Results 41 to 50 of about 513,787 (184)
Validation of GPS Based Precise Orbits Using SLR Observations [PDF]
Journal of Astronomy and Space Sciences, 2009 In this study, the YLPODS (Yonsei Laser-ranging Precision Orbit Determination System) is developed for POD using SLR (Satellite Laser Ranging) NP (Normal Point) observations. The performance of YLPODS is tested using SLR NP observations of TOPEX/POSEIDON
Young-Rok Kim +7 more
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Navigation, 2022 A comprehensive study on the autonomous orbit determination (AOD) performance of satellite pairs in halo orbits and distant retrograde orbits (DROs) is carried out.
Zhao-Yang Gao, Xi-Yun Hou
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ROUTING IN LOW EARTH ORBIT (LEO) SATELLITE SYSTEMS BY USING THE GENETIC ALGORITHMS
Electrica, 2006 Today most of the satellite systems are designed in Low Earth Orbit (LEO) satellite systems.Because the satellites which are located in these orbits have small propagation delays than the satellites in other orbits.
Derya YILTAS, A. Halim ZAIM
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Geosynchronous Satellite Orbit Determination [PDF]
International Astronomical Union Colloquium, 1997 AbstractThe paper presents the results of the orbit determination of geosynchronous satellites derived from 1921 positional observations of a few dozens of satellites obtained at the double wide-angle astrograph DWA (D=0.4m, F=2m) of the Main Astronomical Observatory of the National Academy of Sciences of Ukraine in 1985–1991.
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Coordinated orbit transfer for satellite clusters [PDF]
Proceedings of the 41st IEEE Conference on Decision and Control, 2002., 2004 Abstract:We propose a control law that allows a satellite formation to achieve orbit transfer. During the transfer, the formation can be either maintained or modified to a desired formation. Based on the orbit transfer control law proposed by Chang, Chichka, and Marsden for single satellite, we add coupling terms to the summation of Lyapunov functions ...
Zhang, Fumin +1 more
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Determination of Clock Offset Using GPS Carrier Phase Measurements [PDF]
Journal of Astronomy and Space Sciences, 2005 Every time laboratory in the world follows an international standard time scale and GPS (Global Positioning System) is playing an important role. Korea Research Institute of Standards and Science is also operating a permanent GPS station for time ...
Jihyun Ha, Kwan-Dong Park, Chang-Bok Lee
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BeiDou Satellites Assistant Determination by Receiving Other GNSS Downlink Signals
International Journal of Antennas and Propagation, 2016 GNSS’s orbit determinations always rely on ground station or intersatellite links (ISL). In the emergency of satellite-to-ground links and ISL break-off, BeiDou navigation satellite system (BDS) satellites cannot determine their orbits. In this paper, we
Lei Chen +5 more
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Satellite surveillance and the orbital unconscious
New Media & Society, 2023 Satellite data are frequently attached to discourses of infallibility, objectivity and omnipresence. Yet the value of satellite data in everyday society largely depends on the strength of our interpretations, interpretations which are easily misled. Satellite images can be fabricated, misread and restricted, yet companies like Google encourage users to
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UniverseThis paper has the goal of exploring the potential of electromagnetic propulsion systems based on tethers to create artificial Sun-synchronous orbits for remote sensing satellites, as well as performing station-keeping maneuvers and de-orbiting of the ...
Antonio F. B. A. Prado +1 more
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Universe, 2019 HERO (Highly Eccentric Relativity Orbiter) is a space-based mission concept aimed to perform several tests of post-Newtonian gravity around the Earth with a preferably drag-free spacecraft moving along a highly elliptical path fixed in its plane ...
Lorenzo Iorio
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