Results 21 to 30 of about 220,608 (333)
Global navigation satellite system [PDF]
, 2013 The last few years have shown an increased interest in the commercialization of the global navigation satellite system (GNSS), which is often referred to as the global positioning system (GPS) in various applications. A GPS system uses spread spectrum signals-binary phase-shift keying (BPSK)-emitted from satellites in space for position and time ...
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A Non-Linear Filtering Algorithm Based on Alpha-Divergence Minimization
Sensors, 2018 A non-linear filtering algorithm based on the alpha-divergence is proposed, which uses the exponential family distribution to approximate the actual state distribution and the alpha-divergence to measure the approximation degree between the two ...
Yarong Luo +3 more
doaj +1 more source
Electron density retrieval from truncated Radio Occultation GNSS data [PDF]
, 2019 This paper summarizes the definition and validation of two complementary new strategies, to invert incomplete Global Navigation Satellite System Radio-Occultation (RO) ionospheric measurements, such as the ones to be provided by the future EUMETSAT Polar
Cardellach Galí, Estel +3 more
core +2 more sources
International Journal of Distributed Sensor Networks, 2021 Global navigation satellite system is indispensable to provide positioning, navigation, and timing information for pedestrians and vehicles in location-based services.
Fan Qin +3 more
doaj +1 more source
Spoofing and Anti-Spoofing Technologies of Global Navigation Satellite System: A Survey
IEEE Access, 2020 A large number of facts prove that Global Navigation Satellite System (GNSS) has certain security risks and is threatened by attacks. In particular, GNSS civilian signal receivers have some vulnerability in responding to spoofing attack and jamming ...
Zhi-jun Wu +4 more
semanticscholar +1 more source
, 2021 Cut-to-length harvesters collect detailed information on the dimensions and characteristics of individual harvested trees. When equipped with global navigation satellite system (GNSS) receivers and motion sensors, the obtained measurements can be linked ...
Lennart Noordermeer +4 more
semanticscholar +1 more source
Predicting Long-Term Stability of Precise Oscillators under Influence of Frequency Drift
Sensors, 2018 High-performance oscillators, atomic clocks for instance, are important in modern industries, finance and scientific research. In this paper, the authors study the estimation and prediction of long-term stability based on convex optimization techniques ...
Weiwei Cheng, Guigen Nie
doaj +1 more source
Satellite Navigation, 2021 The autonomous navigation of the spacecrafts in High Elliptic Orbit (HEO), Geostationary Earth Orbit (GEO) and Geostationary Transfer Orbit (GTO) based on Global Navigation Satellite System (GNSS) are considered feasible in many studies.
Tao Shi, Xuebin Zhuang, Liwei Xie
doaj +1 more source
Accurate and automatic NOAA-AVHRR image navigation using a global contour matching approach [PDF]
, 2000 The problem of precise and automatic AVHRR image navigation is tractable in theory, but has proved to be somewhat difficult in practice. The authors' work has been motivated by the need for a fully automatic and operational navigation system capable of ...
Eugenio, F +4 more
core +1 more source
A Police and Insurance Joint Management System Based on High Precision BDS/GPS Positioning
Sensors, 2018 Car ownership in China reached 194 million vehicles at the end of 2016. The traffic congestion index (TCI) exceeds 2.0 during rush hour in some cities. Inefficient processing for minor traffic accidents is considered to be one of the leading causes for ...
Wenwei Zuo +4 more
doaj +1 more source