Abstract

We present two heuristics based on constraint technology that solve the problem of generating air traffic management contingency plans, which are used in the case of a catastrophic infrastructure failure within EUROCONTROL, the European Organisation for the Safety of Air Navigation. Of the heuristics presented, one is based on constraint-based local search and tabu search, and the other one is a constraint programming and large neighbourhood search hybrid algorithm. The heuristics show that it is feasible to automate the development of contingency plans, which is currently done by human experts; this is desirable for several reasons, for example it would allow the contingency plans to be generated with an increased frequency. The generated plans were evaluated, by EUROCONTROL, to be at least as good as the human-made ones. Document type: Part of book or chapter of book

Abstract

In this paper, we present our experience of using rich and detailed models of human activity in an existing socio-technical system in the domain of air traffic control to inform a use case-based specification of an enhanced future system, called DMAN. This work was carried out as part of a real project for Eurocontrol, the European Organisation for the Safety of Air Navigation. We describe, in outline, the kinds of models we used, and present some examples of the ways in which these models influenced the specification of use cases and requirements for the future system. We end with a discussion of lessons learnt. Document type: Part of book or chapter of book

Abstract

This chapter describes the Global Navigation Satellite Systems (GNSS) used for positioning and navigation applications. Although a satellite navigation system is very complex, it is common to speak of a “satellite navigation system sensor” when referring to the tools that an end user needs in order to exploit the functionalities of a satellite navigation system, and this chapter will give a general survey of this topic. Firstly, the positioning problem within the framework of a positioning satellite system will be described. Then, general GNSS descriptions and prospects will be presented, outlining the main features of the American GPS – GNSS “gold standard”; the Russian GLONASS (revived and modernized a few years ago); the European Galileo and the Chinese Bei Dou (formerly called Compass), both successfully developing; along with the Japanese QZSS and the Indian IRNSS regional navigation satellite systems. Following these will be sections that include sources of errors and receiver structures common to all GNSS. Modernization and augmentation (GBAS and SBAS) of satellite systems are treated in a specific paragraph. Finally, some brief outlines of the aerospace applications of satellite systems will conclude the chapter. Major attention has been paid to the principles of satellite positioning, to descriptions of the measurements that can be obtained from satellite signals, the way they are processed, the effects that affect the measurements and how they propagate. These choices were motivated by the fact that their principles are common to all the GNSS and can provide the reader with the tools to approach the following subject matter. Many references are also given in the bibliography for the study of particular topics in depth, but the most recent novelties are quickly outlined because the relevant research is still ongoing and new applications are emerging. Document type: Part of book or chapter of book

Abstract

The SESAR (Single European Sky Air Traffic Management Research) Joint Undertaking has recently granted the Resilient Synthetic Vision for Ad- vanced Control Tower Air Navigation Service Provision project within the framework of the H2020 research on High Performing Airport Operations. Here- after, we describe the project motivations, the objectives, the proposed method- ology and the expected impacts, i.e. the consequences of using virtual/augmented reality technologies in the control tower. Document type: Part of book or chapter of book

Abstract

Abstract : The report covers the development of improved surveillance and communication subsystems to meet the demands of the automated NAS/ARTS Air Traffic Control system. Field measurements of the beacon interference environment were completed and studies to upgrade sensor efficiency were intensified. Effort toward the development of a discrete address interrogator with a data link was concentrated upon the core problem of designing the signaling waveforms for both up and down links of the system. Particular attention is being given to system performance in the interference and multipath environment, as well as to system and equipment compatibility with ATCRBS. The project to develop an airborne situation display of NAS/ARTS data has reached the stage for definition of an experimental system. The computer simulated cockpit display has evoked enthusiastic response from experienced pilots and traffic controllers. Preliminary work on the laser beam warning system for Logan Airport was completed with successful demonstration of the prototype hardware in the Laboratory. Document type: Report

Abstract

The air transport sector including airlines, airports and providers of air navigation services have largely been State controlled. Formerly, most airlines were State owned. However, the ownership pattern of airlines has changed gradually to the majority of the airlines being privately owned as a part of globalization and liberalization of economies. These observations can be made in the case of airports too. State owned airports are being privatized in many States due to various reasons. The trend started with the privatization of British Airports Authority (BAA) owned airports in United Kingdom (UK). Europe, Asia and Latin America are now witnessing privatization of airports on a fast track basis. Australia and New Zealand have also privatized their State owned airports in the last decade. Though the models vary depending upon the economic policy of the State, the concept of privatization or private participation in airport infrastructure is gaining momentum in these States. However, the United States of America (USA) remains an exception to this trend of airport privatization. In 2006, India joined the global trend of privatization in airport infrastructure, by privatizing two State owned airports in New Delhi and Mumbai. Though the first privately owned international airport started operations in 1999 in Kochi (Cochin),1 two other privately owned airports were operationalized in Bangalore and Hyderabad only in 2008.

Abstract

Botswana has been one of the most successful countries in the developing world over the last 40 years by many measures. Incomes have grown at a sustained pace, poverty has fallen, and the citizenry has become more educated. To be sure, poverty and income inequalities remain a problem, but rising standards of living have meant a better life for this generation of Batswana than any before it. The question facing the country leadership is whether this commendable performance can be sustained into the next generation. There are clouds on the horizon that cannot be ignored. Diamond earnings, the life blood of decades of prosperity, have flattened out. In per capita terms they are falling. Moreover, because revenues from diamonds going to the public sector have been falling for more than a decade, a growth model predicated upon an ever expanding state presence is not viable. Diamond earnings accruing to the state for subsequent redistribution have peaked. Employment and wages in the public sector have reached their natural limits as a share of Gross Domestic Product (GDP); recycling revenues from mining into the private sector, either directly or through the financial sector, has been inefficient with low social returns; and redistributive mechanisms to support social safety nets are also likely be approaching their limits. The country confronts the challenge of looking for new sources of growth outside of government.