Results 21 to 30 of about 4,565,671 (287)
Applicable Tracking Data Arcs for NORAD TLE Orbit Determination of the KOMPSAT-1 Satellite Using GPS Navigation Solutions [PDF]
Journal of Astronomy and Space Sciences, 2005 NORAD Two Line Element (TLE) is very useful to simplify the ground station antenna pointing and mission operations. When a satellite operations facility has the capability to determine NORAD type TLE which is independent of NORAD, it is important to ...
Byoung-Sun Lee
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Aerospace, 2023 Continuous thrust spacecraft in circular orbits have had a great influence on the identification and cataloging of space targets. Gaussian-type orbital element variational equations are simplified and approximated. Ground-based radar observation datasets
Shuailong Zhao, Xuefeng Tao, Zhi Li
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IEEE Access, 2022 The problem of initial orbit determination (IOD) for Low Earth Orbit (LEO) objects using bistatic radar too-short arc (TSA) observations is addressed. For TSA observations, the traditional IOD methods suffer low accuracy.
Jinye Qu +4 more
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Determination of Orbital Elements and Ephemerides using the Geocentric Laplace’s Method
Journal of Astronomy and Space Sciences, 2020 This paper presents a methodology for Initial Orbit Determination (IOD) based on a modification of the Laplace’s geocentric method. The orbital elements for Near-Earth asteroids (1864) Daedalus, 2003 GW, 2019 JA8, a Hungaria-type asteroid (4690 ...
Daniela Espitia +2 more
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Perturbations in the optimized boundary value initial orbit determination approach [PDF]
, 2019 One of the increasing threats to functional spacecraft around Earth is that of Space Debris. The risks that it poses for current and future space operations due to collisions are growing in an exponential manner.
Schildknecht, Thomas +2 more
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A More Reliable Orbit Initialization Method for LEO Precise Orbit Determination Using GNSS [PDF]
Remote Sensing, 2020 Precise orbit determination (POD) using GNSS has been rapidly developed and is the mainstream technology for the navigation of low Earth orbit (LEO) satellites. The initialization of orbit parameters is a key prerequisite for LEO POD processing. For a LEO satellite equipped with a GNSS receiver, sufficient discrete kinematic positions can be obtained ...
Xuewen Gong +3 more
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Measuring the Orbit Drift of Near-Earth Asteroids by the Yarkovsky Effect
The Astrophysical Journal, 2023 The Yarkovsky effect causes the semimajor axis drift of near-Earth asteroids. The drift can be detected by a precise orbit determination process. Using the proposed algorithm, 2233 out of 27,078 near-Earth asteroids are chosen as the initial candidates ...
Xin Liu +4 more
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Geostationary Orbit Surveillance Using the Unscented Kalman Filter and the Analytical Orbit Model [PDF]
Journal of Astronomy and Space Sciences, 2011 A strategy for geostationary orbit (or geostationary earth orbit [GEO]) surveillance based on optical angular observations is presented in this study. For the dynamic model, precise analytical orbit model developed by Lee et al.
Kyoung-Min Roh +2 more
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Bistatic Radar Observations Correlation of LEO Satellites Considering J2 Perturbation
Mathematics, 2022 Space debris near Earth severely interferes with the development of space, and cataloging space objects is increasingly important. Since optical telescopes and radars used to detect space debris only provide short-arc observations, mathematical ...
Zongbo Huyan +4 more
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Initial Orbit Determination from Only Heading Measurements
Journal of Spacecraft and Rockets, 2023 This work introduces the problem of initial orbit determination (IOD) from only heading measurements. Such a problem occurs in practice when estimating the orbit of a spacecraft using visual odometry measurements from an optical camera. After reviewing the problem geometry, a simple solution is developed in the form of an iterative scheme on the ...
openaire +3 more sources