Results 41 to 50 of about 10,018,306 (276)

Angles-only Navigation to a Non-Cooperative Satellite using Relative Orbital Elements [PDF]

, 2012
This work addresses the design and implementation of a prototype relative navigation tool that uses camera-based measurements collected by a servicer spacecraft to perform far- range rendezvous with a non-cooperative client in low Earth orbit.
S. D'amico, Ardaens, J.-S., Gaias, Gabriella, J-S Ardaens, D'Amico, Simone, G. Gaias, D'Amico S., Ardaens J. -S., Gaias G.   +8 more
core   +1 more source

Review of the Development of Low Earth Orbit Satellite Communication for Smart High-Speed Railway

天地一体化信息网络, 2023
Low-earth orbit satellites have the advantages of wide bandwidth, low latency, and large coverage, making them very suitable as a supplement to ground cellular networks.Low-earth orbit satellites can meet the requirements of smart high-speed railway full
Zhaoyang SU, Liu LIU, Jiachi ZHANG, Tao ZHOU, Wei LIN, Yiqun LIANG   +5 more
doaj   +2 more sources

Routing optimization based on topology control in satellite network

Tongxin xuebao, 2018
A new double-layer satellite network model for space networking was established and a routing algorithm based on topology control (TCRA) was proposed considering the advantages of low earth orbit and stationary earth orbit satellite networks.This model ...
Xiaogang QI, Jiulong MA, Lifang LIU
doaj   +2 more sources

Joint optimization based satellite handover strategy for low earth orbit satellite networks

IET Communications, 2021
Low earth orbit constellation satellite communication has the characteristics of low propagation delay, low path loss, low launch cost and wide range of applications.
Yifei Liu, Lang Feng, Liang Wu, Zaichen Zhang, Jian Dang, Bingcheng Zhu, Lei Wang   +6 more
doaj   +1 more source

Orbit Propagation and Determination of Low Earth Orbit Satellites [PDF]

International Journal of Antennas and Propagation, 2014
This paper represents orbit propagation and determination of low Earth orbit (LEO) satellites. Satellite global positioning system (GPS) configured receiver provides position and velocity measures by navigating filter to get the coordinates of the orbit propagation (OP).
openaire   +2 more sources

Rethinking Indonesia’s future at low earth orbit [PDF]

, 2022
Outer space activities that were originally carried out during the Cold War era for ideological purposes have now turned into a competition for commercial benefits.
Putro, Yaries Mahardika, Nugraha, Ridha Aditya   +1 more
core   +2 more sources

Chiral separation of chloroalkanes with the chromatographic column onboard Martian rovers

FEBS Letters, EarlyView.
Computer image of the Rosalind Franklin Rover of ESA's ExoMars mission. ExoMars is scheduled to land on planet Mars in Oxia Planum in 2029. This area represents an interesting spot to look for biosignatures. Investigations of ExoMars include measurement on molecular chirality. We show that chiral chloroalkanes, that have been identified on Mars, can be
Asma Merzougui, Agnes Banreti, Armelle L. Ernst, Guillaume Leseigneur, Uwe J. Meierhenrich   +4 more
wiley   +1 more source

In vitro and in silico modelling of ROS1‐positive non‐small cell lung cancer reveals fusion‐dependent tyrosine kinase inhibitor responses

Molecular Oncology, EarlyView.
Drug resistance limits treatment success in a subset of lung cancers driven by ROS1 gene alterations. Using patient‐derived cells and computer simulations, we studied three key mutations and how they affect five targeted drugs. The mutations reduced drug effectiveness in different ways by altering protein structure and behavior.
Farhan Ul Haq, Marc Terrones, Felicia Rodrigues Fortes, Anne Schepers, Alessia Denis, Christophe Deben, Ken Op de Beeck, Guy Van Camp, Geert Vandeweyer   +8 more
wiley   +1 more source

Joint Power Allocation and User Association in CR-Inspired D-RSMA for LEO Satellite Networks With GEO Spectrum Sharing

IEEE Access
With the rapid development of satellite communications, low Earth orbit satellite networks have attracted considerable attention because of their high data delivery capability and low propagation delay.
Xianpeng Wang, Xi Han, Mingqi Gao, Zeke Wu, Rong Xu, Mengchen Zhang, Jianmei Dai   +6 more
doaj   +1 more source

Recent insights into the molecular mechanism of ubiquinol oxidation by cytochrome bc1

FEBS Open Bio, EarlyView.
The review reflects on the mechanism of the catalytic reaction in cytochrome bc1: the electron bifurcation that involves the separation of two electrons derived from the quinol oxidation to opposite sides of the enzyme across the membrane. This review summarizes the long‐standing effort to understand the mechanism of quinol oxidation catalyzed by ...
Anna Wójcik‐Augustyn, Artur Osyczka, Marcin Sarewicz   +2 more
wiley   +1 more source