Results 21 to 30 of about 2,425,563 (382)
Dual Quaternion Based Close Proximity Operation for In-Orbit Assembly via Model Predictive Control
International Journal of Aerospace Engineering, 2021 This paper studies the problem of guidance and control for autonomous in-orbit assembly. A six-degree-of-freedom (6-DOF) motion control for in-orbit assembly close proximity operation between a service satellite and a target satellite is addressed in ...
Chuqi Sun +3 more
doaj +1 more source
, 2023 The fifth generation (5G) wireless communication systems development has brought about a paradigm shift using advanced technologies; including softwarization, virtualization, massive MIMO, and ultradensification, in addition to introducing new frequency bands.
Kota, Sastri +39 more
openaire +3 more sources
Inferring viral quasispecies spectra from 454 pyrosequencing reads
BMC Bioinformatics, 2011 Background RNA viruses infecting a host usually exist as a set of closely related sequences, referred to as quasispecies. The genomic diversity of viral quasispecies is a subject of great interest, particularly for chronic infections, since it can lead ...
Măndoiu Ion +6 more
doaj +1 more source
Satellite Navigation, 2020 The BeiDou system (BDS) plays a significant role in people’s lives, but its security is easily affected by spoofing attacks. The radio determination satellite service (RDSS) is a special service of BDS that provides two-way communication, positioning ...
Fei Wang +4 more
doaj +1 more source
On the virtualization and dynamic orchestration of satellite communication services [PDF]
, 2016 Key features of satellite communications such as wide-scale coverage, broadcast/multicast support and high availability, together with significant amounts of new satellite capacity coming online, anticipate new opportunities for satellite communications ...
Ahmed, Toufik +8 more
core +2 more sources
The Low Earth Orbit Satellite Population and Impacts of the SpaceX Starlink Constellation [PDF]
Astrophysical Journal, 2020 I discuss the current low Earth orbit artificial satellite population and show that the proposed “megaconstellation” of circa 12,000 Starlink Internet satellites would dominate the lower part of the Earth orbit, below 600 km, with a latitude-dependent ...
J. McDowell
semanticscholar +1 more source
BOC Signal Acquisition Algorithm Based on Similar Enfoldment
International Journal of Aerospace Engineering, 2020 A BOC signal has been widely used in the Global Navigation Satellite System (GNSS). Although the BOC signal has many advantages, the autocorrelation function (ACF) of the BOC signal has lots of peaks, which makes signal acquisition difficult.
Qi Han +5 more
doaj +1 more source
FY-3C/VIRR Sea Surface Temperature Products and Quality Validation
应用气象学报, 2020 Sea surface temperature (SST) products are generated at National Satellite Meteorological Center (NSMC) of China Meteorological Administration (CMA) from the visible and infrared radiometer (VIRR) on board FY-3C polar orbiting satellite.
Wang Sujuan +8 more
doaj +1 more source
Post-transcriptional regulation of satellite cell quiescence by TTP-mediated mRNA decay. [PDF]
, 2015 Skeletal muscle satellite cells in their niche are quiescent and upon muscle injury, exit quiescence, proliferate to repair muscle tissue, and self-renew to replenish the satellite cell population.
Blackshear, Perry J +7 more
core +2 more sources
Nature Communications, 2020 Accurate and comprehensive measurements of economic well-being are fundamental inputs into both research and policy, but such measures are unavailable at a local level in many parts of the world. Here we train deep learning models to predict survey-based
Christopher Yeh +7 more
semanticscholar +1 more source