Results 11 to 20 of about 162,805 (182)

Effect of using different satellite ephemerides on GPS PPP and post processing techniques

Geodesy and Cartography, 2021
The orbital error is one of the errors in GPS which affect the accuracy of GPS positioning. In this research GPS broadcast, ultra-rapid, rapid and precise satellite ephemerides are used for processing different baseline lengths among some CORS stations ...
Khaled Mahmoud Abdel Aziz, Loutfia Elsonbaty   +1 more
doaj   +2 more sources

Multi-GNSS Combined Orbit and Clock Solutions at iGMAS [PDF]

Sensors, 2022
Global navigation services from the quad-constellation of GPS, GLONASS, BDS, and Galileo are now available. The international GNSS monitoring and assessment system (iGMAS) aims to evaluate the navigation performance of the current quad systems under a ...
Wei Zhou, Hongliang Cai, Guo Chen, Wenhai Jiao, Qianqian He, Yuguo Yang   +5 more
doaj   +2 more sources

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
doaj   +2 more sources

Space State Representation Product Evaluation in Satellite Position and Receiver Position Domain [PDF]

Sensors, 2020
In Global Navigation Satellite Systems (GNSS) positioning, important terms in error budget are satellite orbits and satellite clocks correction errors. International services are developing and providing models and correction to minimize the influence of
Renata Pelc-Mieczkowska, Dariusz Tomaszewski   +1 more
doaj   +2 more sources

The Quality Assessment of Non-Integer-Hour Data in GPS Broadcast Ephemerides and Its Impact on the Accuracy of Real-Time Kinematic Positioning Over the South China Sea

Computer Modeling in Engineering & Sciences, 2019
The abnormal effect in the GPS broadcast ephemeris could cause significant influence on the real-time navigation and positioning solution by using orbit and clock error data provided by GPS broadcast ephemeris.
Zhangzhen Sun, Tianhe Xu, Fan Gao, Chunhua Jiang, Guochang Xu   +4 more
openalex   +2 more sources

COMPARISON OF GPS SATELLITE COORDINATES COMPUTED FROM BROADCAST AND IGS FINAL EPHEMERIDES

, 2017
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
Ekrem Tuşat, Fethi Ozyuksel
openalex   +3 more sources

Integrated precise orbit determination for LEO constellation and BDS-3 MEO satellites using inter-satellite links and onboard BDS-3 observations

Satellite Navigation
By leveraging the high-precision spatial reference established with Global Navigation Satellite System (GNSS), we propose a low-ground-dependency and low-latency Precise Orbit Determination (POD) method employing onboard GNSS, Inter-Satellite Link (ISL ...
Geer Qin, Kecai Jiang, Min Li, Qile Zhao, Xin Xie, Youcun Wang, Chao Yang, Yubin Wang, Chuntao Chang   +8 more
doaj   +2 more sources

GPS and Galileo Precise Point Positioning Performance with Tropospheric Estimation Using Different Products: BRDM, RTS, HAS, and MGEX

Remote Sensing
The performance of Precise Point Positioning (PPP) using different Global Navigation Satellite System (GNSS) product sets, including broadcast ephemerides, International GNSS Service Real-Time Service (IGS-RTS) corrections, Galileo High Accuracy Service (
Damian Kiliszek
doaj   +2 more sources

Mobile laser scanning elevation data accuracy in closed and partially open sky area

Geodesy and Cartography, 2021
Mobile laser scanning is being used more often in Estonia and abroad to obtain geospatial information. As the system is still new and being upgraded, different methods are being used to find out how accurately the mobile laser scanner can measure in ...
Gerly Annok, Valdar Tammin, Natalja Liba
doaj   +1 more source

Implementation of the variation of the luni-solar acceleration into GLONASS orbit calculus [PDF]

Geodetski Vestnik, 2021
In the differential equation system describes the motion of GLONASS satellites (rus. Globalnaya Navigazionnaya Sputnikovaya Sistema, or Global Navigation Satellite System ), the acceleration caused by the luni-solar traction is often taken as a constant ...
Sid Ahmed Medjahed, Abdelhalim Niati, Noureddine Kheloufi, Habib Taibi   +3 more
doaj   +1 more source