Results 21 to 30 of about 4,335 (249)

Multi-LEO Satellite Stereo Winds

Remote Sensing, 2023
The stereo-winds method follows trackable atmospheric cloud features from multiple viewing perspectives over multiple times, generally involving multiple satellite platforms. Multi-temporal observations provide information about the wind velocity and the observed parallax between viewing perspectives provides information about the height.
James L. Carr, Dong L. Wu, Mariel D. Friberg, Tyler C. Summers   +3 more
openaire   +2 more sources

A Modified Regular Perturbation Model for the Single-Span Fiber Transmission Using Learnable Methods

Photonics
In fiber optic communication systems, the dispersion and nonlinear interaction of optical signals are critical to modeling fiber optic communication, and the regular perturbation (RP) model is a simplified modeling method composed of parallel branches ...
Shuhong He, Zhongya Li, Sizhe Xing, An Yan, Yingjun Zhou, Jianyang Shi, Chao Shen, Ziwei Li, Zhixue He, Wei Chen, Nan Chi, Junwen Zhang   +11 more
doaj   +1 more source

Analysis on BDS-3 Autonomous Navigation Performance Based on the LEO Constellation and Regional Stations

Remote Sensing, 2023
The global navigation satellite system (GNSS) is developing rapidly, and the related market applications and scientific research are increasing. Studies based on large low Earth orbit (LEO) satellite constellations have become research hotspots.
Baopeng Xu, Xing Su, Zhimin Liu, Mudan Su, Jianhui Cui, Qiang Li, Yan Xu, Zeyu Ma, Tao Geng   +8 more
doaj   +1 more source

Multiple Antenna Configuration of LEO-MIMO Feeder Link for High Channel Capacity

IEEE Access
We investigated low Earth orbit satellite (LEO) communications applying Multiple-Input/Multiple-Output (MIMO) technology to the feeder link transmission between a satellite and gateway antennas to improve the channel capacity.
Daisuke Goto, Kiyohiko Itokawa, Koyo Tategami, Fumihiro Yamashita   +3 more
doaj   +1 more source

Resource Allocation for LEO Beam-Hopping Satellites in a Spectrum Sharing Scenario

IEEE Access, 2021
In recent years, low earth orbit (LEO) satellite constellation systems have been developed rapidly. However, the scarcity of satellite spectrum resources has become one of the major obstacles to this trend.
Jingyu Tang, Dongming Bian, Guangxia Li, Jing Hu, Jian Cheng   +4 more
doaj   +1 more source

Darkening Low-Earth Orbit Satellite Constellations: A Review

IEEE Access, 2022
The proliferation of low-earth orbit (LEO) satellites and the LEO satellite internet will be a game-changer for the low-latency high-speed global internet.
Ali Lalbakhsh, Andrew Pitcairn, Kaushik Mandal, Mohammad Alibakhshikenari, Karu P. Esselle, Sam Reisenfeld   +5 more
doaj   +1 more source

Satellite handover techniques for LEO networks [PDF]

International Journal of Satellite Communications and Networking, 2004
AbstractLow earth orbit satellite constellations could play an important role in future mobile communication networks due to their characteristics, such as global coverage and low propagation delays. However, because of the non‐stationarity of the satellites, a call may be subjected to handovers, which can be cell or satellite handovers.
Papapetrou, E., Karapantazis, S., Dimitriadis, G., Pavlidou, F. N.   +3 more
openaire   +2 more sources

Circulating microRNA signatures of cachexia and cancer in Canis familiaris as a comparative oncology model for human disease

Molecular Oncology, EarlyView.
Circulating microRNAs as biomarkers of cachexia and sex‐specific cancer in senior dogs. In 25 client‐owned dogs, four circulating miRNAs (miR‐15a, miR‐15b, miR‐16, miR‐140) were downregulated in cachexia, with miR‐16 the strongest individual biomarker (AUC = 0.899).
Soon‐Seok Park, Kyongman An, Gyeonghwa Kim, Soo‐Nyun Choi, Hong‐Ki Lee, Keun Hur, Kyu‐Shik Jeong   +6 more
wiley   +1 more source

Feasibility of Using Beam Steering to Mitigate Ku-Band LEO-to-GEO Interference

IEEE Access, 2022
Low-Earth orbiting (LEO) satellites now hold promise to provide broadband service anywhere in the world, but they must share the radio spectrum with geosynchronous Earth-orbiting (GEO) satellites. The United Nations International Telecommunications Union
Alex Hills, Jon M. Peha, Jens Munk
doaj   +1 more source

Delivery of DNA‐encoded vaccines and proteins in mice using cutaneous suction‐mediated transfection

FEBS Open Bio, EarlyView.
Cutaneous suction‐mediated transfection in mice for delivery of DNA‐encoded vaccines and proteins. A critical limitation of DNA vaccines and other therapeutics is transfection in vivo to produce the encoded antigens or therapeutic proteins. Cutaneous suction‐based methods have demonstrated effectiveness in many animal models and have been successfully ...
Emran O. Lallow, Isabel Brandtjen, Yaxin Mo, Melissa Gulley, Louis Osorio, Sagar Kudchodkar, Nandita C. Jhumur, Christine C. Roberts, Lisa K. Denzin, David I. Shreiber, Biju Parekkadan, Hao Lin, Joel N. Maslow   +12 more
wiley   +1 more source