Results 231 to 240 of about 9,572,770 (273)

Low Earth orbit satellite technology for PCS

MILCOM 92 Conference Record, 2003
The authors examine today's major issues in terrestrial personal communication systems (PCS) and show the emerging technologies necessary for global PCS. It is suggested that, with the development of existing technologies and the spectrum allocations, the Iridium system of low Earth orbit satellites will revolutionize PCS to make telecommunications a ...
P.N. Cloutier, P.A. Swan
openaire   +1 more source

Aerodynamics of Satellites on a Super Low Earth Orbit

AIP Conference Proceedings, 2008
The Super Low Altitude Test Satellite is an engineering test satellite currently under development in Japan Aerospace Exploration Agency in an attempt to open a new frontier of space utilization on extremely low earth orbits. In the presence of aerodynamic forces acting on the satellite, the altitude and attitude of the satellite are maintained by ion ...
Kazuhisa Fujita, Atsushi Noda, Takashi Abe   +2 more
openaire   +1 more source

Low Earth Orbit (LEO) Satellites

SSRN Electronic Journal
Low-earth orbit (LEO) satellites are said to be the technology to revolutionize the internet. With more than a third of the world still offline, this satellite constellation can help connect the unconnected and bridge the digital divide that's leaving remote and rural communities behind. Low-earth orbit (LEO) satellites can help connect the unconnected
openaire   +1 more source

Low earth orbit satellite systems for communications

International Journal of Satellite Communications, 1991
AbstractIt may be that we are now entering the era of LEO constellation satellite communications after thirty years of domination by the GEO systems. This paper heralds the coming of the new era with a tutorial approach to the system design and trade‐offs of LEO constellation system design.
Gérard Maral, Jean‐Jacques de Ridder, Barry G. Evans, Madhavendra Richharia   +3 more
openaire   +1 more source

Low Earth orbit communications satellite

1992
A current thrust in satellite communication systems considers a low-Earth orbiting constellations of satellites for continuous global coverage. Conceptual design studies have been done at the time of this design project by LORAL Aerospace Corporation under the program name GLOBALSTAR and by Motorola under their IRIDIUM program.
Moroney, D., Lashbrook, D., Mckibben, B., Gardener, N., Rivers, T., Nottingham, G., Golden, B., Barfield, B., Bruening, J., Wood, D.   +9 more
openaire   +1 more source

Low Earth-orbit satellite attitude stabilization with fractional regulators

International Journal of Systems Science, 2004
Fractional Order Control methods were applied to a three-axis reaction wheels satellite attitude control system. To show the advantages of this method, a comparative study between a Linear Quadratic Regulator and a Fractional Order Control was established through two principal fractional control laws.
A. Kailil, N. Mrani, M. Mliha Touati, S. Choukri, N. Elalami   +4 more
openaire   +1 more source

A global message network employing low Earth-orbiting satellites

IEEE Journal on Selected Areas in Communications, 1992
A global message communication network for low-density traffic, using satellites at low altitudes, is described. This network affords around-the-clock service to any part of the globe, including the polar regions. Such a network can accommodate static and mobile user terminals simultaneously.
Jaidev Kaniyil, Jun Takei, Shigeru Shimamoto, Yoshikuni Onozato, Tomonori Usui, Ikuo Oka, Tsutomu Kawabata   +6 more
openaire   +1 more source

An Overview Of Low Earth Orbit Satellite Routing Algorithms

2023 International Wireless Communications and Mobile Computing (IWCMC), 2023
Chengcheng Li, Yasheng Zhang, Zixuan Cui, Yi Zhang, Jiamin Liu, Zilong Yu, Peiying Zhang   +6 more
openaire   +1 more source

Ground Station for Low Earth Orbit Satellites

2022
Ground stations are essential for satellite operations as they are used to send commands to satellites, receive the satellite telemetry information and payload data. We constructed a ground station for UHF and VHF band two-way communication with low Earth orbit satellites and prepared for installation an X-band downlink ground station.
openaire   +1 more source

Global Governance of Low Earth Orbit Satellites

This volume brings together international experts to address the policy, legal, and technological dimensions of governing Low Earth Orbit (LEO) satellite broadband infrastructure. Global Governance of Low Earth Orbit Satellites is grounded in a multi-year, interdisciplinary research project generously supported by the Internet Society Foundation as ...
Dan York, Jonathan Liebenau, Roy Balleste, Laetitia Cesari, Célestine R. Rabouam, Monika Stachoń, Jason Bonsall, Mallory Knodel   +7 more
openaire   +2 more sources