Results 91 to 100 of about 46,320 (319)

Long‐Range Time‐Correlated Single‐Photon Counting Lidar 3D‐Reconstruction From a Moving Ground Vehicle

Journal of Field Robotics, EarlyView.
ABSTRACT Time‐correlated single‐photon counting (TCSPC) lidar enables high‐resolution 3D imaging at kilometer range. While previous works have covered long range TCSPC 3D imaging from either stationary or airborne platforms, this is, to the best of our knowledge, the first attempt that use a moving ground vehicle. Fusing measurements taken at different
Hannes Ovrén, Max Holmberg, Markus Henriksson   +2 more
wiley   +1 more source

A Multi Antenna Receiver for Galileo SoL Applications [PDF]

, 2008
One of the main features of the Galileo Satellite Navigation System is integrity. To ensure a reliable and robust navigation for Safety of Life applications, like CAT III aircraft landings, new receiver technologies are indispensable.
Cuntz, Manuel, Denks, Holmer, Hornbostel, Achim, Konovaltsev, Andriy, Meurer, Michael, Schroth, Arno   +5 more
core  

Secure Vehicular Communication Systems: Implementation, Performance, and Research Challenges [PDF]

, 2008
Vehicular Communication (VC) systems are on the verge of practical deployment. Nonetheless, their security and privacy protection is one of the problems that have been addressed only recently.
Buttyan, L., Calandriello, G., Held, A., Hubaux, J. -P., Kargl, F., Kung, A., Muter, M., Papadimitratos, P., Schoch, E., Thong, T. -V., Wiedersheim, B.   +10 more
core   +4 more sources

Tackling ionospheric scintillation threat to GNSS in Latin America

Journal of Space Weather and Space Climate, 2011
Scintillations are rapid fluctuations in the phase and amplitude of transionospheric radio signals which are caused by small-scale plasma density irregularities in the ionosphere.
Monico Joao Francisco Galera, Bougard Bruno, Romano Vincenzo, Spogli Luca, Alfonsi Lucilla, De Franceschi Giorgiana, Hancock Craig, Elmas Zeynep, Forte Biagio, Aquino Marcio, Sreeja Vadakke Veettil, Wernik Andrzej W., Sleewaegen Jean-Marie, Cantó Andrea, Ferreira Da Silva Elcia   +14 more
doaj   +1 more source

Why Autonomous Vehicles Are Not Ready Yet: A Multi‐Disciplinary Review of Problems, Attempted Solutions, and Future Directions

Journal of Field Robotics, EarlyView.
ABSTRACT Personal autonomous vehicles can sense their surrounding environment, plan their route, and drive with little or no involvement of human drivers. Despite the latest technological advancements and the hopeful announcements made by leading entrepreneurs, to date no personal vehicle is approved for road circulation in a “fully” or “semi ...
Xingshuai Dong, Massimiliano Cappuccio, Fady Alnajjar, Luqman Ali, Hamad Al Jassmi, Essam Debie, Milad Ghasrikhouzani, Alessandro Lanteri, Tate McGregor, Oleksandra Molloy, Alice Plebe, Michael Regan, Eduardo Sandoval, Dongmo Zhang   +13 more
wiley   +1 more source

Mapping River Bed Topography in Whitewater Rapids Using Bathymetric LiDAR

River Research and Applications, EarlyView.
ABSTRACT Bathymetric LiDAR captures river topography efficiently for clear and shallow water, but for mountain rivers, whitewater rapids still pose challenges. This study proposes a novel method to enable the extraction of bottom returns specifically in turbulent whitewater sections.
Jan Rhomberg‐Kauert, Theresa Himmelsbach, Florian Pöppl, Lucas Dammert, Martin Pfennigbauer, Gottfried Mandlburger   +5 more
wiley   +1 more source

Automated Ground Truth Estimation For Automotive Radar Tracking Applications With Portable GNSS And IMU Devices

, 2019
Baseline generation for tracking applications is a difficult task when working with real world radar data. Data sparsity usually only allows an indirect way of estimating the original tracks as most objects' centers are not represented in the data.
Appenrodt, Nils, Dickmann, Jürgen, Duraisamy, Bharanidhar, Fritzsche, Martin, Haag, Stefan, Scheiner, Nicolas, Sick, Bernhard   +6 more
core   +1 more source

Global Navigation Satellite Systems Reflectometry as a Remote Sensing Tool for Agriculture

Remote Sensing, 2012
The use of Global Navigation Satellite Systems (GNSS) signals for remote sensing applications, generally referred to as GNSS-Reflectometry (GNSS-R), is gaining increasing interest among the scientific community as a remote sensing tool for land ...
Alejandro Egido, Marco Caparrini, Giulio Ruffini, Simonetta Paloscia, Emanuele Santi, Leila Guerriero, Nazzareno Pierdicca, Nicolas Floury   +7 more
doaj   +1 more source

Integrating terrestrial and canopy laser scanning for comprehensive analysis of large old trees: Implications for single tree and biodiversity research

Remote Sensing in Ecology and Conservation, EarlyView.
Canopy laser scanning (CLS) enhances 3D measurements of large trees by lifting laser scanners into the canopy. Combining CLS with terrestrial laser scanning improves point cloud precision, reduces occlusion and enables detailed assessments of tree architecture and canopy biodiversity, opening new opportunities for forest ecology.
Barbara D'hont, Kim Calders, Alexandre Antonelli, Thomas Berg, Wout Cherlet, Karun Dayal, Olivia Jayne Fitzpatrick, Leonard Hambrecht, Maurice Leponce, Arko Lucieer, Olivier Pascal, Pasi Raumonen, Hans Verbeeck   +12 more
wiley   +1 more source

Investigating boreal forest successional stages in Alaska and Northwest Canada using UAV‐LiDAR and RGB and a community detection network

Remote Sensing in Ecology and Conservation, EarlyView.
This study develops a novel application of UAV‐LiDAR and Red Green Blue (RGB) data and network analysis to enhance our understanding of boreal forest succession. The results indicate that tree height and spectral variables are the most influential predictors of plant functional type in random forest algorithms, and high overall accuracies were attained.
Léa Enguehard, Birgit Heim, Ulrike Herzschuh, Viktor Dinkel, Glenn Juday, Santosh Panda, Nicola Falco, Jacob Schladebach, Jakob Broers, Stefan Kruse   +9 more
wiley   +1 more source