Results 91 to 100 of about 3,477,051 (221)

Tight Fusion of a Monocular Camera, MEMS-IMU, and Single-Frequency Multi-GNSS RTK for Precise Navigation in GNSS-Challenged Environments

Remote Sensing, 2019
Precise position, velocity, and attitude is essential for self-driving cars and unmanned aerial vehicles (UAVs). The integration of global navigation satellite system (GNSS) real-time kinematics (RTK) and inertial measurement units (IMUs) is able to ...
Tuan Li, Hongping Zhang, Zhouzheng Gao, Xiaoji Niu, Naser El-sheimy   +4 more
doaj   +1 more source

Multi-GNSS precise point positioning with next-generation smartphone measurements

, 2019
This study evaluates the feasibility of achieving improved positioning accuracy with raw GNSS measurements from recently released smartphones. Using Precise Point Positioning (PPP) as the processing mode, positioning accuracy of selected newly available ...
Sunil Bisnath (7459772), Ganga Shinghal (7459778), Nacer Naciri (7459775), Sihan Yang (2839370), John Aggrey (7459769)   +4 more
core   +1 more source

Seeing both the forest and the trees: An automated workflow for ultra‐high‐resolution drone imaging of tropical canopies

Methods in Ecology and Evolution, EarlyView.
Abstract Tropical forest canopies host diverse tree and liana assemblages, yet key foliar and reproductive traits needed for taxonomic identification of canopy plants are often difficult to see from the forest floor, creating a bottleneck in inventories.
Etienne Laliberté, Antoine Caron‐Guay, Vincent Le Falher, Guillaume Tougas, Helene C. Muller‐Landau, Gonzalo Rivas‐Torres, Thomas R. Walla, Hugo Baudchon, Mélvin Hernandez, Adrian Buenaño, Anna Weber, Jeffrey Q. Chambers, Jomber Chota Inuma, Fernando Araúz, Jorge Valdes, Andrés Hernández, David Brassfield, Paulo Araujo Filho, Vicente Vasquez, Adriana Simonetti, Daniel Magnabosco Marra, Caroline de Moura Vasconcelos, Jarol Fernando Vaca, Geovanny Rivadeneyra, José Illanes, Luis A. Salagaje‐Muela, Jefferson Gualinga   +26 more
wiley   +1 more source

Blind Adaptive Beamformer Based on Orthogonal Projections for GNSS [PDF]

, 2012
The quality of the ranging data provided by a global navigation satellite systems (GNSS) receiver largely depends on the synchronization error, that is, on the accuracy of the propagation time-delay estimation of the line-of-sight (LOS) signal.
Noll, Tobias G., Meurer, Michael, Antreich, Felix, Sgammini, Matteo, Kurz, Lothar   +4 more
core  

Geochemical and granulometric fingerprints of 8200 years of westerly wind variability in inner‐fjord lake sediments from Svalbard

Boreas, EarlyView.
The Arctic is warming faster than any other region on Earth. As sea ice diminishes, the surface boundary conditions, such as roughness and air–sea coupling, change and open‐water fetch increases. This may enhance wind forcing on Arctic coasts. Lake sediments can record these changes through the deposition of wind‐blown grains and elements, offering ...
Zofia Stachowska, Willem G. M. van der Bilt, Jan Kavan, Mark F. A. Furze, Ingunn H. Thorseth, Mateusz C. Strzelecki   +5 more
wiley   +1 more source

Precise point positioning with single and dual-frequency multi-GNSS android smartphones [PDF]

, 2020
The new generation of Android smartphones is equipped with high performance Global Navigation Satellite System (GNSS) chips capable of tracking dual frequency multi-constellation data.
Robustelli U., Marconi L., Pugliano G., Baiocchi V., Radicioni F.   +4 more
core   +1 more source

Multi-GNSS Combined Orbit and Clock Solutions at iGMAS. [PDF]

Sensors (Basel), 2022
Zhou W, Cai H, Chen G, Jiao W, He Q, Yang Y.   +5 more
europepmc   +1 more source

Multitrophic responses to tidal marsh restoration: early effects of channel configuration on water quality, aquatic food web structure, and fish communities

Restoration Ecology, EarlyView.
Abstract Introduction Tidal wetland restoration is critical for reversing habitat loss and enhancing resilience under sea‐level rise and climate variability. Dutch Slough in the San Francisco Estuary served as a living laboratory for adaptive management.
Joseph E. Merz, Cheryl Dean, Bobbie Flores, Katie Karpenko, Kai Ross, Andrew Veary   +5 more
wiley   +1 more source

Multi‐year occupancy and habitat use in a threatened butterfly reintroduced onto a restored peatland

Restoration Ecology, EarlyView.
Abstract Introduction Over half of insect species reintroductions are unsuccessful, frequently because of insufficient habitat resources and a knowledge‐gap regarding the target species habitat requirements. Multi‐season occupancy models, seldom used with invertebrates, offer the opportunity to disentangle the effects of habitat suitability and ...
Andrew W. Osborne, Stuart Marsden, Sarah M. Griffiths, Simon J. M. Caporn, Emma Coulthard   +4 more
wiley   +1 more source

Empirical Stochastic Model of Multi-GNSS Measurements. [PDF]

Sensors (Basel), 2021
Prochniewicz D, Wezka K, Kozuchowska J.
europepmc   +1 more source