Results 31 to 40 of about 753 (114)

A Comparative study on ranging accuracy and interference robustness of LEO-PNT systems in urban and rural scenarios

Satellite Navigation
While Global Navigation Satellite Systems (GNSS) have been the primary Positioning, Navigation, and Timing (PNT) solution since their advent, new technologies are being sought to address the limitations of GNSS.
Guillem Foreman-Campins, José A. López-Salcedo, Elena Simona Lohan   +2 more
doaj   +1 more source

Research on the digital design of LEO constellation systems based on MBSE

Dianxin kexue
Compared to traditional high-throughput satellites and ground networks, low earth orbit (LEO) satellite Internet offers significant advantages such as wide coverage, low latency, broadband capacity, and cost-effectiveness.
ZHANG Peng, WANG Tianshu, MA Wei, ZHANG Shijie, ZHAO Xiangtian, ZHAO Yafei   +5 more
doaj  

Mercator Projection Superposition: A Computationally Efficient Alternative to Grid-Based Coverage Analysis for LEO Mega-Constellations

Applied Sciences
Grid point approaches for LEO mega-constellation coverage analysis become computationally prohibitive for constellations exceeding 103 satellites due to exponential complexity growth.
Guanhua Feng, Linli Lv, Wenhao Li
doaj   +1 more source

SpaceNet: A Resource-Efficient Simulation Testbed for LEO Mega-Constellation Networks

IEEE Access
The rapid expansion of low Earth orbit (LEO) mega-constellations, such as SpaceX’s Starlink and Amazon’s Kuiper, aim to transform Internet access.
Bruce Barbour, Alexander Kedrowitsch, John Downs, Deven Mhadgut, Suryansh Aryan, Jonathan Black, Samantha Parry Kenyon   +6 more
doaj   +1 more source

Analytical Modeling of LEO Satellite Mutual Visibility under Perturbations

Communications in Science and Technology
This present study develops an analytical model for mutual visibility in perturbed Low Earth Orbit (LEO), explicitly accounting for Earth’s oblateness (J2 and J3) and atmospheric drag.
Mohamed R Amin
doaj   +1 more source

Network Planning Method and Simulation Analysis for Large-Scale Low Earth Orbit Satellite Constellation Networks

天地一体化信息网络, 2020
Thanks to the advantages of global coverage, high capacity and low latency, the large-scale LEO satellite constellation networks has become a hot spot for global development.However, planning methods and simulation modeling research for LS-LEOSCN has not
Lixiang LIU, Shuaijun LIU
doaj   +2 more sources

Mega LEO Satellite Constellations Networking: Challenges and Key Technologies

天地一体化信息网络
Owing to the advances in satellite manufacturing and rocket launch technology, the deployment of mega LEO constellations has become an important direction for the development of satellite Internet.
SUN Yaohua, FENG Xinao, PENG Mugen
doaj  

Basic Orbit Design and Maneuvers for Satellite Constellations Deployed Using Momentum Exchange Tethers

Aerospace
This article describes a new alternative approach to satellite constellation deployment by incorporating momentum exchange tethers (METs). Traditional methods of deploying satellite constellations have limitations, typically involving costly propulsion ...
Ben Campbell, Lawrence Dale Thomas
doaj   +1 more source

Communication and navigation integration for LEO constellations:status, opportunities, and challenges

Dianxin kexue, 2023
With the growing maturity of millimeter wave technology and high-throughput satellite communication technology, as well as the urgent need for global broadband communication services, the construction of LEO giant communication constellation has ...
Yafei ZHAO, Bing YAN, Yaohua SUN, Mugen PENG   +3 more
doaj  

Overview and Key Technology of the Membrane Drag Sail for Low Earth Orbit Satellite Deorbit

Space: Science & Technology
With the escalating frequency of space activities, particularly the launch of constellation satellites, the amount of space debris experienced gradually increases, posing threats to the safety and sustainability of the space environment.
Ruonan Zhang, Keying Yang, Jingrui Zhang, Sifeng Bi   +3 more
doaj   +1 more source