The applications of satellites to communications, navigation and surveillance for aircraft operating over the contiguous United States. Volume 1 - Technical report

Satellite applications to aircraft communications, navigation, and surveillance over US including synthesized satellite network and aircraft equipment for air traffic contro

NASA scientific and technical publications: A catalog of special publications, reference publications, conference publications, and technical papers, 1989

This catalog lists 190 citations of all NASA Special Publications, NASA Reference Publications, NASA Conference Publications, and NASA Technical Papers that were entered into the NASA scientific and technical information database during accession year 1989. The entries are grouped by subject category. Indexes of subject terms, personal authors, and NASA report numbers are provided

A survey of self organisation in future cellular networks

This article surveys the literature over the period of the last decade on the emerging field of self organisation as applied to wireless cellular communication networks. Self organisation has been extensively studied and applied in adhoc networks, wireless sensor networks and autonomic computer networks; however in the context of wireless cellular networks, this is the first attempt to put in perspective the various efforts in form of a tutorial/survey. We provide a comprehensive survey of the existing literature, projects and standards in self organising cellular networks. Additionally, we also aim to present a clear understanding of this active research area, identifying a clear taxonomy and guidelines for design of self organising mechanisms. We compare strength and weakness of existing solutions and highlight the key research areas for further development. This paper serves as a guide and a starting point for anyone willing to delve into research on self organisation in wireless cellular communication networks

Emc aerospace systems analysis Interim scientific report

Analysis and data requirements for solving potential aerospace electromagnetic compatibility problem

Design study of a low cost civil aviation GPS receiver system

A low cost Navstar receiver system for civil aviation applications was defined. User objectives and constraints were established. Alternative navigation processing design trades were evaluated. Receiver hardware was synthesized by comparing technology projections with various candidate system designs. A control display unit design was recommended as the result of field test experience with Phase I GPS sets and a review of special human factors for general aviation users. Areas requiring technology development to ensure a low cost Navstar Set in the 1985 timeframe were identified

The Application of Ranging Techniques to Navigation and Traffic Control

During the last decade a variety of ground- and airbased radio aids have been implemented in efforts to solve major military problems in navigation and guidance, and command, control and communications. Because of significant advances in space technology and avionics, satellite-based systems to provide position-fixing data by means of ranging and range-differencing techniques, and to provide communications capability, have been shown to be feasible and attractive, and to have unique technical and operational advantages. World-wide coverage, essentially instantaneously availability, and threedimensional position-fixing accuracy of a few tens of feet seem feasible. In the civil area, demand for improved communications over the oceans, and for improved air traffic control over both the U.S. and the oceans, may be met by space-based systems. Indeed, the Office of Telecommunications Policy has recently called for a satellite telecommunications service for over-ocean aeronautical operations. A developing view supports the use of satellite-ranging techniques and satellite communications to provide for certain fundamental air traffic control functions over the U. S. in the period through the 1990s. From a satellite and data processing point of view, it appears feasible to implement in the early 1980s a system which could provide surveillance data to the order of 100 feet in three dimensions; an emergency communications capability corresponding to the operational notion of intermittent positive control; data for accurate autonomous navigation and for terminal approach and blind landing. These capabilities would be available to aircraft to an extent depending on its investment in avionics. To accomplish the implied objectives requires the establishment of organized and systematic R&D programs, including a well conceived evaluation methodology