Results 141 to 150 of about 186,788 (382)
TriG - A GNSS Precise Orbit and Radio Occultation Space Receiver [PDF]
, 2009 The GPS radio occultation (RO) technique [1] produces measurements in the ionosphere and neutral atmosphere [2] that contribute to monitoring space weather and climate change; and improving operational weather prediction.
Esterhuizen, Stephan +6 more
core
, 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 +6 more
core +1 more source
GNSS Jammer Localization and Identification With Airborne Commercial GNSS Receivers
IEEE Transactions on Information Forensics and SecurityGlobal Navigation Satellite Systems (GNSS) are fundamental in ubiquitously providing position and time to a wide gamut of systems. Jamming remains a realistic threat in many deployment settings, civilian and tactical. Specifically, in Unmanned Aerial Vehicles (UAVs) sustained denial raises safety critical concerns.
Marco Spanghero +3 more
openaire +3 more sources
River Research and Applications, EarlyView.ABSTRACT This study employs two measures of connectivity, valley confinement index (VCI) and effective catchment area (ECA), combined with a field survey of active sediment sources (ASS) to unravel the tributary‐trunk sedimentary links in the 42.5 km long inter‐dam reach of the Dyje River, Czech‐Austrian border.
Zdeněk Máčka +5 more
wiley +1 more source
Hyperspectral imaging has a limited ability to remotely sense the onset of beech bark disease
Remote Sensing in Ecology and Conservation, EarlyView.Although hyperspectral imaging is a powerful remote sensing tool, it proved ineffective in predicting the progression of beech bark disease, except in its later stages, both at the canopy and leaf levels. While some alterations in chlorophyll, water content, and canopy structure may have influenced foliar reflectance at the canopy scale, as suggested ...
Guillaume Tougas +3 more
wiley +1 more source
Improved Short-Term Clock Prediction Method for Real-Time Positioning
Sensors, 2017 The application of real-time precise point positioning (PPP) requires real-time precise orbit and clock products that should be predicted within a short time to compensate for the communication delay or data gap. Unlike orbit correction, clock correction
Yifei Lv +5 more
doaj +1 more source
Galileo and EGNOS as an asset for UTM safety and security [PDF]
, 2019 GAUSS (Galileo-EGNOS as an Asset for UTM Safety and Security) is a H2020 project1 that aims at designing and developing high performance positioning systems for drones within the U-Space framework focusing on UAS (Unmanned Aircraft System) VLL (Very Low ...
Andrade-Cetto, Juan +7 more
core
Remote Sensing in Ecology and Conservation, EarlyView.UAVs provide high spatial resolution imagery to detect and assess the spatial complexity of peatland vegetation. We used interannual multispectral data from aapa and palsa mires in Finland to classify plant communities using Random Forest. Based on class membership probabilities, we generated maps showing the second most likely classes and an ...
Franziska Wolff +9 more
wiley +1 more source
2D LiDAR SLAM Back-End Optimization with Control Network Constraint for Mobile Mapping
Sensors, 2018 Simultaneous localization and mapping (SLAM) has been investigated in the field of robotics for two decades, as it is considered to be an effective method for solving the positioning and mapping problem in a single framework.
Jingren Wen +5 more
doaj +1 more source
Sea state monitoring using coastal GNSS-R
, 2004 We report on a coastal experiment to study GPS L1 reflections. The campaign was carried out at the Barcelona Port breaker and dedicated to the development of sea-state retrieval algorithms.
Elfouhaily +9 more
core +2 more sources