Results 21 to 30 of about 211,018 (292)

Precise orbit determination for a large LEO constellation with inter-satellite links and the measurements from different ground networks: a simulation study

open access: yesSatellite Navigation, 2022
Geodetic applications of Low Earth Orbit (LEO) satellites requires accurate satellite orbits. Instead of using onboard Global Navigation Satellite System observations, this contribution treats the LEO satellite constellation independently, using Inter ...
Xingchi He   +4 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

Test Method for Single Satellite’s Inter-Satellite Link Pointing and Tracking via Ground Station

open access: yesAerospace
An inter-satellite link is a key technology that improves control accuracy, transmission efficiency, and autonomous capability of constellations. A satellite’s pointing and tracking abilities mainly determine the inter-satellite link’s performance, which
Zhenqiang Hong   +5 more
doaj   +1 more source

Optimization of intersatellite routing for real-time data download [PDF]

open access: yes, 2018
The objective of this study is to develop a strategy to maximise the available bandwidth to Earth of a satellite constellation through inter-satellite links.
Ceriotti, Matteo, Yarr, Neil
core   +1 more source

Performance of Angle of Arrival Detection Using MUSIC Algorithm in Inter-Satellite Link

open access: yes, 2018
An attitude of satellite is not always static, sometimes it moves randomly and the antenna pointing of satellite is harder to achieve line of sight communication to other satellite when it is outage by tumbling effect.
Muhammad, Cahya Budi   +2 more
core   +1 more source

A cross-layer approach to enhance QoS for multimedia applications over satellite [PDF]

open access: yes, 2009
The need for on-demand QoS support for communications over satellite is of primary importance for distributed multimedia applications. This is particularly true for the return link which is often a bottleneck due to the large set of end-users accessing a
Chassot, Christophe   +4 more
core   +1 more source

Inter-Satellite Communication System based on Visible Light

open access: yes, 2018
Future space missions will be driven by factors such as the need for reduced cost of spacecraft without diminished performance, new services and capabilities including reconfigurability, autonomous operations, target observation with improved resolution ...
Afghah, Fatemeh   +2 more
core   +1 more source

Research on design of permanent inter-satellite-links in satellite networks

open access: yesTongxin xuebao, 2006
Based on constellation designation,conditions of permanent inter-satellite-links were analyzed in order to solve problems of continual handoff caused by relative movements of satellites in different orbits in satellite networks.A scheme to design ...
WANG Zhen-yong   +3 more
doaj   +2 more sources

Internet of Satellites (IoSat): Analysis of Network Models and Routing Protocol Requirements

open access: yesIEEE Access, 2018
The space segment has been evolved from monolithic to distributed satellite systems. One of these distributed systems is called the federated satellite system (FSS) which aims at establishing a win-win collaboration between satellites to improve their ...
Joan A. Ruiz de Azua   +2 more
doaj   +1 more source

Disordered but rhythmic—the role of intrinsic protein disorder in eukaryotic circadian timing

open access: yesFEBS Letters, EarlyView.
Unstructured domains known as intrinsically disordered regions (IDRs) are present in nearly every part of the eukaryotic core circadian oscillator. IDRs enable many diverse inter‐ and intramolecular interactions that support clock function. IDR conformations are highly tunable by post‐translational modifications and environmental conditions, which ...
Emery T. Usher, Jacqueline F. Pelham
wiley   +1 more source

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