Results 21 to 30 of about 43,155 (284)
Effect of Ephemeris on Pulsar Timing and Navigation Accuracy Based on X-ray Pulsar Navigation-I Data
Universe, 2022 Solar system ephemeris is very important for pulsar timing and navigation. In order to explore the effect of different precision ephemerides on X-ray pulsar timing and navigation, the differences between timing and navigation results with four JPL ...
Yongtao Deng, Shuanggen Jin
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Original Research by Young Twinkle Students (ORBYTS): ephemeris refinement of transiting exoplanets [PDF]
Monthly notices of the Royal Astronomical Society, 2020 We report follow-up observations of transiting exoplanets that have either large uncertainties (>10 min) in their transit times or have not been observed for over 3 yr.
B. Edwards +62 more
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TraMoS: V. Updated ephemeris and multi-epoch monitoring of the hot Jupiters WASP-18Ab, WASP-19b, and WASP-77Ab [PDF]
, 2020 We present 22 new transit observations of the exoplanets WASP-18Ab, WASP-19b, and WASP-77Ab, from the Transit Monitoring in the South (TraMoS) project. We simultaneously model our newly collected transit light curves with archival photometry and radial ...
P. Cortés-Zuleta +7 more
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An Efficient Fault Detection and Exclusion Method for Ephemeris Monitoring
Remote Sensing, 2023 The ephemeris fault needs to be detected and mitigated in the ground-based augmentation system to provide precision approach for the aircraft. In the current fault detection and exclusion (FDE) method, the double-differenced carrier phase (DDCP ...
Yiping Jiang, Wang Li, Hengwei Zhang
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New Data on the Eclipsing Binary V1848 Ori and Improved Orbital and Light Curve Solutions
Open Astronomy, 2020 New observations of the eclipsing binary system V1848 Ori were carried out using the V filter resulting in a determination of new times of minima and new ephemeris were obtained.
Davoudi Fatemeh +13 more
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Elements and ephemeris of comet 1898i
The Astronomical Journal, 1898 William J. Hussey
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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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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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Symposium - International Astronomical Union, 1979 Newcomb's (1898) Tables of Mars with Ross's corrections have been used to compute its ephemeris in national ephemerides. Clemence (1949 and 1961) constructed a more precise theory of Mars and determined preliminary mean elements using a limited number of observations. Laubscher (1971) compared Clemence's theory with about 11000 observations by meridian
Hiroshi Nakai, Hiroshi Kinoshita
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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.
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