Results 31 to 40 of about 52,769 (226)
Introducing Relativity in Global Navigation Satellite Systems [PDF]
Annalen Phys.16:258-273,1997, 2005 Today, the Global Navigation Satellite Systems, used as global positioning systems, are the GPS and the GLONASS. They are based on a Newtonian model and hence they are only operative when several relativistic effects are taken into account. The most important relativistic effects (to order 1/c^2) are: the Einstein gravitational blue shift effect of the
arxiv +1 more source
Instantaneous GPS-Galileo attitude determination: single-frequency performance [PDF]
, 2013 New and modernized global navigation satellite systems (GNSSs) are paving the way for an increasing number of applications in positioning, navigation, and timing (PNT).
Nadarajah, Nandakumaran +2 more
core +1 more source
System engineering approach applied to Galileo system [PDF]
, 2010 Developing a localization system, with more precise performances than GPS that guarantees Europe autonomy is a complex challenge that ESA and a large number of European economical actors of space industry were decided to meet.
Bouchired, Steven +1 more
core +1 more source
Remote Sensing, 2021 Satellite chip shape distortions lead to signal tracking errors in pseudorange measurements, which are related to the receiver manufacturers, called receiver-related pseudorange biases. Such biases will lead to adverse effects for differential code bias (
Lingyue Cheng +4 more
doaj +1 more source
Analysis of the Impact of Multipath on Galileo System Measurements
Remote Sensing, 2021 Multipath is one of the major source of errors in precise Global Navigation Satellite System positioning. With the emergence of new navigation systems, such as Galileo, upgraded signals are progressively being used and are expected to provide greater ...
Dominik Prochniewicz, Maciej Grzymala
doaj +1 more source
Instantaneous GPS/Galileo/QZSS/SBAS Attitude Determination: A Single-Frequency (L1/E1)Robustness Analysis under Constrained Environments [PDF]
, 2014 The augmentation of new global navigation satellite systems (GNSS) to existing GPS enhances the availability of satellite based positioning, navigation, and timing (PNT) solutions.
Nadarajah, Nandakumaran +1 more
core +1 more source
Assessing the Performance of Multi-GNSS PPP-RTK in the Local Area
Remote Sensing, 2020 The benefits of an increased number of global navigation satellite systems (GNSS) in space have been confirmed for the robustness and convergence time of standard precise point positioning (PPP) solutions, as well as improved accuracy when (most of) the ...
Hongyang Ma +4 more
doaj +1 more source
MULTI-GNSS RECEIVER FOR AEROSPACE NAVIGATION AND POSITIONING APPLICATIONS [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2014 The upcoming Galileo system opens a wide range of new opportunities in the Global Navigation Satellite System (GNSS) market. However, the characteristics of the future GNSS signals require the development of new GNSS receivers.
T. R. Peres +7 more
doaj +1 more source
Sensors, 2023 The global navigation satellite system (GNSS) signals are vulnerable to disruption sources, such as signal jamming. This, in turn, can cause severe degradation or discontinuities of the GNSS-based position, navigation, and timing services.
Abdelsatar Elmezayen +3 more
doaj +1 more source
Relativistic positioning: errors due to uncertainties in the satellite world lines [PDF]
Astrophys. Space Sci. (2014), 2014 Global navigation satellite systems use appropriate satellite constellations to get the coordinates of an user -close to Earth- in an almost inertial reference system. We have simulated both GPS and GALILEO constellations. Uncertainties in the satellite world lines lead to dominant positioning errors.
arxiv +1 more source