Results 21 to 30 of about 56,614 (262)

Design of Mega-Constellations for Global Uniform Coverage with Inter-Satellite Links

open access: yesAerospace, 2022
Constellation configuration design is a prerequisite and critical step in the construction of a mega-constellation system in low Earth orbit. However, the huge number of satellites and the intricate changes in relative positions among them make the ...
Lu Jia   +3 more
doaj   +1 more source

Traffic simulation of broadband LEO constellation satellite communication system

open access: yesDianzi Jishu Yingyong, 2019
Due to the rapid development of small satellite technology,and the advantages of low earth orbit satellite(LEO) with low delay and low propagation loss as compared with the traditional geosynchronous orbit satellite(GEO), the broadband LEO constellation ...
Xu Jun, Lu Wei, Zhang Gengxin
doaj   +1 more source

Study on remote sensing satellites random access to internet constellation and on-orbit intelligent processing

open access: yesDianxin kexue, 2022
The low earth orbit (LEO) satellite Internet constellation is a hot spot in current global research.And it is highly anticipated that the LEO satellite Internet constellation supports random access to remote sensing satellites and direct on-orbit ...
Xiaoyu CHANG   +5 more
doaj   +2 more sources

Optimization of Reconfigurable Satellite Constellations Using Simulated Annealing and Genetic Algorithm [PDF]

open access: yes, 2019
Agile Earth observation can be achieved with responsiveness in satellite launches, sensor pointing, or orbit reconfiguration. This study presents a framework for designing reconfigurable satellite constellations capable of both regular Earth observation ...
De Weck, Olivier L   +2 more
core   +1 more source

LEO Satellite Constellation for Internet of Things

open access: yesIEEE Access, 2017
Internet of Things (IoT) is one of the evolutionary directions of the Internet. This paper focuses on the low earth orbit (LEO) satellite constellation-based IoT services for their irreplaceable functions.
Zhicheng Qu   +3 more
doaj   +1 more source

A DTN routing scheme for quasi-deterministic networks with application to LEO satellites topology [PDF]

open access: yes, 2012
We propose a novel DTN routing algorithm, called DQN, specifically designed for quasi-deterministic networks with an application to satellite constellations.
Baudoin, Cédric   +5 more
core   +3 more sources

Nearest Neighbor and Contact Distance Distribution for Binomial Point Process on Spherical Surfaces [PDF]

open access: yes, 2020
This letter characterizes the statistics of the contact distance and the nearest neighbor (NN) distance for binomial point processes (BPP) spatially-distributed on spherical surfaces.
Alouini, Mohamed-Slim   +2 more
core   +2 more sources

Application Status and Analysis of Starlink Constellation

open access: yes天地一体化信息网络, 2023
Starlink, asatellite broadband constellation operated by SpaceX, is currently the most influential and promising LEO broadband satellite constellation.With the expansion of the constellation deployment, its high-frequency launch and batch deployment of ...
Yu WANG   +6 more
doaj   +2 more sources

Helmert Variance Component Estimation for Multi-GNSS Relative Positioning [PDF]

open access: yes, 2020
The Multi-constellation Global Navigation Satellite System (Multi-GNSS) has become the standard implementation of high accuracy positioning and navigation applications.
Fang, Zhenlong   +5 more
core   +2 more sources

A Web-Based Prototype System for Deforestation Detection on High-Resolution Remote Sensing Imagery With Deep Learning

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Forests are the largest carbon storage and carbon sinks on land and are closely related to global climate change. Using remote sensing images to monitor global deforestation has become the mainstream method, mainly because of their long time-series ...
Zhipan Wang   +6 more
doaj   +1 more source

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