Results 71 to 80 of about 869,960 (293)
DIRECT OPTICAL HIGH SPEED DOWNLINKS AND GROUND STATION NETWORKS FOR SMALL LEO MISSIONS [PDF]
, 2010 Direct microwave data downlink capacity of today’s earth observation satellites is limited in terms of available spectrum, transmission data rate, and power consumption.
Giggenbach, Dirk +3 more
core
Transparent Perovskite Light‐Emitting Diodes with Conductive Oxide Top Electrodes
Advanced Materials, EarlyView.Transparent perovskite light‐emitting diodes (TrPeLEDs) enable simultaneous display and transparency, expanding application possibilities. Using a metal oxide buffer layer and pulsed laser deposition, TrPeLEDs with diverse compositions and architectures are demonstrated.
Michele Forzatti +11 more
wiley +1 more source
An Integrity Monitoring Method for Navigation Satellites Based on Multi-Source Observation Links
Remote SensingThe BeiDou-3 navigation satellite system (BDS-3) has officially provided positioning, navigation, and timing (PNT) services to global users since 31 July 2020.
Jie Xin, Dongxia Wang, Kai Li
doaj +1 more source
Gravity gradient effect on a LEO satellite with an elliptic orbit and unsymmetrical mass properties
, 2005 Corresponding Author: Mechanical Engineering Department, College of Engineering, King Saud University, P.O. Box 800 Riyadh-11421, Saudi Arabia Telehone: +966-1-4676659 Email: alsaif@ksu.edu.saThe study presented in this paper investigates the dynamic ...
K. Al-Dakkan +3 more
core +1 more source
Leaftronics: Bio‐Fractal Scaffolds From Leaf Venation for Low‐Waste Electronics
Advanced Materials, EarlyView.“Leaftronics” transforms naturally evolved leaf venation into quasi‐fractal scaffolds for sustainable electronics. Polymer‐infiltrated leaf skeletons can be used to fabricate ultra‐smooth, reflow‐ and thin‐film‐compatible decomposable substrates, while making the same lignocellulose networks conducting results in flexible transparent electrodes.
Rakesh Rajendran Nair +3 more
wiley +1 more source
The Role of Regulatory Frameworks in Balancing Between National Security and Competition in LEO Satellite Market [PDF]
The low Earth orbit (LEO) satellite market is booming, and the expectations for an efficient regulatory system are rising. Governments seek to keep regula-tory improvements at the same pace as innovations.
Georgiades, Eugenia, Pedram, Matin
core +1 more source
Energy Efficient LoRaWAN in LEO Satellites
CoRRLPWAN service's inexpensive cost and long range capabilities make it a promising addition and countless satellite companies have started taking advantage of this technology to connect IoT users across the globe. However, LEO satellites have the unique challenge of using rechargeable batteries and green solar energy to power their components.
Muskan Shergill +3 more
openaire +3 more sources
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.
Alessandro Guidotti +8 more
openaire +7 more sources
Advanced Materials, EarlyView.A giant insulator to metal transition and emergent superparamagnetism are revealed by nanoparticle exsolution in non‐stoichiometric titanate perovskite thin films. By combining transport, synchrotron spectroscopy, and first‐principles calculations, this work reveals how defect reconfiguration and lattice reconstruction fundamentally reshape electronic ...
Sungil Kim +11 more
wiley +1 more source
Satellite surface charging in LEO with ProPIC
ProPIC is a fully kinetic particle-in-cell (PIC) solver developed for space electric propulsion. This work has extended its capabilities to simulate satellite surface charging and wake generation in low Earth orbit (LEO).
Magarotto, Mirko +7 more
core +1 more source