Results 101 to 110 of about 788,278 (206)

Precise Positioning with Broadcast Ephemerides [PDF]

, 2021
Montenbruck, Oliver, Carlin, Luca, Hauschild, André   +2 more
openaire   +1 more source

Altimeter measurements for the determination of the Earth's gravity field [PDF]

, 1986
Progress in the following areas is described: refining altimeter and altimeter crossover measurement models for precise orbit determination and for the solution of the earth's gravity field; performing experiments using altimeter data for the improvement
Shum, C. K., Tapley, B. D., Schutz, B. E.   +2 more
core  

Studying the Properties of Spacetime with an Improved Dynamical Model of the Inner Solar System

Universe
Physical properties of the Sun (orientation of rotation axis, oblateness coefficient J2⊙, and change rate of the gravitational parameter μ˙⊙) are determined using a dynamical model describing the motion of the Sun, planets, the Moon, asteroids, and Trans-
Dmitry Pavlov, Ivan Dolgakov
doaj   +1 more source

Observations of Five Major Uranian Satellites during 2013–2020 Based on Gaia DR3

The Astrophysical Journal Supplement Series
A total of 10,339 positions of the five major Uranian satellites (Ariel, Umbriel, Titania, Oberon and Miranda) were collected at the Yunnan Observatories from 2013 to 2020 with the 1.0 m astrometric reflector.
H. Y. Zhang, Y. Yu, R. C. Qiao, D. Yan, X. Cheng, K. Tang, Y. D. Mao   +6 more
doaj   +1 more source

New ephemerides and detection of transit-timing variations in the K2-138 system using high-precision CHEOPS photometry

Astronomy & Astrophysics
Context. Multi-planet systems are a perfect laboratory for constraining planetary formation models. A few of these systems present planets that come very close to mean motion resonance, potentially leading to significant transit-timing variations (TTVs) due to their gravitational interactions. Of these systems, K2-138 represents an excellent laboratory
H. G. Vivien, S. Hoyer, M. Deleuil, S. Sulis, A. Santerne, J. L. Christiansen, K. K. Hardegree-Ullman, T. A. Lopez   +7 more
openaire   +3 more sources

Subtabulated Lunar and Planetary Ephemerides [PDF]

, 1960
In a joint JPL-STL effort the planetary ephemerides have been collected on IBM 704-709 magnetic tape, and a series of routines have been written to utilize these tapes.
Hudson, R. H.
core  

The Fundamental Parameters and Evolutionary Status of V454 Aurigae

Physics and Astronomy Reports
Eclipsing binary systems have a unique feature that enables scientists to obtain precise fundamental star parameters, which opens up a greater area of astrophysics studies.
Gökhan Yücel, Remziye Canbay, Volkan Bakış   +2 more
doaj   +1 more source

TESS Photometry and Radial-velocity Analysis of the Sub-Neptune Exoplanet π Mensae c and the Wider π Mensae Planetary System

The Astronomical Journal
Exoplanet characterization relies on precise measurements of planetary orbital and physical parameters. This is particularly important for planetary dynamics and atmospheric evolution, as orbital parameters help constrain system evolution, resolve ...
Skylar S. Larsen, Jake D. Turner, Nikole K. Lewis, Maryame El Moutamid, Diana Solano-Oropeza, Lili Alderson, V. Abby Boehm, Daniel A. Yahalomi, Emily K. Deibert, Ray Jayawardhana, Dong Lai, Adam B. Langeveld, Kyle A. Pearson   +12 more
doaj   +1 more source

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

Sensors (Basel), 2023
Angrisano A, Ascione S, Cappello G, Gioia C, Gaglione S.   +4 more
europepmc   +1 more source

Ephemerides nacionaes

, 1881
Inclui índice alphabetico das "Ephemerides Nacionaes".Blake, Sacramento. Diccionario bibliographico brazileiro. Rio de Janeiro: Imprensa Nacional, 1883-1902. v. 4, p. 271-273.Colligidas pelo Dr. J. A. Teixeira de Mello e publicadas na Gazeta de NoticiasT.
Mello, José Alexandre Teixeira de, 1833-1907
core