskriver de delar som ligger till grund för programmets funktion. </p><p>Examensarbetet har resulterat i ett demonstrationsprogram för att visa hur en lösning av problemet kan se ut. Det har tyvärr inte gått att säkerställa om programmet fungerar till fullo, men genom simuleringar och andra tester har huvuddelen av programmets funktioner gått att verifiera.</p> Datavetenskap STDMA VDL Mode4 VIP ADS-B FIS-B GNSS GPS Datavetenskap Computer science Datavetenskap
2	Kommunikationsgränssnitt mot GP&C transponder / Communication interface to a GP&C transponder Johansson, Anders January 2002 (has links) Examensarbetet som beskrivs i denna rapport handlar om en ny teknik för att förbättra säkerheten för flygplan i luften och i närheten av flygplatser. Denna teknik benämns ADS-B (Automatic Dependent Surveillance Broadcast), och är tänkt att göra det möjligt för piloter att själva få information om trafik i närområdet. Nuvarande system baserar sig i huvudsak på visuella observationer från flygledare i kontrolltorn samt radarspaning omkring flygplatserna. Med det nuvarande systemet kommer det att bli både dyrt och svårt att upprätthålla en acceptabel nivå på flygsäkerheten när trafiken ökar. Arbetet har bedrivits i AerotechTelubs regi i Linköping samt med hjälp ifrån företaget Sectra Wireless Technologies AB. Huvuddelen av arbetet inriktar sig på implementerandet av C-funktioner för att hantera kommunikationen och sammankopplandet av ett tidigare skapat system, för grafikvisning, med en transponder som hanterar ADS-B (tillverkad av Sectra). Målet med detta var att göra förberedande arbete åt AerotechTelub som de förhoppningsvis kommer att kunna använda i ett eventuellt kommande projekt. Rapporten tar upp några standarder som hör till konceptet GP&C (Global Positioning & Communication), samt beskriver de delar som ligger till grund för programmets funktion. Examensarbetet har resulterat i ett demonstrationsprogram för att visa hur en lösning av problemet kan se ut. Det har tyvärr inte gått att säkerställa om programmet fungerar till fullo, men genom simuleringar och andra tester har huvuddelen av programmets funktioner gått att verifiera. Datavetenskap STDMA VDL Mode4 VIP ADS-B FIS-B GNSS GPS Datavetenskap Computer Sciences Datavetenskap (datalogi)
3	An Experimental Application of Formal Concept Analysis to Research Communities Kiraly, Bret D. 10 December 2008 (has links) No description available. Computer Science formal concept analysis FCA VDL social network analysis research community
4	Increased Capacity for VDL Mode 2 Aeronautical Data Communication Deric, Sanjin 09 August 2013 (has links) No description available. Aerospace Engineering Electrical Engineering Engineering Technical Communication VDL Mode 2 VDL2 VDL M2 aeronautical communication frequency reuse capacity frequency planning NextGen Data Comm OPNET Simulation co-channel interference aircraft FAA NAS National Airspace System
5	Etude de l'influence d'une onde sur les échelles de turbulence : Application à la houle Murzyn, Frédéric 10 May 2002 (has links) (PDF) Dans le but de prédire les mouvements sédimentaires en environnements côtiers, l'interaction entre les particules et la turbulence doit être mieux comprise. Bien que des études précédentes aient démontré l'importance des échelles de turbulence sur le transport sédimentaire pour les écoulements de type "courant", il n'existe que très peu de travaux sur les écoulements de houle et courant superposés. Le but de cette thèse, menée d'un point de vue expérimental en canal à houle et/ou courant, est donc d'apporter de nouvelles informations permettant de mieux caractériser l'action de la houle sur les échelles de turbulence, lesquelles influencent les mouvements particulaires. Pour cela, nous avons, dans un premier temps, étudié par Vélocimétrie Laser les échelles de turbulence produites à l'aval d'une grille dans un écoulement à surface libre type "courant continu". Dans la seconde partie de nos expériences, nous avons superposé une houle monochromatique à ce courant. A l'aide d'une nouvelle technique de corrélation, l'action de la houle sur les échelles de turbulence a pu être étudiée. Nos résultats mettent principalement en valeur une modulation de la turbulence par la houle que nous avons pu caractériser pour différentes périodes et amplitudes de houle. La principale conclusion de ce travail est que, pour traiter des problèmes de transport sédimentaire en milieu côtier ou estuarien, une variation temporelle de la taille des échelles de turbulence doit être prise en compte. Mécanique des fluides turbulence houle courant échelles de turbulence mesures VDL
