ASSESSING EFFICIENCY OF GPS EPHEMERIDES IN DIFFERENT REGION USING PRECISE POINT POSITIONING [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2023 Precise Point Positioning (PPP) is a technique that process Global Positioning System (GPS) observation that can achieve sub-decimetre accuracy. Precise ephemerides that contain satellite clock and position plays a vital role in minimising orbital and ...
H. S. Lee +3 more
doaj +1 more source
Combining astrometry and JUICE-Europa Clipper radio science to improve the ephemerides of the Galilean moons [PDF]
Astronomy & Astrophysics, 2023 The upcoming JUICE and Europa Clipper missions to Jupiter's Galilean satellites will provide radio science tracking measurements of both spacecraft. Such data are expected to significantly help estimating the moons' ephemerides and related dynamical ...
M. Fayolle +5 more
semanticscholar +1 more source
Newly found Mayan records of astronomical phenomena in Dresden Codex [PDF]
Serbian Astronomical Journal, 2023 The rich culture of old Maya gave birth to a very complicated and complex calendar; they also recorded important historical events and many significant astronomical phenomena.
Vondrák J., Böhm V., Böhm B.
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Bayesian test of the mass of the graviton with planetary ephemerides [PDF]
Physical Review D, 2023 In this work, we investigated Bayesian methodologies for constraining in the Solar System a Yukawa suppression of the Newtonian potential -- which we interpret as the effect of a non-null graviton mass -- by considering its impact on planetary orbits ...
Vincenzo Mariani +4 more
semanticscholar +1 more source
Bayesian test of Brans–Dicke theories with planetary ephemerides: Investigating the strong equivalence principle [PDF]
Astronomy & Astrophysics, 2023 Aims. We are testing the Brans–Dicke class of scalar tensor theories with planetary ephemerides. Methods. In this work, we apply our recently proposed Bayesian methodology to the Brans–Dicke case, with an emphasis on the issue of the strong equivalence ...
Vincenzo Mariani +4 more
semanticscholar +1 more source
Precision Ephemerides for Gravitational-wave Searches – IV: Corrected and refined ephemeris for Scorpius X-1 [PDF]
Monthly notices of the Royal Astronomical Society, 2023 Low-mass X-ray binaries have long been theorised as potential sources of continuous gravitational-wave radiation, yet there is no observational evidence from recent LIGO/Virgo observing runs.
T. Killestein +4 more
semanticscholar +1 more source
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 +1 more
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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 +3 more
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AGG+, 2021 This paper analyses how broadcast and precise ephemerides in alignment, using the least-squares method, affect the accuracy of coordinates of the newly included permanent stations.
Tanja Đukanović +2 more
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Did old Maya observe Mercury? [PDF]
Serbian Astronomical Journal, 2022 It is well known that the rich culture of old Maya contained, among other, also a very complicated and complex calendar, in which they recorded not only historical events, but also significant astronomical phenomena.
Vondrák J., Böhm V., Böhm B.
doaj +1 more source