Results 21 to 30 of about 162,805 (182)
Orbital Elements Ephemerides and Interfaces Design of LEO Satellites [PDF]
Journal of Geodesy and Geoinformation Science, 2019 Low earth orbit satellites, with unique advantages, are prosperous types of navigation augmentation satellites for the GNSS satellites constellations. The broadcast ephemeris element needs to be designed as an important index of the augmented LEOs.
Shanchuan FANG,Lan DU,Yunpeng GAO,Peiyuan ZHOU,Zejun LIU
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Remote Sensing, 2021 Positioning accuracy is affected by the combined effect of user range errors and the geometric distribution of satellites. Dilution of precision (DOP) is defined as the geometric strength of visible satellites.
Haomeng Cui, Shoujian Zhang
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PRELIMINARY ANALYSES OF BEIDOU SIGNAL-IN-SPACE ANOMALY SINCE 2013 [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016 As BeiDou navigation system has been operational since December 2012. There is an increasing desire to use multiple constellation to improve positioning performance. The signal-in-space (SIS) anomaly caused by the ground control and the space vehicle is
Y. Wu, J. Ren, W. Liu, W. Liu
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Real-time precise measurements of ocean surface waves using GNSS variometric approach
International Journal of Applied Earth Observations and Geoinformation, 2022 The global navigation satellite system (GNSS) wave buoys currently in use can measure ocean surface waves but have major drawbacks regarding their real-time high-precision application due to the communication burden and high differential correction ...
Yang Liu +7 more
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Remote Sensing, 2022 In GNSS-based navigation onboard Low Earth Orbit (LEO) satellites, typical accuracy requirements are 10 cm and 0.1 mm/s for 3D position and velocity, respectively.
Francesco Darugna +4 more
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A Flexible Ephemeris Representation for GNSS and Alternative PNT Signal Sources Using B-Splines
Navigation, 2023 Most global navigation satellite systems (GNSSs) ephemeris representations require straightforward, albeit specialized algorithms to compute the transmitter position at a time of interest.
Mikaela Dobbin, Penina Axelrad
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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
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Remote Sensing, 2022 Integrity is one of the key indicators used to characterize the performance of the global navigation satellite systems (GNSSs) and is closely related to user safety.
Lei Chen +10 more
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Galileo Single Point Positioning Assessment Including FOC Satellites in Eccentric Orbits
Remote Sensing, 2019 On August 2016, the Milena (E14) and Doresa (E18) satellites started to broadcast ephemeris in navigation message for testing purposes. As the Galileo constellation is not yet complete. It is very important to have two more satellites available since the
Umberto Robustelli, Giovanni Pugliano
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Multipath Error Fusion Modeling Methods for Multi-GNSS
Remote Sensing, 2021 The multipath error is considered to be the most limiting factor for high precision positioning applications. The sidereal filtering (SF) method can be used to mitigate the multipath error in the observation domain, and it has been successfully applied ...
Xuan Zou +8 more
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