Results 11 to 20 of about 31,010 (266)
Optimal Progressive Pitch for OneWeb Constellation with Seamless Coverage
Sensors, 2022 Large-scale broadband low earth orbit (LEO) satellite systems have become a possibility due to decreased launch costs and rapidly evolving technology. Preventing huge LEO satellite constellations from interfering with the geostationary earth orbit (GSO ...
Cheng Zou +5 more
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Applied Sciences, 2021 Timely and effective detection of potential incipient faults in satellites plays an important role in improving their availability and extending their service life. In this paper, the problem of detecting incipient faults using projection vector (PV) and
Ge Zhang +4 more
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Adaptive Access Selection Algorithm for Large-Scale Satellite Networks Based on Dynamic Domain
Sensors, 2022 The traditional satellite access selection algorithm, which is used in large-scale satellite networks, has some disadvantages, such as frequent link switching, high interrupt probability, and unable to adapt to a dynamic environment.
Gaosai Liu +5 more
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Analytical design and performance analysis of LEO mega chain satellite constellation
Xibei Gongye Daxue Xuebao, 2022 With the development of microsatellite technology and the growth of ground reconnaissance demand, the rapid design of a LEO constellation with minimum satellite number, low revisit time (within 10 minutes), and permanent inter-satellite links has become ...
ZHENG Pengfei, CHEN Hongyu, GUO Chongbin
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IEEE Access, 2023 The algorithm for star identification is a crucial technology for determining the orientation of spacecraft using star sensors. Traditional star identification algorithms achieve matching by seeking a unique or a few optimal solutions.
Haodong Yan +5 more
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Sensors, 2022 Low Earth Orbit (LEO) satellite communication networks have become an important means to provide internet access services for areas with limited infrastructure. Compared with the Geostationary Earth Orbit (GEO) satellites, the LEO satellites have limited
Shengjun Guo +5 more
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Microsatellite Instability in Yeast: Dependence on the Length of the Microsatellite [PDF]
Genetics, 1997 One of the most common microsatellites in eukaryotes consists of tandem arrays [usually 15-50 base pairs (bp) in length] of the dinucleotide GT. We examined the rates of instability for poly GT tracts of 15, 33, 51, 99 and 105 bp in wild-type and mismatch repair-deficient strains of Saccharomyces cerevisiae. Rates of instability increased more than two
M, Wierdl, M, Dominska, T D, Petes
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Time Frequency Direction Modulation Based on Nonlinear Frequency Diverse Array
IEEE Access, 2023 The conventional frequency diversity array (FDA) can generate arcsine form of continuous direction modulation (DM) waveforms which can automatically scan the entire space range.
Haihua Xie +4 more
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A Satellite Incipient Fault Detection Method Based on Decomposed Kullback–Leibler Divergence
Entropy, 2021 Detection of faults at the incipient stage is critical to improving the availability and continuity of satellite services. The application of a local optimum projection vector and the Kullback–Leibler (KL) divergence can improve the detection rate of ...
Ge Zhang +4 more
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A Framework for Assessing the Interference from NGSO Satellite Systems to a Radio Astronomy System
Applied Sciences, 2023 As the number of non-geostationary orbit (NGSO) satellites continues to grow, interference with other communication systems, including radio astronomy systems (RASs), is becoming increasingly critical.
Cheng Zou +7 more
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