Results 261 to 270 of about 5,413 (290)
Some of the next articles are maybe not open access.

Satellite laser communication with Brandon orbits

2011 International Conference on Space Optical Systems and Applications (ICSOS), 2011
We estimate worldwide zenith attenuation for 10 micron laser satellite communication systems. The attenuation may be lowered with the aid of switched ground diversity. However, real satellite systems tend to sharply raise the attenuation with low elevation angles and long atmospheric path lengths. Brandon Molniya satellite concepts are expected to give
openaire   +1 more source

Laser Satellite Communication Systems

2009
Overview: In this chapter we consider statistical quantities introduced in Chaps. 6-€“9 and adapt them to vertical and slant path propagation links. Most of the analysis presented here is for a slant path connecting a satellite in geostationary orbit and a ground or airborne platform.
openaire   +1 more source

Laser satellite communications: current status and directions

Space Policy, 1997
Abstract This summary paper outlines the advantages of laser satellite communications (laser satcom) and summarizes the status of relevant programs. It concludes that laser satcom systems offer valuable performance capabilities and system advantages.
Geoffrey Hyde, Burton I. Edelson
openaire   +1 more source

Climate Satellites with Laser Communication Links

28th AIAA International Communications Satellite Systems Conference (ICSSC-2010), 2010
Low cost, high data rate laser Earth Observation Satellites will be valuable for monitoring global warming. A global warming model is described functionally: it indicates considerable warming at Northern Latitudes. We use a cloud attenuation model derived from key Italsat results to find laser cloud attenuation for satellite-ground links.
openaire   +1 more source

Free space satellite laser communication

2000 Digest of the LEOS Summer Topical Meetings. Electronic-Enhanced Optics. Optical Sensing in Semiconductor Manufacturing. Electro-Optics in Space. Broadband Optical Networks (Cat. No.00TH8497), 2002
I present applications of satellite laser communications. Free space optical communication between satellites networked together can make possible high speed communication between different places on the Earth. The advantages of an optical communication system instead of a microwave communication system in free space are: 1) smaller size and weight, 2)
openaire   +1 more source

Design and analysis of the satellite laser communications network

SPIE Proceedings, 2015
A satellite laser communications network structure with two layers and multiple domains has been proposed, which performance has been simulated by OPENT. To simulation, we design several OPNET models of the network’s components based on a satellite constellation with two layers and multiple domains, as network model, node model, MAC layer protocol and ...
Pei-an Ren   +3 more
openaire   +1 more source

M diversity for reliable laser satellite communication

Free-Space Laser Communications XXXIII, 2021
Infrared satellite links are examined to measure earth surface temperatures. The low earth orbits would offer low cost and Brandon orbits would offer the convenience of stationary ground antennas. A square array of ground stations is considered (‘Quad Diversity’) to relieve laser attenuation, and higher order diversity is considered.
openaire   +1 more source

Research on Scanning Method in Satellite Laser Communication

2019 18th International Conference on Optical Communications and Networks (ICOCN), 2019
Satellite laser communication has high operating frequency and strong direction. It has the advantages of high transmission code rate, small antenna size and strong confidentiality. It is more suitable for high speed and large capacity communication in space.
Shiyu Qi   +10 more
openaire   +1 more source

Optical antenna in laser inter-satellite communication

SPIE Proceedings, 2005
In the modern world of telecommunications, the concept of wireless global coverage is of the utmost importance. However, real global coverage can only be achieved by satellite systems. Satellites communication is the most important mean of the communication network.
Chuanhua Wen, Chunxia Wang, Yuquan Li
openaire   +1 more source

The Laser Communication and Aiming Antenna Research for Micro-nano Satellite

2019 IEEE/CIC International Conference on Communications Workshops in China (ICCC Workshops), 2019
With the rapid development of space technology, the use of low-orbit micro-nano satellite platform to build communication network has become a hot spot in the future development. Laser communication has the outstanding advantages of large communication capacity, light weight, low power consumption, small size and good confidentiality. In order to solve
Yiqun Zhang, Lizhong Zhang, Lixin Meng
openaire   +1 more source

Home - About - Disclaimer - Privacy