Results 1 to 10 of about 796 (144)

A Scalable Solution for Node Mobility Problems in NDN-Based Massive LEO Constellations [PDF]

Sensors
In recent years, there has been increasing investment in the deployment of massive commercial Low Earth Orbit (LEO) constellations to provide global Internet connectivity.
Miguel Rodríguez Pérez, Sergio Herrería Alonso, José Carlos López Ardao, Andrés Suárez González   +3 more
doaj   +2 more sources

Hierarchical Resource Management for Mega-LEO Satellite Constellation. [PDF]

Sensors (Basel)
The mega-low Earth orbit (LEO) satellite constellation is pivotal for the future of satellite Internet and 6G networks. In the mega-LEO satellite constellation system (MLSCS), which is the spatial distribution of satellites, global users, and their services, along with the utilization of global spectrum resources, significantly impacts resource ...
Gou L, Bian D, Nie Y, Zhang G, Zhou H, Shi Y, Zhang L.   +6 more
europepmc   +4 more sources

Characterization of Mega-Constellation Links for LEO Missions With Applications to EO and ISS Use Cases

IEEE Access, 2023
Satellite missions demand ever greater connectivity, especially in the LEO regime. In this paper, we introduce the new mega-constellation services in space paradigm: we show that mega-constellations, deployed to offer innovative services to Earth’ ...
Gabriel Maiolini Capez, Mauricio A. Caceres, Roberto Armellin, Chris P. Bridges, Stefan Frey, Roberto Garello, Pier Bargellini   +6 more
doaj   +1 more source

LEO Mega Constellations: Review of Development, Impact, Surveillance, and Governance

Space: Science & Technology, 2022
The rapid development of Low Earth Orbit (LEO) mega constellations has significantly contributed to several aspects of human scientific progress, such as communication, navigation, and remote sensing.
Jingrui Zhang, Yifan Cai, Chenbao Xue, Zhirun Xue, Han Cai   +4 more
doaj   +1 more source

Impacts of Orbital and Constellation Parameters on the Number and Spatiotemporal Coverage of LEO-LEO Occultation Events

Remote Sensing, 2021
The development of small-satellite technologies allows the low Earth orbit intersatellite link (LEO-LEO) occultation method to observe the Earth’s atmosphere with global coverage and acceptable costs using electromagnetic signals, in which the L/X/K/M ...
Congliang Liu, Gottfried Kirchengast, Yueqiang Sun, Veronika Proschek, Xin Wang, Longfei Tian, Qifei Du, Weihua Bai, Chunjun Wu, Peng Hu, Guangyuan Tan   +10 more
doaj   +1 more source

An analysis of close approaches and probability of collisions between LEO resident space objects and mega constellations

Geo-spatial Information Science, 2022
With the undergoing and planned implementations of mega constellations of thousands of Low Earth Orbiting (LEO) satellites, space will become even more congested for satellite operations.
Yan Zhang, Bin Li, Hongkang Liu, Jizhang Sang   +3 more
doaj   +1 more source

Design optimisation of low earth orbit constellation based on BeiDou Satellite Navigation System precise point positioning

IET Radar, Sonar & Navigation, 2022
The use of low earth orbit (LEO) satellites to enhance the performance of global navigation satellite system navigation and positioning services has become a popular research topic.
Jing Liu, Jinming Hao, Yan Yang, Zheyu Xu, Weiping Liu, Renzhe Wu   +5 more
doaj   +1 more source

Satellite-enabled LTE systems in LEO constellations [PDF]

2017 IEEE International Conference on Communications Workshops (ICC Workshops), 2017
LTE-based satellite systems in LEO constellations are a promising solution for extending broadband coverage to areas not connected to a terrestrial infrastructure. However, the large delays and Doppler shifts over the satellite channel pose severe technical challenges to a traditional LTE system.
GUIDOTTI, ALESSANDRO, VANELLI CORALLI, ALESSANDRO, Caus, M., Bas, J., Colavolpe, G., Foggi, T., Cioni, S., Modenini, A., TARCHI, DANIELE   +8 more
openaire   +3 more sources

LTE‐based satellite communications in LEO mega‐constellations [PDF]

International Journal of Satellite Communications and Networking, 2018
SummaryThe integration of satellite and terrestrial networks is a promising solution for extending broadband coverage to areas not connected to a terrestrial infrastructure, as also demonstrated by recent commercial and standardisation endeavours. However, the large delays and Doppler shifts over the satellite channel pose severe technical challenges ...
Guidotti, Alessandro, Vanelli-Coralli, Alessandro, Foggi, Tommaso, COLAVOLPE, GIULIO, Caus, Márius, Bas, Joan, Cioni, Stefano, Modenini, Andrea   +7 more
openaire   +4 more sources

GaliLEO: A Simulation Tool for LEO Satellite Constellations [PDF]

SIMULATION, 2002
The authors present GaliLEO, a simulator for the transmission of connection-oriented traffic over a constellation of LEO/MEO (low/medium earth orbit) satellites. Its scope is limited to the satellites and the stations accessing them, without any modelling of the terrestrial network, but inside this scope the goal is to study the performance of ...
Potorti' F., Franck L.
openaire   +5 more sources