Urban montane valleys are often characterized by periodic wintertime temperature inversions (cold air pools) that increase atmospheric particulate matter concentrations, potentially stimulating the deposition of major ions to these snow-covered ecosystems. We assessed spatial and temporal patterns of ion concentrations in snow across urban to montane gradients in Salt Lake City, Utah, USA, and ...

The Global Positioning System (GPS) is unreliable in dense urban areas, known as urban canyons, which have tall buildings or narrow streets. This is because the buildings block the signals from many of the satellites. Combining GPS with other Global Navigation Satellite Systems (GNSS) significantly increases the availability of direct line-of-sight signals. Modelling is used to demonstrate that...

Wavelet analysis is tested using the data from a simulation of turbulent atmospheric boundary performed in a wind channel. Model of urban streets is positioned on the test section floor. The large size of the model has led to high value of the roughness. Experiment involves hot-wire (HWA) and time-resolved Particle Image Velocimetry (TR-PIV) measurements inside the street canyon. Wavelet analys...

Ambient nitrogen dioxide (NO2) concentrations are regularly measured at only two monitoring stations in the city centre of Ljubljana, and such scanty data are inadequate for drawing conclusions about spatial patterns of pollution within the city, or to decide on effective measures to further improve air quality. In order to determine the spatial distribution of NO2 concentrations in different t...

Light Detection and Ranging (LiDAR) based Simultaneous Localization Mapping (SLAM) has drawn increasing interests in autonomous driving. However, LiDAR-SLAM suffers from accumulating errors which can be significantly mitigated by Global Navigation Satellite System (GNSS). Precise Point Positioning (PPP), an accurate GNSS operation mode independent of base stations, gains growing popularity unma...

A general proecological urban road traffic control idea for the street canyon is proposed with emphasis placed on development of advanced continuum field gasdynamical (hydrodynamical) control model of the street canyon. The continuum field model of optimal control of street canyon is studied. The mathematical physics' approach (Eu-lerian approach) to vehicular movement, to pollutants' emission,...

Abstract This paper provides a multiple sensor dataset collected by the CyborgLOC team during intermediate competition of Challenge MALIN (MAitrise de la localisation INdoor), which is for indoor/outdoor real-time positioning. The sensors, including GNSS receiver Ublox NEO-M8N, Realsense D435i stereo camera, three Xsens MTi-300 and one PERSY (PEdestrian Reference SYstem), are mounted on differe...

Comparative study of measured and modelled number concentrations of 1 nanoparticles in an urban street canyon 2 Prashant Kumar , Andrew Garmory, Matthias Ketzel, Ruwim Berkowicz, and Rex Britter 3 Department of Engineering, University of Cambridge, CB2 1PZ Cambridge, United Kingdom 4 School of Engineering, University of Surrey, Guildford GU2 7XH, United Kingdom 5 Department of Atmospheric Envir...

The GNSS performance could be significantly degraded by the interferences in an urban canyon, such as blockage of direct signal and measurement error due to reflected signals. Such can hardly predicted statistical or physical models, making positioning unable achieve satisfactory accuracy. deep learning networks, specializing extracting abstract representations from data, may learn representati...