Signal in Space Error and Ephemeris Validity Time Evaluation of Milena and Doresa Galileo Satellites. [PDF]
Sensors (Basel), 2019 In August 2016, Milena (E14) and Doresa (E18) satellites started to broadcast ephemeris in navigation message for testing purposes. If these satellites could be used, an improvement in the position accuracy would be achieved.
Robustelli U, Benassai G, Pugliano G.
europepmc +5 more sources
Analysis of Post-Processed Pseudorange-Based Point Positioning with Different Data Sources for the Current Galileo Constellations. [PDF]
Sensors (Basel)The Galileo satellite navigation system now provides initial services. With further satellite launches, the performance of Galileo will gradually improve, and new services will be introduced. This study aims to provide a comprehensive analysis of Galileo
Zhang J, Li W.
europepmc +2 more sources
GPS Satellite Velocity and Acceleration Determination using the Broadcast Ephemeris [PDF]
Journal of Navigation, 2006 Satellite velocity determination using the broadcast ephemeris is discussed and it is pointed out that the conventional rotation matrix method involves a complicated process of computation. This paper proposes an alternative method using a simple differentiator to derive satellite Earth-Centred-Earth-Fixed (ECEF) velocity from the ECEF satellite ...
Ron Grenfell +3 more
openaire +4 more sources
Proposed Orbital Products for Positioning Using Mega-Constellation LEO Satellites. [PDF]
Sensors (Basel), 2020 With thousands of low Earth orbit (LEO) satellites to be launched in the near future, LEO mega-constellations are supposed to significantly change the positioning and navigation service for ground users.
Wang K, El-Mowafy A.
europepmc +2 more sources
Different approaches in GLONASS orbit computation from broadcast ephemeris [PDF]
Geodetski Vestnik, 2016 Several types of methods can solve equations of satellite motion numerically. These methods are divided into single and multi-step methods. The accuracy of each method depends directly on adopted integration step size between successive iterations.
Kamil Maciuk
doaj +2 more sources
Performance Assessment of Non-Integer-Hour Data Blocks in BDS Broadcast Ephemeris
IEEE AccessDue to system anomalies, BeiDou navigation satellite system (BDS) sometimes updates the broadcast ephemeris at non-integral hours. The gross errors contained in the non-integer-hour data blocks of broadcast ephemeris will lead to the signal-in-space (SIS)
Jingjing Wang, Chao Zhou
doaj +2 more sources
A Real-Time Detection Method for BDS Signal in Space Anomalies. [PDF]
Sensors (Basel), 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
Cheng C, Zhao Y, Li L, Zhao L.
europepmc +2 more sources
Orbit Prediction using Broadcast Ephemeris for GLONASS Satellite Visibility Analysis [PDF]
Journal of Astronomy and Space Sciences, 2009 Even though there are several Global Navigation Satellite Systems under development, only GPS and GLONASS are currently available for satellite positioning.
Hye-In Kim, Kwan-Dong Park
doaj +3 more sources
A 16-parameter GEO Broadcast Ephemeris [PDF]
Journal of Geodesy and Geoinformation Science, 2018 Currently, the broadcast ephemerides used in GEOs are same as those of the MEOs and IGSOs in the BeiDou navigation constellation. However, a trade-off strategy, i.e.
Zhongkai ZHANG,Lan DU,Li LIU,Feng HE,Yu LU,Peiyuan ZHOU
doaj +1 more source
Engineering Proceedings, 2023 This paper investigates the potential of performing orbit determination directly in the Earth-fixed frame based on Inter-Satellite Ranging (ISR) measurements as primary observables, combined with Ground-to-Satellite Ranging (GSR) measurements from a ...
Andrea Testa +4 more
doaj +2 more sources