Results 41 to 50 of about 201,777 (208)

Development Strategy of Orbit Determination System for Korea’s Lunar Mission: Lessons from ESA, JAXA, ISRO and CNSA’s Experiences [PDF]

Journal of Astronomy and Space Sciences, 2014
In this paper, a brief but essential development strategy for the lunar orbit determination system is discussed to prepare for the future Korea’s lunar missions.
Young-Joo Song, Sang-il Ahn, Eun-Sup Sim
doaj   +1 more source

An Improved Range-Searching Initial Orbit-Determination Method and Correlation of Optical Observations for Space Debris

Applied Sciences, 2023
The Changchun Observatory of the National Astronomical Observatories, Chinese Academy of Sciences, and the Shanghai Astronomical Observatory are used to generate very short arc (VSA) angle observations of objects in low Earth orbit (LEO) and ...
Xiangxu Lei, Shengfu Xia, Hongkang Liu, Xiaozhen Wang, Zhenwei Li, Baomin Han, Jizhang Sang, You Zhao, Hao Luo   +8 more
doaj   +1 more source

Precise Orbit Determination of Mars-crossing Asteroids

The Astronomical Journal
This study investigates the orbit determination of the Mars-crossing asteroids (MCAs) with a focus on the possibility of detecting their Yarkovsky signals. We analyze the influences of force model uncertainties on MCA orbits, including the uncertainty of
Xin Liu, Xi-Yun Hou, Jun Yao, Shanhong Liu, Roberto Armellin, Qingbo Gan, Zhitao Yang   +6 more
doaj   +1 more source

A geometric model for Hochschild homology of Soergel bimodules

, 2007
An important step in the calculation of the triply graded link homology theory of Khovanov and Rozansky is the determination of the Hochschild homology of Soergel bimodules for SL(n).
Akyıldız, Ben Webster, Bernstein, Beĭlinson, Geordie Williamson, Soergel   +5 more
core   +3 more sources

Direct Initial Orbit Determination

IEEE Transactions on Aerospace and Electronic Systems
Initial orbit determination (IOD) is an important early step in the processing chain that makes sense of and reconciles the multiple optical observations of a resident space object. IOD methods generally operate on line-of-sight (LOS) vectors extracted from images of the object, hence the LOS vectors can be seen as discrete point samples of the raw ...
Chee-Kheng Chng, Trent Jansen-Sturgeon, Timothy Payne, Tat-Jun Chin   +3 more
openaire   +2 more sources

PPP-based Swarm kinematic orbit determination [PDF]

Annales Geophysicae, 2018
The Swarm mission of the European Space Agency (ESA) offers excellent opportunities to study the ionosphere and to provide temporal gravity field information for the gap between the Gravity Recovery and Climate Experiment (GRACE) and its follow-on ...
L. Ren, S. Schön
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ICESat‐2 Precision Orbit Determination

Earth and Space Science, 2021
The ICESat‐2 Precision Orbit Determination (POD) system computes the precise position of the laser altimeter instrument in inertial space, a measurement necessary for accurate geolocation of individual photon surface returns.
T. C. Thomas, S. B. Luthcke, T. A. Pennington, J. B. Nicholas, D. D. Rowlands   +4 more
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Orbit determination and control for the European Student Moon Orbiter [PDF]

, 2012
This paper presents the preliminary navigation and orbit determination analyses for the European Student Moon Orbiter. The severe constraint on the total mission Delta nu and the all-day piggy-back launch requirement imposed by the limited available ...
Gibbings, Alison, Martinez, Cesar, Rizzi, Francesco, Vasile, Massimiliano, Vetrisano, Massimo, Zuiani, Federico   +5 more
core   +1 more source

Perturbed initial orbit determination

Astrodynamics
An algorithm for robust initial orbit determination (IOD) under perturbed orbital dynamics is presented. By leveraging map inversion techniques defined in the algebra of Taylor polynomials, this tool returns a highly accurate solution to the IOD problem and estimates a range centered on the aforementioned solution in which the true orbit should lie. To
Fossà, Alberto, Losacco, Matteo, Armellin, Roberto   +2 more
openaire   +2 more sources

Orbit Propagation and Determination of Low Earth Orbit Satellites

International Journal of Antennas and Propagation, 2014
This paper represents orbit propagation and determination of low Earth orbit (LEO) satellites. Satellite global positioning system (GPS) configured receiver provides position and velocity measures by navigating filter to get the coordinates of the orbit ...
Ho-Nien Shou
doaj   +1 more source