Development of Precise Ephemeris Generation Module for Thaichote Satellite Operations [PDF]
, 2013 In this paper, the development of the ephemeris generation module used for the Thaichote satellite operations is presented. It is a vital part of the flight dynamics system, which comprises, the orbit determination, orbit propagation, event prediction and station-keeping maneouvre modules.
Manop Aorpimai, Ponthep Navakitkanok
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Mathematical Modelling and a Numerical Solution for High Precision Satellite Ephemeris Determination [PDF]
arXiv, 2023 In this paper, we develop a high-precision satellite orbit determination model for satellites orbiting the Earth. Solving this model entails numerically integrating the differential equation of motion governing a two-body system, employing Fehlberg's formulation and the Runge-Kutta class of embedded integrators with adaptive stepsize control.
Gundakaram, Aravind +7 more
arxiv +3 more sources
Precision Ephemerides for Gravitational-wave Searches -- IV: Corrected and refined ephemeris for Scorpius X-1 [PDF]
Monthly Notices of the Royal Astronomical Society, 2023 Low-mass X-ray binaries have long been theorised as potential sources of continuous gravitational-wave radiation, yet there is no observational evidence from recent LIGO/Virgo observing runs. Even for the theoretically 'loudest' source, Sco X-1, the upper limit on gravitational-wave strain has been pushed ever lower.
T L Killestein +5 more
arxiv +3 more sources
Variability Type Determination and High Precision Ephemeris for NSVS 7606408 [PDF]
The Journal of the American Association of Variable Star
Observers, vol.40 n.2, 2012, p.955, 2014 A photometric campaign analysis of the star NSVS 7606408 has been conducted in order to determine the type of variability and high accuracy ephemeris. By combining the obtained data with other datasets available, it was tried to improve the determination of the period, highlighting, however, a possible minimal change of the period over the years.
arxiv +3 more sources
The orbit of Triton with new precise observations and the INPOP19a ephemeris [PDF]
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. Numerous precise positions for Triton are obtained from the latest observations using the Gaia catalogue.
Kai Tang +7 more
openalex +3 more sources
Impact of the precise ephemeris on accuracy of GNSS baseline in relative positioning technique [PDF]
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). The accuracy of these baselines in baseline analysis is dominated by inaccuracy satellite positioning and orbit, leading to specified accuracy may not ...
D. T. Tran +3 more
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Incorporation of the GPS satellite ephemeris covariance matrix into the precise point positioning [PDF]
Journal of Geodetic Science, 2013 Masoud Shirazian
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Izračun položaja GPS-satelita iz podatkov preciznih efimerid : GPS-orbit computation from precise ephemeris data [PDF]
Geodetski Vestnik, 2005 The article describes the theoretical point of view of the GPS precise ephemerides application that should be used in most precise GPS processing. Regarding broadcast, precise ephemerides allow us to achieve a much better accuracy of the final GPS ...
Bojan Stopar +1 more
doaj +1 more source
A Study of GPS Precise Ephemeris Interpolation for Maritime Precise Positioning Applications
Journal of Korean navigation and port research, 2009 Currently many vessels determine an overhead obstruction by a rule of thumb based on their draft for maritime navigation. Therefore they doesn`t have a good overhead obstruction clearance because vertical position of vessels varies on time by tidal. As a result, it is occurred maritime accidents that the mainmast of vessels is bumped against overhead ...
Deuk-Jae Cho, Sanghyun Park
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A Simplified BDS Broadcast Ephemeris and State Space Representative (SSR) Matching Method for BDS-Only Real-Time Precise Point Positioning (PPP) [PDF]
IEEE Access, 2019 As opposed to the GPS real-time precise point positioning (PPP) with sophisticated orbit/clock recovery method, BDS real-time PPP applications were limited by the fact that no internationally recognized BDS issue of data (IOD) calculation and matching method was defined.
Junbo Shi +4 more
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