6	A server application for Traffic Information Service : Broadcast / Serverprogramvara för TIS-B : en del av framtidens flygledningssystem Antonsson, Daniel January 2003 (has links) <p>The need for increased safety and efficiency in civil aviation is pushing the introduction of Automatic Dependent Surveillance - Broadcast (ADS-B). The basic principle of ADS-B is that each aircraft is able to communicate its position and status over a radio data link to surrounding aircraft. In this way each aircraft obtains a detailed picture of the surrounding traffic. During a period of transition from today's radar surveillance to ADS-B many aircraft will not be equipped with the new data link technology and will therefore be invisible to the ADS-B equipped aircraft. The Traffic Information Service - Broadcast (TIS-B) has been conceived to be the solution to this problem. TIS-B is defined as a broadcast surveillance service in which data from the ordinary ground radar system is transmitted from a ground station to airborne systems, providing an air situation picture of the non-ADS-B stations. </p><p>The topics of this thesis are the definition and implementation of a TIS-B server. The presented solution is an evaluation TIS-B server that will receive data from a data-fusing tracker and provide one or several TIS-B ground stations with data filtered according to the settings of the server.</p> Datorteknik TIS-B ADS-B ATM CNS ASTERIX VDL mode 4 software application Datorteknik Computer engineering Datorteknik
7	A server application for Traffic Information Service : Broadcast / Serverprogramvara för TIS-B : en del av framtidens flygledningssystem Antonsson, Daniel January 2003 (has links) The need for increased safety and efficiency in civil aviation is pushing the introduction of Automatic Dependent Surveillance - Broadcast (ADS-B). The basic principle of ADS-B is that each aircraft is able to communicate its position and status over a radio data link to surrounding aircraft. In this way each aircraft obtains a detailed picture of the surrounding traffic. During a period of transition from today's radar surveillance to ADS-B many aircraft will not be equipped with the new data link technology and will therefore be invisible to the ADS-B equipped aircraft. The Traffic Information Service - Broadcast (TIS-B) has been conceived to be the solution to this problem. TIS-B is defined as a broadcast surveillance service in which data from the ordinary ground radar system is transmitted from a ground station to airborne systems, providing an air situation picture of the non-ADS-B stations. The topics of this thesis are the definition and implementation of a TIS-B server. The presented solution is an evaluation TIS-B server that will receive data from a data-fusing tracker and provide one or several TIS-B ground stations with data filtered according to the settings of the server. Datorteknik TIS-B ADS-B ATM CNS ASTERIX VDL mode 4 software application Datorteknik Computer Engineering Datorteknik
8	Technical Verification and Validation of TIS-B using VDL Mode 4 Fredriksson, Daniel, Schweitz, Anders January 2004 (has links) <p>This report is a technical verification and validation of Traffic Information Service Broadcast (TIS-B) using the data link VDL Mode 4. </p><p>The main objective of the report is to examine the usefulness of TIS-B considering the results from tests performed in the Stockholm Terminal Area and for the Advanced Surface Movement Guidance and Control System (A-SMGCS) at Arlanda airport. The results are compared with the requirements that have been set by the standardisation organisations ICAO, RTCA, Eurocontrol and Eurocae. TIS-B is however such a new concept, so most of the operational requirements have not yet been defined.</p><p>The process for performing the evaluation of TIS-B involves three stages: </p><p>· Study the requirements on TIS-B, ADS-B, radar and A-SMGCS. </p><p>· Verify TIS-B by performing tests at Arlanda airport. </p><p>· Validate the test results through analysis. </p><p>A theoretical study of slot allocation optimisation is performed to decide how the slot allocation is to be implemented. </p><p>The report includes a Functional Hazard Analysis (FHA). The FHA is done to see if the applications for TIS-B are ready for implementation or if more hazard preventing actions has to be taken, before any operational actions can be performed. </p><p>The report also involves a theoretical introduction to Air Traffic Management (ATM), Surveillance techniques and TIS-B. </p><p>All parts included in the report results in conclusions and recommendations regarding the TIS-B service.</p> Technology VDL Mode 4 TIS-B A-SMGCS SCAA Arlanda Luftfartsverket NUP II STDMA FHA transceiver Slot allocation Traffic Information Service Broadcast ADS-B ASAS SSR SMR PSR TEKNIKVETENSKAP TECHNOLOGY TEKNIKVETENSKAP
