Definition

The European Space Agency (ESA) has programmes underway to place Satellites carrying optical terminals in GEO orbit within the next decade. The first is the ARTEMIS technology demonstration satellite which carries both microwave and SILEX (Semiconductor Laser Intro satellite Link Experiment) optical interorbit communications terminal. SILEX employs direct detection and GaAIAs diode laser technology; the optical antenna is a 25cm diameter reflecting telescope.

The SILEX GEO terminal is capable of receiving data modulated on to ....etc

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Presented by:
CH.RAGHAVENI
S.GHOUSIA SULTANA


ABSTRACT: -
Earthquakes and Tsunamis strike without warning. The resulting damage can be minimized and lives can be saved if the people living in the earth quake-prone area are already prepared to survive the strike. This requires a warning before the strong ground motion from the earthquake arrives. Such a warning system is possible because the energy wave released at the epicenter travels slower (at 3.5 to 8km/s) than light, which is the principle beh ....etc

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Abstract
LEO is Low Earth Orbit satellite.It circulates on a lower orbit in a shorter period . Additionally LEO systems try to ensure a high elevation for every spot of the earth to provide a highquality communication page link . The networks will play an important role in the evolving information infrastructure . It provides communication with shorter endto- end delays and e_ciency frequency usages . Some problems need to be solved before LEO satellite system can be successfully deployed . One of these problems is handover management . Even ....etc

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Satellite systems are ideally suited for television and radio distribution, providing high-quality, high-reliability, low-maintenance, flexible alternatives to terrestrial systems. Unlike terrestrial microwave systems, there are no towers or repeaters to maintain, no radio fades to degrade performance, no extensive troubleshooting to diagnose problems and far less land to lease. Your capital investment for a satellite network is also much lower, especially in areas with difficult terrain. Receive stations can be deployed in a fraction of the ti ....etc

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ABSTRACT: -
The credential part of the paper lies in the applications part where the application (forthcoming) of ISS as an alert system for EARTHQUAKE and TSUNAMI like natural disasters with which the casualties can be reduced drastically.
Iridium is a satellite based wireless personal communications network designed to permit a wide range of mobile telephone services including voice, data, networking, facsimile, geo location, fax capabilities and paging. The Iridium network is unique in that it covers the whole earth, inc ....etc

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Solar power satellite
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It has been suggested that this article or section be merged with Space solar power . (Discuss)
An artist's depiction of a solar satellite, which could send energy wirelessly to a space vessel or planetary surface.
An artist's depiction of a solar satellite, which could send energy wirelessly to a space vessel or planetary surface.

A solar power satellite, or SPS or Powersat, as originally proposed would be a satellite built in high Earth orbit that uses microwave power transmission to beam solar po ....etc

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