Results 31 to 40 of about 6,726 (227)

Determination of Orbital Elements and Ephemerides using the Geocentric Laplace’s Method

open access: yesJournal of Astronomy and Space Sciences, 2020
This paper presents a methodology for Initial Orbit Determination (IOD) based on a modification of the Laplace’s geocentric method. The orbital elements for Near-Earth asteroids (1864) Daedalus, 2003 GW, 2019 JA8, a Hungaria-type asteroid (4690 ...
Daniela Espitia   +2 more
doaj   +1 more source

UTC and GNSS system time access using PPP with broadcast ephemerides

open access: yesGPS Solutions, 2022
The application of precise point positioning with broadcast ephemerides (PPP-BCE) is discussed as an alternative to the established all-in-view technique for multi-GNSS time transfer.
L. Carlin   +3 more
semanticscholar   +1 more source

Contribution of PRIDE VLBI products to the joint JUICE-Europa Clipper moons’ ephemerides solution [PDF]

open access: yesIcarus (New York, N.Y. 1962)
In the coming decade, JUICE and Europa Clipper radio-science will yield the most accurate estimation to date of the Galilean moons' physical parameters and ephemerides.
M.S. Fayolle   +5 more
semanticscholar   +1 more source

ExoClock project: an open platform for monitoring the ephemerides of Ariel targets with contributions from the public [PDF]

open access: yesExperimental astronomy (Print), 2020
The Ariel mission will observe spectroscopically around 1000 exoplanets to further characterise their atmospheres. For the mission to be as efficient as possible, a good knowledge of the planets’ ephemerides is needed before its launch in 2028.
A. Kokori   +48 more
semanticscholar   +1 more source

Commission No. 4: Ephemerides (Ephemerides) [PDF]

open access: yesTransactions of the International Astronomical Union, 1988
It was the President’s sad duty to report the deaths of two former past Presidents of the Commission, W. Fricke who had also been a Vice-President of the IAU and a President of Commission 8, and D. H. Sadler who had been Superintendent of H.M. Nautical Almanac Office from 1936 to 1969 and was once General Secretary of the IAU.
openaire   +1 more source

La propriété intellectuelle des calculs astronomiques en question

open access: yesPhilosophia Scientiæ, 2018
In 1885, the Bureau des longitudes (i.e., the French Board of longitude) had to adapt the ephemerides of the Connaissance des temps in order to answer the needs of the sailors.
Guy Boistel
doaj   +1 more source

Under-Developed and Under-Utilized Eclipsing Binary Model Capabilities [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2012
Existing but largely unused binary star model capabilities are examined. An easily implemented scheme is parameterization of starspot growth and decay that can stimulate work on outer convection zones and their dynamos.
R. E. Wilson
doaj   +1 more source

PROGRAMS OF AES EPHEMERIDES CALCULATION

open access: yesOdessa Astronomical Publications, 2017
A program of AES ephemerides calculation is developed which permits, from the given set of elemental orbit, to calculate ephemerides for several months’ period.
S. Ja. Kolesnik, N. G. Paltsev
doaj   +1 more source

Observational Data and Orbits of the Asteroids Discovered at the Baldone Observatory in 2008–2013

open access: yesOpen Astronomy, 2015
The paper presents statistics of the asteroids observed and discovered at the Baldone Observatory, Latvia, in 2008–2013 within the project for astrometric observations of the near-Earth objects (NEOs), the main belt asteroids and comets. CCD observations
Černis K., Wlodarczyk I., Eglitis I.
doaj   +1 more source

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

open access: yesGeodesy 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

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