Results 31 to 40 of about 22,923 (213)
A Study on Satellite Diagnostic Expert Systems Using Case-Based Approach [PDF]
Journal of Astronomy and Space Sciences, 1997 Many research works are on going to monitor and diagnose diverse malfunctions of satellite systems as the complexity and number of satellites increase. Currently, many works on monitoring and diagnosis are carried out by human experts but there are needs
Young-Tack Park +2 more
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Communications Satellite System by Using Moon Orbit Satellite Constellation [PDF]
Journal of Astronomy and Space Sciences, 2003 A communications satellite system placed in three-Lagrange points, L3, L4, and L5, of the restricted three-body problem in Earth-Moon system is proposed in this paper. LEO satellite constellation has been another choice of communications system.
Sanguk Lee, Jae Hoon Kim, Seong-Pal Lee
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A Study on an Object oriented Modeling for the Satelite Control System Development reusing Structured Analysis and Design Approach [PDF]
Journal of Astronomy and Space Sciences, 1998 The object-oriented approach is a difficult method for engineers who are accustomed to other software development methods although it is an excellent software development approach.
Jaehoon Kim, Wonchan Jung, Sangbum Lee
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Wideband Cooperative Localization Through Generalized Cross-Correlation
IEEE AccessThis work proposes a novel algorithm for robust cooperative localization using wideband time difference of arrival (TDoA) measurements and information coupling between nodes.
Andreas Fuchs +2 more
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Journal of Electrical and Computer Engineering, 2010 This paper addresses the problem of recovering the code phase of the composite spreading sequence for a CDMA 1x signal transmitted from a handset, without the benefit of a priori information from the system.
Ron Kerr, John Lodge
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NORAD TLE Conversion from Osculating Orbital Element [PDF]
Journal of Astronomy and Space Sciences, 2002 The NORAD type Two Line Element (TLE) was obtained from the osculating orbital elements by an iterative approximation procedure. The mathematical model was presented and computer program was developed for the conversion.
Byoung-Sun Lee
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Satellite communications for emergency [PDF]
2012 IEEE First AESS European Conference on Satellite Telecommunications (ESTEL), 2012 This paper aims at defining the role of a satellite component in an integrated communications, localization and monitoring system, which can be used in all emergency management phases. Particular attention will be given to the integration of the satellite and terrestrial components and of the different functionalities.
openaire +2 more sources
Station-Keeping Maneuver Simulation for the Koreasat Spacecraft Using Mission Analysis Software [PDF]
Journal of Astronomy and Space Sciences, 1995 A series of east/west and north/south station-keeping maneuvers were simulated for the KOREASAT spacecraft which has to be maintained within ±0°.05 at the nominal longitude of 116°E. Weekly and biweekly based station-keeping maneuver plannings were used,
Byoung-Sun Lee, Jong Won Eun
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Access and mobility management technologies for 6G satellite communications network
Dianxin kexue, 2021 Analsisand outlook for satellite communication access and mobility management technology in 6G network was presented.Firstly, the access technology of current global representative satellite mobile communications system was introduced, as well as the ...
Xiaowen WU +5 more
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The Journal of Engineering, 2016 The design of spectrally-efficient, high-throughput satellite (HTS) systems with capacity approaching one terabit per second requires operating at Ka-band frequencies and above, where there are several gigahertz of allocated radio spectrum, using ...
Abdulkareem Sarki Karasuwa +2 more
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