Results 11 to 20 of about 1,544 (147)
A relativistic navigation system for space [PDF]
, 2011 We present here a method for the relativistic positioning in spacetime based on the reception of pulses from sources of electromagnetic signals whose worldline is known.
Capolongo, Emiliano +2 more
core +4 more sources
COMPARISON OF GPS SATELLITE COORDINATES COMPUTED FROM BROADCAST AND IGS FINAL EPHEMERIDES
International Journal of Engineering and Geosciences, 2018 There are mainly two different orbital information, namely broadcast ephemerides and IGS final ephemerides (IGS rapid, ultra rapid, predicted and final ephemerides) used in the GPS positioning. The broadcast ephemerides used in practice and real time are obtained through assessments derived from the observations from the USA GPS reference stations ...
TUSAT, Ekrem, OZYUKSEL, Fethi
openaire +3 more sources
Signal-in-Space Range Error Analysis of the Simulated Broadcast Ephemerides for the Kepler System. [PDF]
, 2022 Kepler navigation system is a DLR’s proposal for the next generation of GNSS. It comprises a constellation of Galileo-like satellites augmented by Low Earth Orbit (LEO) satellites and exploits optical inter-satellite links (OISLs) for constellation-wide clock synchronization, communication and precise ranging.
Michalak, Grzegorz +5 more
openaire +1 more source
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT Low Earth Orbit (LEO) satellite constellations offer unprecedented opportunities for global broadband connectivity but pose significant beamforming challenges due to rapid platform motion and stringent onboard hardware constraints. Fully digital architectures, while optimal in theory, remain impractical for satellite payloads, motivating ...
Mohammad Momani +2 more
wiley +1 more source
Phoenix-XNS - A Miniature Real-Time Navigation System for LEO Satellites [PDF]
, 2006 The paper describes the development of a miniature GPS receiver with integrated real-time navigation system for orbit determination of satellites in low Earth orbit (LEO).
Gill, Eberhard, Montenbruck, Oliver
core
High‐Latitude GPS Position Error During Substorms
Space Weather, Volume 24, Issue 6, June 2026.Abstract Substorms produce rapid fluctuations in Global Navigation Satellite System (GNSS) signals, leading to degraded positioning performance at high latitudes. This study investigates the correlation of auroral structures on Global Positioning System (GPS) Precise Point Positioning (PPP) error during three substorm events with different strengths ...
Weixuan Liao +6 more
wiley +1 more source
A Galileo IOV Assessment: Measurement and Position Domain [PDF]
, 2014 The European GNSS, Galileo, is currently in its In-Orbit Validation (IOV) phase where four satellites are finally available for computing the user position.
ANGRISANO Antonio +4 more
core +1 more source
Water Resources Research, Volume 62, Issue 5, May 2026.Abstract Information on river velocities enhances understanding flood hazards, evaluating habitat conditions, and predicting the transport of floating materials. In this follow‐up study, we used data from two new sites, one with a more complex morphology and the other with a lower suspended sediment concentration, to provide further evidence that ...
Carl J. Legleiter +3 more
wiley +1 more source
Method and apparatus for autonomous, in-receiver prediction of GNSS ephemerides [PDF]
, 2012 Methods and apparatus for autonomous in-receiver prediction of orbit and clock states of Global Navigation Satellite Systems (GNSS) are described. Only the GNSS broadcast message is used, without need for periodic externally-communicated information ...
Bar-Sever, Yoaz E., Bertiger, William I.
core +1 more source
The Impact of the 2024 Mother's Day Storm on Aircraft Surveillance Across Europe
Space Weather, Volume 23, Issue 12, December 2025.Abstract The Mother's day storm from 10–13 May 2024 is one of the most extreme space weather events recorded in recent decades and triggered a strong ionospheric response with various impacts on communication and navigation systems. In this study the impact on the aviation sector, and more specifically air traffic management, is investigated with ...
Erik Schmölter, Jens Berdermann
wiley +1 more source