Results 71 to 80 of about 4,190 (216)
INPOP21a planetary ephemerides
, 2021 The major points of improvement of INPOP21a relative to INPOP19a are i) the addition of 2 years of Mars Express data and 1 year of Juno normal points, ii) the use of new Uranus ground-based optical observations reduced with the Gaia DR3, iii) the modification of the dynamical modeling for the Kuiper belt object perturbations, and iv) the first ...
Fienga, A. +7 more
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Galileo Single Point Positioning Assessment Including FOC Satellites in Eccentric Orbits
Remote Sensing, 2019 On August 2016, the Milena (E14) and Doresa (E18) satellites started to broadcast ephemeris in navigation message for testing purposes. As the Galileo constellation is not yet complete. It is very important to have two more satellites available since the
Umberto Robustelli, Giovanni Pugliano
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Ephemerides and Celestial Mechanics [PDF]
Highlights of Astronomy, 1986 When solving some abstract problems in mechanics related to the dynamics of bodies and systems, the notion of an inertial frame of reference is introduced in an apparently clear and natural way by simply drawing its coordinate axes and then paying no further attention to the system of reference which is then taken for granted.
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Global Dynamics and Ephemerides
, 2012 When speaking of Gaia it is instructive to remember the first ESA mission dedicated to high precision astronometry HIPARRCOS launched in August 1989. HIPPARCOS can be considered as Gaia's precursor, indeed the observing strategy aspects are similar and both missions were designed specifically for high precision astronmetry. After three and a half years
Hestroffer, Daniel, David, Pedro
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Celestial ephemerides in an expanding universe [PDF]
Physical Review D, 2012 Post-Newtonian theory was instrumental in conducting the critical experimental tests of general relativity and in building the astronomical ephemerides of celestial bodies in the solar system with an unparalleled precision. The cornerstone of the theory is the postulate that the solar system is gravitationally isolated from the rest of the universe and
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Odessa Astronomical Publications, 2016 Formulae for determination of planetocentric positions of the basic photometrical circles on the surface of the spherical planet (the equator of intensity, an orthographic limb and orthographic terminator) from the elements of these circles specified to ...
V. V. Mikhalchuk
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The Astrophysical Journal Supplement SeriesMany hot Jupiters may experience orbital decays, which are manifested as long-term transit-timing variations. We have analyzed 7068 transits from the Transiting Exoplanet Survey Satellite (TESS) for a sample of 326 hot Jupiters.
Wenqin Wang +5 more
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4 Ephemerides (Ephemerides) [PDF]
Transactions of the International Astronomical Union, 1991 This report covers the period from 1 July 1987 to 30 June 1990. The ephemerides that have been published during this period have made use of the system of astronomical constants adopted at the 16th General Assembly of the IAU in Grenoble. At the same time that the use of the FK5 system on the J2000 epoch is increasing and catalogues are becoming ...
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Remote SensingThe 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
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