Results 21 to 30 of about 192 (150)

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, Menghao Li, Yanxiong Liu, Yanfeng Wang, Shumin Jiang, Yabin Wang, Li Tian, Fangli Qiao   +7 more
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Sub-Decimeter Onboard Orbit Determination of LEO Satellites Using SSR Corrections: A Galileo-Based Case Study for the Sentinel-6A Satellite

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, Stefano Casotto, Massimo Bardella, Mauro Sciarratta, Paolo Zoccarato   +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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Study on systematic errors of BDS-3 broadcast ephemeris and their effects with Helmert transformation

Satellite Navigation, 2023
Previous studies have not evaluated the systematic errors implied in the third generation of BeiDou-3 Navigation Satellite System (BDS-3) broadcast ephemeris.
Min Li, Jiangnan Zhang, Guo Chen, Liang Chen, Qile Zhao   +4 more
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Performance Analysis of BDS-3 SAIM and Enhancement Research on Autonomous Satellite Ephemeris Monitoring

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, Yongshan Dai, Weiguang Gao, Yueling Cao, Zhigang Hu, Qianyi Ren, Xin Nie, Jiaju Zheng, Ruiqiang Shao, Ling Pei, Lu Wang   +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, Zhiyuan Li, Yawei Wang, Chenlong Deng, Yangyang Li, Weiming Tang, Ruinan Fu, Jianhui Cui, Jingnan Liu   +8 more
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Izračun položaja GPS-satelita iz podatkov oddanih efemerid : GPS-Orbit Computation from Broadcast Ephemeris Data [PDF]

Geodetski Vestnik, 2004
The article describes the theoretical point of view of the GPS-broadcast ephemerides application. Beside the raw GPS observations, any kind of GPS ephemerides represents indispensable data in the GPS processing engine.
Bojan Stopar, Polona Pavlovčič Prešeren   +1 more
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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
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