Results 71 to 80 of about 443 (169)

Federated Learning of Jamming Classifiers: From Global to Personalized Models

Navigation
Jamming signals can jeopardize and ultimately prevent the effective operation of global navigation satellite system (GNSS) receivers. Given the ubiquity of these signals, jamming mitigation and localization techniques are of crucial importance, and these
Peng Wu, Helena Calatrava, Tales Imbiriba, Pau Closas   +3 more
doaj   +1 more source

Optimal INS Monitor for GNSS Spoofer Tracking Error Detection

Navigation
In this article, we describe a new method for detecting global navigation satellite system (GNSS) spoofing using an inertial navigation system. We specifically address the most difficult-to-detect scenario, in which a spoofer replicates the authentic ...
Birendra Kujur, Samer Khanafseh, Boris Pervan   +2 more
doaj   +1 more source

Improving suitability of urban canals and canalized rivers for transportation, thermal energy extraction and recreation in two European delta cities. [PDF]

Ambio, 2023
van der Meulen ES, van de Ven FHM, van Oel PR, Rijnaarts HHM, Sutton NB.   +4 more
europepmc   +1 more source

An Analytical Derivation of the Signal-in-Space Root-Mean-Square User Range Error

Navigation
The concept of the signal-in-space (SIS) root-mean-square (RMS) user range error (URE) is used to evaluate the performance of multiple global navigation satellite systems (GNSSs); however, a complete analytical derivation has not been published.
Brent Renfro, Jason Drotar, Austin Finn, Miquela Stein, Emery Reed, Eduardo Villalba   +5 more
doaj   +1 more source

Biodiversity of aquatic organisms in the Mekong Delta, Vietnam. [PDF]

Biodivers Data J, 2023
Seleznev DG, Dinh CN, Hai TB, Karpova EP, Kim Chi DT, Kosolapov DB, Kosolapova NG, Malin MI, Malina IP, Man LQ, Prokin AA, Prusova IY, Sharov AN, Statkevich SV, Tsvetkov AI, Udodenko YG, Zakonnov VV, Zhdanova SM, Krylov AV, Tiunov AV.   +19 more
europepmc   +1 more source

Robust Determination of Smartphone Heading by Mitigation of Magnetic Anomalies

Navigation
We introduce an algorithm that provides robust three-dimensional orientation of a smartphone for pedestrian indoor localization. The algorithm focuses on integration of the magnetometer and a reformulated observation model such that the influence of ...
Andreas Ettlinger, Andreas Wieser, Hans Neuner   +2 more
doaj   +1 more source

Urban Blue Spaces as Therapeutic Landscapes: "A Slice of Nature in the City". [PDF]

Int J Environ Res Public Health, 2022
Smith N, Foley R, Georgiou M, Tieges Z, Chastin S.   +4 more
europepmc   +1 more source

Doppler Positioning Using Multi-Constellation LEO Satellite Broadband Signals as Signals of Opportunity

Navigation
This paper investigates the potential of signals of opportunity for positioning using broadband low Earth orbit constellations. We developed analytical absolute and differential models based on Doppler-shift observations from multi-constellation ...
Amir Allahvirdi-Zadeh, Ahmed El-Mowafy, Kan Wang   +2 more
doaj   +1 more source

Comprehensive Analysis of Acquisition Time for a Multi-Constellation and Multi-Frequency GNSS Receiver at GEO Altitude

Navigation
The utilization of global navigation satellite systems (GNSSs) in the space service volume, such as the geostationary Earth orbit (GEO) altitude, has recently attracted significant interest owing to their potential advantages in performance and cost ...
Young-Jin Song, Ki-Ho Kwon, Jong-Hoon Won   +2 more
doaj   +1 more source

Candidate Design of New Service Signals in the NavIC L1 Frequency Band

Navigation
Satellite navigation payloads use a constant-envelope composite signal to efficiently operate their high-power amplifiers in the saturation region. This composite signal consists of multiple signals that are multiplexed at the baseband level to support ...
Vijay Singh Bhadouria, Dhaval J. Upadhyay, Parimal J. Majithiya, Subhash Chandra Bera   +3 more
doaj   +1 more source