Results 131 to 140 of about 186,788 (382)
Calibration of Magnetometers with GNSS Receivers and Magnetometer-Aided GNSS Ambiguity Fixing [PDF]
Sensors, 2017 Magnetometers provide compass information, and are widely used for navigation, orientation and alignment of objects. As magnetometers are affected by sensor biases and eventually by systematic distortions of the Earth magnetic field, a calibration is needed. In this paper, a method for calibration of magnetometers with three Global Navigation Satellite
openaire +6 more sources
Accelerating GNSS Software Receivers [PDF]
ION GNSS+, The International Technical Meeting of the Satellite Division of The Institute of Navigation, 2016 Grant numbers : Authors ere also support by the Government of Catalonia under Grant 2014–SGR–1567.
Fernández-Prades, Carles +2 more
openaire +2 more sources
Prioritized Real‐Time UAV‐Based Vessel Detection for Efficient Maritime Search
Journal of Field Robotics, EarlyView.ABSTRACT Real‐time vessel detection in maritime environments is crucial for diverse applications requiring speed and accuracy. Static camera views often introduce blind spots, compromising detection efficiency. This paper proposes a novel, real‐time UAV‐based system that uses a dynamic camera control strategy to address this limitation.
Lyes Saad Saoud +6 more
wiley +1 more source
, 2018 La conoscenza della Terra non può prescindere dall’impiego di un riferimento altimetrico connesso al campo di gravità, sia per le applicazioni scientifiche che tecniche. Tradizionalmente la quota associata a un generico punto è riferita al livello medio del mare e, in Italia, l'Ente competente per l'osservazione e il monitoraggio di tale livello è l ...
Sguerso, Domenico +5 more
openaire +2 more sources
Friction Shock Absorbers and Reverse Thrust for Fast Multirotor Landing on High‐Speed Vehicles
Journal of Field Robotics, EarlyView.ABSTRACT Typical landing gears of small uninhabited aerial vehicles (UAV) limit their capability to land on vehicles moving at more than 20–50 km/h due to high drag forces, high pitch angles and potentially high relative horizontal velocities. To enable landing at higher speeds, a combination of lightweight friction shock absorbers and reverse thrust ...
Isaac Tunney +2 more
wiley +1 more source
Tracking Mooring Lines of Floating Structures by an Autonomous Underwater Vehicle
Journal of Field Robotics, EarlyView.ABSTRACT This study presents a novel method for tracking mooring lines of Floating Offshore Wind Turbines (FOWTs) using an Autonomous Underwater Vehicle (AUV) equipped with a tilt‐controlled Multibeam Imaging Sonar (MBS). The proposed approach enables the AUV to estimate the 3D positions of mooring lines and safely track them in real‐time, overcoming ...
Sehwa Chun +5 more
wiley +1 more source
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 +2 more
wiley +1 more source
Characteristics of BeiDou-3 Experimental Satellite Clocks
Remote Sensing, 2018 The characteristics of the improved Atomic Frequency Standard (AFS) operated on the latest BeiDou-3 experimental satellites are analyzed from day-of-year (DOY) 254 to 281, of the year 2017, considering the following three aspects: stability, periodicity,
Yifei Lv +3 more
doaj +1 more source
First results of a GNSS-R experiment from a stratospheric balloon over boreal forests [PDF]
, 2015 The empirical results of a global navigation satellite systems reflectometry (GNSS-R) experiment onboard the Balloon EXperiments for University Students (BEXUS) 17 stratospheric balloon performed north of Sweden over boreal forests show that the power of
Camps Carmona, Adriano José +3 more
core +2 more sources
Thermal Regimes of Beaver‐Impacted Stream Reaches in the Tualatin River Basin, Oregon, United States
River Research and Applications, EarlyView.ABSTRACT As beavers are increasingly used in stream restoration, interest in their potential to mitigate stream degradation has grown. However, the impacts of beaver dams on stream temperature remain inconsistent across studies, often due to differences in spatial scale and methodology.
Miles Mayer, Heejun Chang
wiley +1 more source