Results 71 to 80 of about 700 (166)

Research on the Autonomous Orbit Determination of Beidou-3 Assisted by Satellite Laser Ranging Technology

open access: yesRemote Sensing
The Beidou Global System (BDS-3) innovatively achieves autonomous navigation using inter-satellite links (ISL) across the entire constellation, but it still faces challenges such as the limitations of the prior constraint orbital accuracy and the overall
Wei Xiao   +5 more
doaj   +1 more source

Testing theories of gravity with planetary ephemerides

open access: yesLiving Reviews in Relativity
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
doaj   +1 more source

Application of "Galileo High Accuracy Service" on Single-Point Positioning. [PDF]

open access: yesSensors (Basel), 2023
Angrisano A   +4 more
europepmc   +1 more source

ExoClock Project. IV. A Homogeneous Catalog of 620 Updated Exoplanet Ephemerides

open access: yesThe Astrophysical Journal Supplement Series
The ExoClock project is an open platform aiming to monitor exoplanets by integrating observations from space- and ground-based telescopes. This study presents an updated catalog of 620 exoplanet ephemerides, integrating 30,000 measurements from ground ...
A. Kokori   +325 more
doaj   +1 more source

Software Development of High-Precision Ephemerides of Solar System [PDF]

open access: yesJournal of Astronomy and Space Sciences, 1995
We solved n-body problem about 9 plants, moon, and 4 minor planets with relativistic effect related to the basic equation of motion of the solar system. Perturbations including figure potential of the earth and the moon and solid earth tidal effect were ...
Jong-Seob Shin   +4 more
doaj  

A Low Earth Orbit Satellite-Orbit Extrapolation Method Based on Multi-Satellite Ephemeris Coordination and Multi-Stream Fractional Autoregressive Integrated Moving Average

open access: yesAerospace
The low Earth orbit (LEO) satellite internet network (LEO-SIN) has become a heated issue for the next generation of mobile communications, serving as a crucial means to achieve global wide-area broadband coverage and, especially, mobile phone directly to
Wenliang Lin   +10 more
doaj   +1 more source

Commission 4: Ephemerides (Ephemerides) [PDF]

open access: yesTransactions of the International Astronomical Union, 2007
openaire   +1 more source

Determinations of Asteroid Masses Using Mutual Encounters Observed in the Legacy Survey of Space and Time

open access: yesThe Planetary Science Journal
Using published simulations of the 10 yr Legacy Survey of Space and Time (LSST), we forecast its ability to determine the masses of individual main-belt asteroids (MBAs) through precise astrometry of any pairs of the ≈1.2 million known MBAs undergoing ...
Gary M. Bernstein   +2 more
doaj   +1 more source

Revised Ephemerides of the Martian Satellites, Phobos and Deimos

open access: yesThe Astronomical Journal
We report on the new ephemerides (MAR099) for the satellites of Mars derived from a large set of ground-based and spacecraft astrometric measurements. Our integrated orbit fit yielded latest estimates for the Martian tidal parameter τ = k _2 / Q = 1.816 ±
Marina Brozović   +2 more
doaj   +1 more source

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