Results 91 to 100 of about 3,469 (207)
A Real-Time Detection Method for BDS Signal in Space Anomalies
Sensors, 2019 Signal In Space (SIS) anomalies in satellite navigation systems can degrade satellite-based navigation and positioning performance. The occurrence of SIS anomalies from the BeiDou navigation satellite System (BDS) may be more frequent than for the Global
Chun Cheng +3 more
doaj +1 more source
Investigation on Reference Frames and Time Systems in Multi-GNSS
Remote Sensing, 2018 Receivers able to track satellites belonging to different GNSSs (Global Navigation Satellite Systems) are available on the market. To compute coordinates and velocities it is necessary to identify all the elements that contribute to interoperability of ...
Luca Nicolini, Alessandro Caporali
doaj +1 more source
VEGA Pathfinder navigation for Giotto Halley encounter [PDF]
Results of the VEGA Pathfinder concept which was used to successfully target the European Space Agnecy's Giotto spacecraft to a 600 km encounter with the comet Halley are presented.
Ellis, J., Mcelrath, T. P.
core +1 more source
EGNOS based virtual reference stations [PDF]
, 2008 We propose the use of the European Geostationary Navigation Overlay Service (EGNOS) data - real time on line data provided by SISNeT - to develop Virtual Reference Stations and, thus, increase the quality of the Position, Velocity an Time (PVT) solution ...
Malheiro, Benedita +1 more
core
A multi-satellite orbit determination problem in a parallel processing environment [PDF]
The Engineering Orbit Analysis Unit at GE Valley Forge used an Intel Hypercube Parallel Processor to investigate the performance and gain experience of parallel processors with a multi-satellite orbit determination problem.
Anderle, R. J., Deakyne, M. S.
core +1 more source
Simulation and analysis of differential global positioning system for civil helicopter operations [PDF]
A Differential Global Positioning System (DGPS) computer simulation was developed, to provide a versatile tool for assessing DGPS referenced civil helicopter navigation.
Cabak, A. R., Denaro, R. P.
core +1 more source
Sensors, 2017 The failure to detect anomalies and maneuvering of the orbits of navigation satellite sensors will deteriorate the performance of positioning and orbit determination.
Fei Ye +3 more
doaj +1 more source
A Method to Determine BeiDou GEO/IGSO Orbital Maneuver Time Periods
Sensors, 2019 Because there are different types of BeiDou constellations with participating geostationary orbit (GEO) and inclined geosynchronous orbit (IGSO) satellites, the maneuvering frequency of BeiDou satellites is higher than that of other navigation systems ...
Zhiwei Qin +7 more
doaj +1 more source
Backpack VLBI terminal with subscentimeter capability [PDF]
Backpack portable equipment was developed to measure vector baseline from approximately 1 km to 100 km in length with subcentimeter to few centimeter accuracy. The equipment design features as well as the instrumentation specifications are discussed.
Connselman, C. C., III +3 more
core +1 more source
Autonomous satellite orbit determination during the development phases of the global positioning system [PDF]
An onboard navigation system was developed to aid the design and evaluation of algorithms used in autonomous satellite navigation with Global Positioning System (GPS) data. The performance of the algorithms designed for a GPS Receiver/Processor Assembly (
Dunham, J. B.
core +1 more source