Results 81 to 90 of about 13,063 (249)
The K2 and TESS Synergy. III. Search and Rescue of the Lost Ephemeris for K2's First Planet
The Astronomical JournalK2-2 b/HIP 116454 b, the first exoplanet discovery by K2 during its Two-Wheeled Concept Engineering Test, is a sub-Neptune (2.5 ± 0.1 R _⊕ , 9.7 ± 1.2 M _⊕ ) orbiting a relatively bright ( K _S = 8.03) K-dwarf star on a 9.1 day period. Unfortunately, due
Erica Thygesen +15 more
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Precise Orbit Determination of GPS Satellites for Real Time Applications [PDF]
Journal of Astronomy and Space Sciences, 2001 The accuracy of GPS applications is heavily dependent on the satellite ephemeris and earth orientation parameter. Specially applications like as the real time monitoring of troposphere and ionosphere require real time or predicted ephemeris and earth ...
Hyung-Chul Lim +4 more
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Correction to the American Ephemeris, 1894, First Edition [PDF]
, 1895 Jr. Tucker R. H.
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Symposium - International Astronomical Union, 1959 In this article is described the measurement of time from a more general point of view than has been taken before. It is shown that mean solar time and ephemeris time are two particular applications of the general principle of measuring time by observing angular motions, a principle that can be applied to any angular motion whatever, provided that an ...
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Applied SciencesThis study addresses the issue of atmospheric delay correction for the rational polynomial coefficient (RPC) model associated with spaceborne synthetic aperture radar (SAR) imagery under conditions lacking ephemeris data, proposing a novel approach to ...
Doudou Hu +3 more
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ARMA Prediction of SBAS Ephemeris and Clock Corrections for Low Earth Orbiting Satellites
International Journal of Aerospace Engineering, 2015 For low earth orbit (LEO) satellite GPS receivers, space-based augmentation system (SBAS) ephemeris/clock corrections can be applied to improve positioning accuracy in real time.
Jeongrae Kim, Mingyu Kim
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On the ephemeris of the eclipsing polar HU Aquarii. II: New eclipse epochs obtained 2014–2018 [PDF]
, 2018 A. D. Schwope, B. D. Thinius
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A 16-parameter GEO Broadcast Ephemeris [PDF]
Journal of Geodesy and Geoinformation Science, 2018 Currently, the broadcast ephemerides used in GEOs are same as those of the MEOs and IGSOs in the BeiDou navigation constellation. However, a trade-off strategy, i.e.
Zhongkai ZHANG,Lan DU,Li LIU,Feng HE,Yu LU,Peiyuan ZHOU
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