IEEE Access, 2023 BDS-3 was formally put into service on July 31, 2020, and now along with BDS-2 provides the positioning, navigation and timing services. In this contribution, different techniques of dual-frequency absolute positioning using the fully serviceable BDS-2 ...
Shengnan Liu, Shaolin Zhu, Jian Zhang
doaj +2 more sources
Testing theories of gravity with planetary ephemerides [PDF]
Living Reviews in Relativity, 2023 We describe here how planetary ephemerides are built in the framework of General Relativity and how they can be used to test alternative theories. We focus on the definition of the reference frame (space and time) in which the planetary ephemeris is ...
Agnès Fienga, Olivier Minazzoli
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Accurate and Rapid Broadcast Ephemerides for Beidou-Maneuvered Satellites
Remote Sensing, 2019 The geostationary earth orbit (GEO) and inclined geosynchronous orbit (IGSO) satellites of the Beidou navigation satellite system are maneuvered frequently. The broadcast ephemeris can be interrupted for several hours after the maneuver.
Jing Qiao +3 more
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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
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 ...
V. 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 ...
V. 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
The JPL Planetary and Lunar Ephemerides DE440 and DE441
, 2021 The planetary and lunar ephemerides called DE440 and DE441 have been generated by fitting numerically integrated orbits to ground-based and space-based observations. Compared to the previous general-purpose ephemerides DE430, seven years of new data have
R. Park +3 more
semanticscholar +1 more source
ExoClock Project. II. A Large-scale Integrated Study with 180 Updated Exoplanet Ephemerides [PDF]
Astrophysical Journal Supplement Series, 2021 The ExoClock project is an inclusive, integrated, and interactive platform that was developed to monitor the ephemerides of the Ariel targets to increase the mission efficiency.
A. Kokori +104 more
semanticscholar +1 more source
Decoupled and coupled moons’ ephemerides estimation strategies application to the JUICE mission [PDF]
Planetary and Space Science, 2022 When reconstructing natural satellites' ephemerides from space missions' tracking data, the dynamics of the spacecraft and natural bodies are often solved for separately, in a decoupled manner. Alternatively, the ephemeris generation and spacecraft orbit
M. Fayolle +4 more
semanticscholar +1 more source