Results 101 to 110 of about 17,319 (249)
The dynamical structure of the MEO region: long-term stability, chaos, and transport
, 2015 It has long been suspected that the Global Navigation Satellite Systems exist in a background of complex resonances and chaotic motion; yet, the precise dynamical character of these phenomena remains elusive. Recent studies have shown that the occurrence
Alessi, Elisa Maria +5 more
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Galileo quale infrastruttura europea per la navigazione orientata ai servizi
GEOmedia, 2014 Galileo is a joint initiative of the European Union and the European Space Agency, and is currently the most ambitious service-oriented and technologically advanced that has ever been developed in Europe.
Marco Lisi
doaj +2 more sources
The Joint ESA/NASA Galileo/GPS Receiver Onboard the ISS the GARISS Project [PDF]
ESA and NASA conducted a joint Galileo/GPS space receiver experiment on-board the International Space Station (ISS). The objectives (Enderle 2017) of the joint project were to demonstrate the robustness of a combined Galileo/GPS waveform uploaded to NASA
Chelmins, David +8 more
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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
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The Puzzle of the Flyby Anomaly
, 2009 Close planetary flybys are frequently employed as a technique to place spacecraft on extreme solar system trajectories that would otherwise require much larger booster vehicles or may not even be feasible when relying solely on chemical propulsion.
B. Tapley +19 more
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A Novel Ancient Coin-Like Fractal Multiband Antenna for Wireless Applications
International Journal of Antennas and Propagation, 2017 This study proposes a novel square-circle structure fractal multibroadband planar antenna, similar to an ancient Chinese coin-like structure, for second generation (2G), third generation (3G), fourth generation (4G), WLAN, and navigation wireless ...
Zhen Yu +3 more
doaj +1 more source
Deep-space navigation applications of improved ground-based optical astrometry [PDF]
Improvements in ground-based optical astrometry will eventually be required for navigation of interplanetary spacecraft when these spacecraft communicate at optical wavelengths.
Null, G. W. +2 more
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Benchmarking CPUs and GPUs on embedded platforms for software receiver usage [PDF]
, 2015 Smartphones containing multi-core central processing units (CPUs) and powerful many-core graphics processing units (GPUs) bring supercomputing technology into your pocket (or into our embedded devices).
Bär, W. +7 more
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Voyager mission support (2) [PDF]
The Deep Space Network report on tracking and data acquisition for Voyager Project is continued. The period of August through October 1980 is covered. The use of beacons for interplanetary navigation, specifically for target related navigation, was shown
Fanelli, N., Nance, H. E.
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Mass-Market Receiver for Static Positioning: Tests and Statistical Analyses [PDF]
, 2011 Nowadays, there are several low cost GPS receivers able to provide both pseudorange and carrier phase measurements in the L1band, that allow to have good realtime performances in outdoor condition.
Cina, Alberto, Marucco, G., Piras, Marco
core