Results 101 to 110 of about 162,591 (269)
Relativistic positioning: four-dimensional numerical approach in Minkowski space-time
, 2012 We simulate the satellite constellations of two Global Navigation Satellite Systems: Galileo (EU) and GPS (USA). Satellite motions are described in the Schwarzschild space-time produced by an idealized spherically symmetric non rotating Earth.
A. Cadez +25 more
core +1 more source
Freshly Generated Super Sunrise Plasma Bubbles During the Geomagnetic Storm on November 5–6, 2023
Space Weather, Volume 24, Issue 1, January 2026.Abstract During the geomagnetic storm on November 5–6, 2023, freshly generated super sunrise equatorial plasma bubbles (EPBs) and associated irregularities over the 80°–140°E sector were observed combining ground‐based and space observations from GNSS, ionosondes, HF Doppler records, and several satellite missions (COSMIC2, Swarm, and DMSP).
Ke Li +7 more
wiley +1 more source
WFH: A Wideband Frequency Hopping‐Based Anti‐Jamming Navigation Signal Structure
IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.Given the limitations of existing satellite navigation signals in antijamming performance amid growing environmental jamming, this paper proposes a navigation signal structure based on wideband frequency hopping (WFH) modulation to enhance both antijamming capability and measurement accuracy. It further introduces the nonstationary effective carrier‐to‐
Chenyang Wang +4 more
wiley +1 more source
JCMS: Journal of Common Market Studies, Volume 64, Issue 1, Page 371-386, January 2026.Abstract Russia's invasion of Ukraine in February 2022 disrupted the status quo of the European security order and brought about a re‐engagement in the UK–EU security relationship. However, co‐operation remains informal and ad hoc in ways that diverge from theoretical expectations of security co‐operation in the face of external threats.
Monika Sus, Benjamin Martill
wiley +1 more source
The flight performance of the Galileo orbiter USO [PDF]
Results are presented in this article from an analysis of radio metric data received by the DSN stations from the Galileo spacecraft using an Ultrastable Oscillator (USO) as a signal source.
Asmar, S. W. +2 more
core +1 more source
Journal of Applied Mathematics, Volume 2026, Issue 1, 2026.A body moving in a fluid experiences some of the fluid‐induced forces, which may derail the body from its fluid‐free trajectory and consequently transform its maximum height reached, time of flight, and range. These forces include upthrust, drag, and lift. Other than upthrust, an accurate description of drag and lift remains uncertain.
Eric Ouma Jobunga, Paolo Maria Mariano
wiley +1 more source
Polish Maritime Research, 2015 The article discusses damages of essential tribological associations in crankshaft and piston systems of large power two-stroke engines used as main engines, which take place during transport tasks performed by those ships.
Drypczewski K. +4 more
doaj +1 more source
La nuova rete GNSS multicostellazione dell’Umbria
GEOmedia, 2019 The GPSUMBRIA permanent station network (Umbria region, central Italy), renewed in all its components, is the first GNSS network in Italy and among the first in the world to provide positioning services on four constellations (GPS, GLONASS, GALILEO and ...
Fabio Radicioni, Aurelio Stoppini
doaj
Data analysis of GEONET network data applying Galileo Satellite System
, 2020 Seiichi Shimada
openalex +1 more source