Results 61 to 70 of about 41,139 (300)
Pluto’s ephemeris from ground-based stellar occultations (1988–2016) [PDF]
Astronomy & Astrophysics, 2019 Context. From 1988 to 2016, several stellar occultations have been observed to characterise Pluto’s atmosphere and its evolution. From each stellar occultation, an accurate astrometric position of Pluto at the observation epoch is derived.
J. Desmars +15 more
semanticscholar +1 more source
The fettered and the flea: a new poem by Edmund Waller☆
Renaissance Studies, EarlyView.Abstract This contribution explores for the first time a 22‐line poem in a British Library manuscript, ‘To a young lady that kept a flea chay'nd in a box’, which can be convincingly ascribed to Edmund Waller. Its most famous relative is Donne's ‘The Flea’, but its ancestry differs.
Stuart Gillespie
wiley +1 more source
Satellite Navigation, 2023 Previous studies have not evaluated the systematic errors implied in the third generation of BeiDou-3 Navigation Satellite System (BDS-3) broadcast ephemeris.
Min Li +4 more
doaj +1 more source
Seasonality and Albedo Dependence of Cloud Radiative Forcing in the Upper Colorado River Basin
Journal of Geophysical Research: Atmospheres, Volume 130, Issue 6, 28 March 2025.Abstract Mountains create and enhance their own clouds, which both scatter and absorb shortwave radiation from the sun and absorb and re‐emit land surface and atmospheric longwave radiation. However, the impacts of clouds on the surface radiation balance in high elevation snowy mountain terrain are poorly explored.
William Rudisill +4 more
wiley +1 more source
The orbit of Triton with new precise observations and the INPOP19a ephemeris
Astronomy & Astrophysics, 2020 Aims. The Gaia catalogue brings new opportunities and challenges to high-precision astronomy and astrometry. The precision of data reduction is therefore improved by a large number of reference stars with high-precision positions and proper motions ...
K. Tang +7 more
semanticscholar +1 more source
Remote Sensing, 2022 Integrity is one of the key indicators used to characterize the performance of the global navigation satellite systems (GNSSs) and is closely related to user safety.
Lei Chen +10 more
doaj +1 more source
Improved Chebyshev series ephemeris generation capability of GTDS [PDF]
, 1980 An improved implementation of the Chebyshev ephemeris generation capability in the operational version of the Goddard Trajectory Determination System (GTDS) is described.
Jacintho, J. J., Liu, S. Y., Rogers, J.
core +1 more source
Saturn's Small‐Scale Winds Revealed by Its High‐Degree Gravity Field
Geophysical Research Letters, Volume 52, Issue 5, 16 March 2025.Abstract During its Grand Finale, the Cassini spacecraft collected crucial gravity data, revealing Saturn's low‐degree gravity harmonics and large‐scale zonal winds extending about 8,000 km deep. However, determining the high‐degree gravity field, essential for understanding small‐scale atmospheric dynamics, is challenging due to the limited spatial ...
S. Kim +4 more
wiley +1 more source
Impact of the precise ephemeris on accuracy of GNSS baseline in relative positioning technique
Vietnam Journal of Earth Sciences, 2020 For advanced geodesy tasks that require high-accuracy, such as tectonics, surveying services usually use not only long-baselines but also the duration of tracking GNSS satellites in a long (e.g., 24/7).
D. T. Tran +3 more
semanticscholar +1 more source
Ephemeris refinement of 21 hot Jupiter exoplanets with high timing uncertainties [PDF]
Astronomy & Astrophysics, 2018 Transit events of extrasolar planets offer a wealth of information for planetary characterization. However, for many known targets, the uncertainty of their predicted transit windows prohibits an accurate scheduling of follow-up observations.
M. Mallonn +34 more
semanticscholar +1 more source