9	Technical Verification and Validation of ADS-B/VDL Mode 4 for En-route Airspace and Major Terminal Areas Granberg, Petter, Li, Roger January 2002 (has links) This report is a technical verification and validation of Automatic Dependent Surveillance – Broadcast (ADS-B) over Very High Frequency Data Link Mode 4 (VDL Mode 4) for the use as surveillance in terminal areas and en-route airspace in non-radar areas. The main objective is to verify that ADS-B/VDL Mode 4 fulfils the technical requirements for an implementation at Kiruna airport, Sweden. Comparison has been made to the current requirements for Secondary Surveillance Radar (SSR). The work in this report has been conducted in three phases: preliminary study, tests and verification and validation. During the preliminary study documents primarily from EUROCONTROL and ICAO were used to find out which requirements that were applicable. The next part consisted of both practical tests and theoretical verification of the VDL Mode 4 performance. Finally the results from the tests were validated and put together in this report. Main conclusion from this report is that ADS-B/VDL Mode 4 fulfils the corresponding SSR requirements. Therefore ADS-B/VDL Mode 4 should be able to serve as primary mean for surveillance in non-radar areas. The results from this report will constitute a part of the technical subset of future safety case for ADS-B in non-radar areas. The complete safety case will be used to authorize ADS-B/VDL Mode 4 in non-radar airspace, both in Sweden and internationally. ADS-B Accuracy ATM Availability CAA Continuity Coverage En-route Airspace GNSS GPS Integrity Kiruna Latency Luftfartsverket Radar SSR Terminal Area Transceiver Transponder Validation VDL Mode 4 Verification TECHNOLOGY TEKNIKVETENSKAP
10	Technical Verification and Validation of ADS-B/VDL Mode 4 for A-SMGCS / Teknisk verifiering och validering av ADS-B/VDL Mode 4 för A-SMGCS Eriksson, Matts, Lundmark, Jonas January 2002 (has links) This report is a technical verification and validation of ADS-B (Automatic Dependent Surveillance – Broadcast) over VDL Mode 4 (Very High Frequency Data Link Mode 4) for the use in the surveillance element of an A-SMGCS (Advanced Surface Movement Guidance and Control System). The main objective of this report is to examine if ADS-B/VDL Mode 4 fulfils the technical requirements for an implementation at Arlanda airport, Stockholm Sweden. The report also includes a FMECA (Failure Mode, Effects and Criticality Analysis), a theoretical background and methods for monitoring. The process of making this report can be divided into three phases: 1. Preliminary Study. In this phase the requirements were examined and structured. 2. Verification. In this phase the system performance has been verified both theoretically and by several tests at Arlanda Airport. Simulation results have also been used. 3. Validation and documentation. The tests and verifications that were performed in phase 2 were validated in the third phase of the project. The final project document was also written in this phase. The main conclusion from this analysis is that ADS-B/VDL Mode 4 is well suited for surveillance. ADS-B/VDL Mode 4 has the possibility to fulfil all considered requirements, apart from detecting all obstacles. But if all the requirements are going to be fulfilled depends both on the implementation and the operational environment. The results from this verification and validation should be used as the technical subset in a future safety case, both in Sweden and internationally. Technology VDL Mode 4 ADS-B A-SMGCS SMGCS Swedish Civil Aviation Administration SCAA Luftfartsverket NUP NUP II MAC STDMA FMECA GPS Surveillance Transceiver Transponder Monitoring Arlanda TEKNIKVETENSKAP TECHNOLOGY TEKNIKVETENSKAP

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