Global Navigation Satellite System Real-time Kinematic (GNSS-RTK) is an indispensable source for the absolute positioning of autonomous systems. Unfortunately, performance GNSS-RTK significantly degraded in urban canyons, due to notorious multipath and Non-Line-of-Sight (NLOS). On contrary, LiDAR/inertial odometry (LIO) can provide locally accurate pose estimation structured scenarios but subje...

The basis of this study is a new bathymetric map of the northeast Atlantic compiled from previously published maps made from conventional echosounder data, plus all Sea Beam data acquired on board the R/V JEAN CHARCOT since 1977. As most of the Sea Beam data have been obtained on the continental margin from Porcupine Seabight to the south of the Iberian Peninsula, a precise picture of the conti...

A ray tracing based cellular coverage simulator has been parallelized in order to speed up excecution. The simulator has been developed for accurate prediction of radio wave propagation in urban microcells. It combines a vertical plane model simulating the wave propagation over the buildings and a horizontal plane model simulating the wave propagation in the street canyons between the buildings...

In heavy multipath scenarios such as urban canyons, the user code phase pseudorange error due to multipath fading can be as high as two meters even for the most sophisticated ranging signals such as Galileo E5 Alternate Binary-Offset-Carrier AltBOC (15,10). In this paper the author introduces methods to mitigate the code phase multipath by exploiting the frequency diversity which is inherent to...

The concept of future-proofing cities seeks to minimise environmental impacts by utilising various mitigation and adaptation techniques, specifically improving urban fabric. Studies on forms parameters have been extensively conducted in hot, arid humid climates while they less investigated temperate climates. In the UK, current local design guides meet needs designers planners, however, are sti...

global navigation satellite system (GNSS) receivers are usually unable to achieve satisfactory performance in difficult environments, such as open-pit mines, urban canyons and indoors. Pseudolites have the potential to extend GNSS usage and significantly improve receiver performance in such environments by providing additional navigation signals. This also applies to asynchronous pseudolite sys...

We investigate the different dominant propagation mechanisms in an urban macroand microcellular base station (BS) installation with a special focus on the application of smart antennas by means of adaptive antenna array measurements. We demonstrate that the congruence of the geometrical mobile station (MS) position and the dominant direction of arrival is only fulfilled for macrocellular BS ins...

The use of wireless sensor networks for bushfire monitoring can help to map and locate fires rapidly and accurately. A Management Centre could use such information in order to deploy fire-fighters, tankers and aircraft to the best locations to protect people and communities from bushfire hazards. This paper describes an application of the GPS/INS technology to support a mobile mapping system wh...

Though GPS is the most popular positioning system at presents it does not perform well in indoor environments and urban canyons or metropolitan city areas. Wi-Fi has been accepted as one of the good candidates for indoor positioning, its performance in outdoor environment is also of interest as a Wi-Fi based positioning system can overcome the shortcomings of GPS. An experiment has been carried...

To develop reliable computer models for the bluff body flow and transport of pollutants or chemical and biological (CB) agents in urban environments requires accurate measurements of the basic flow fields for carefully controlled, well-known conditions. Fluid modeling in an Industrial Wind Tunnel provides an opportunity to produce accurate simulations of the bluff body flow and transport of urb...