Results 21 to 30 of about 4,598 (208)
Highlights of Astronomy, 1995 The location-independent part of TCB–TCG, the difference between the two new time scales adopted by the IAU (1992), was integrated numerically for three JPL planetary/lunar ephemerides; DE102, DE200, and DE245. The differences among these three integrations were mostly explained by the difference in the adopted constants of the ephemerides.
openaire +1 more source
Validation of Geostationary Earth Orbit Satellite Ephemeris Generated
Journal of Astronomy and Space Sciences, 2018 This study presents the generation and accuracy assessment of predicted orbital ephemeris based on satellite laser ranging (SLR) for geostationary Earth orbit (GEO) satellites.
Hyungjik Oh +5 more
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CALCULATION AND MAPPING OF TIDAL LUNAR IMPACTS ON THE EARTH SPHEROID
InterCarto. InterGIS, 2017 The major method used in this study is processing of data arrays in order to obtain statistical data. Statistical methods of research use the parameter of frequency to characterize the recurrence of events in time and space.
O. V. Zenkin
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TESS Timings of 31 Hot Jupiters with Ephemeris Uncertainties
The Astrophysical Journal Supplement Series, 2023 A precise transit ephemeris serves as the premise for follow-up exoplanet observations. We compare TESS Object of Interest (TOI) transit timings of 262 hot Jupiters with the archival ephemeris and find 31 of them having TOI timing offsets, among which ...
Su-Su Shan +10 more
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SEA WAVE DIAGNOSTICS BY RADIO EMISSIONS FROM ARTIFICIAL EARTH SATELLITES IN DIFFERENT FREQUENCY BANDS [PDF]
Radio Physics and Radio AstronomySubject and Purpose. The present paper is concerned with sea wave diagnostics by signals from artificial satellites in a bistatic radar scheme using the grazing radio-wave propagation and a diffuse component of the signal reflected off the sea surface ...
V. B. Zamaraev +2 more
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Sensors, 2020 At present, Global Position System (GPS) navigation ephemeris mainly broadcasts satellite orbits with meter-level precision for standard point positioning and precise relative positioning. With the rapid development of real-time precise point positioning
Dehai Li +5 more
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Analysis of Solar and Lunar Motions in the Seonmyeong Calendar
Journal of Astronomy and Space Sciences, 2019 We investigate solar and lunar motions in the Seonmyeong (SM) calendar that was compiled by Xu, Ang of the Tang dynasty (A.D. 618-907) in China and used for 71 years from 822 to 892.
Ki-Won Lee
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Observations of the Rigollet Comet from Korea and Japan [PDF]
Journal of Astronomy and Space Sciences, 2014 Since Rigollet first discovered a comet in 1939, many follow-up observations have been made, particularly in Europe. It is now known that the Rigollet comet is identical with the one observed by Herschel in 1788, and thus it is now called 35P/1939 O1 ...
Ki-Won Lee +3 more
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Bartolomeu Lourenço de Gusmão: o primeiro cientista brasileiro
Revista Brasileira de Ensino de FísicaBartolomeu Lourenço de Gusmão foi o primeiro inventor e cientista brasileiro, célebre pela criação do balão a ar quente em 1709. Nos 300 anos de sua mais famosa invenção, este artigo apresenta uma nova biografia do fundador da Aerostática e um estudo ...
Rodrigo Moura Visoni +1 more
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Jurnal Ilmiah Islam Futura, 2017 Data of solar coordinate such as longitude and latitude of the ecliptic, declination, and right ascension are the data that are often involved in astronomical reckoning and practical islamic astronomy.
reza akbar
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