CHAPTER 1
INTRODUCTION

Communication links between space crafts is an important element of space infrastructure, particularly where such links allow a major reduction in the number of earth stations needed to service the system. An example of an inter orbit page link for relaying data from LEO space craft to ground is shown in the figure below



Interorbit page link for relating data from LEO spacecraft to ground

Fig. 1
Inter orbit page link for relaying data from LEO space craft to ground.


The above figure represents a ....etc

[:=Read Full Message Here=:]

need help how to present seminar for the project 'Continuous Delivery Message Dissemination (CDMD) Problems under the Multicasting Communication Mode' ....etc

[:=Read Full Message Here=:]

ABSTRACT
The search for a new, safe and stable renewable energy source led to the idea of building a power station in space which transmits electricity to Earth. The concept of Solar Power Satellites (SPS) was invented by Glaser in 1968.Research is still going on in this field and NASA is planning to implement one by 2040. SPS converts solar energy into microwaves and transmit it to a receiving antenna on Earth for conversion to electric power. The key technology needed to enable the future feasibility of SPS is Microwave P ....etc

[:=Read Full Message Here=:]

please help me in getting a ppt for analog digital hybrid modulation for improved efficiency over broadband wireless communcation ....etc

[:=Read Full Message Here=:]

INTRODUCTION
A major problem facing Planet Earth is provision of an adequate supply of clean energy. It has been that we face ...three simultaneous challenges -- population growth, resource consumption, and environmental degradation -- all converging particularly in the matter of sustainable energy supply. It is widely agreed that our current energy practices will not provide for all the world's peoples in an adequate way and still leave our Earth with a livable environment. Hence, a major task for the new century will be to dev ....etc

[:=Read Full Message Here=:]

ABSTRACT
Satellites are one of the greatest achievements of mankind. They have been used for various applications like communication, military application, weather forecasting and so on. They play a big role in the case of television channels and other entertainment networks. One of the latest applications of satellites is the satellite radio.

Satellite radio is a subscriber based radio service that broadcast directly from satellites. It is an advanced form of mobile radio service where one can rec ....etc

[:=Read Full Message Here=:]

Mobile Satellite Communication

Mobile Satellite system
Constellation Characteristics and Orbital parameters
Radio Link Design
Communicators
System Architecture


Satellite Location w.r.t. Orbital Plane System
Satellite Constellation
For constellation design
High elevation angle.
Low propagation delay.
Low battery consumption.
Inter- and intra- orbital interference in the proper
limit.
The no. of satellite being visible at any time within
a coverage area.


Network Proce ....etc

[:=Read Full Message Here=:]

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

[:=Read Full Message Here=:]

ABSTRACT
Satellite crosslinks generally require narrower bandwidths for
increased power concentration. We can increase the power concentration
by increasing the cross page link frequency with the same size antenna. But
the source technology and the modulation hardware required at these
higher frequency bands are still in the development stage. Use of
optical frequencies will help to overcome this problem with the
availability of feasible light sources and the existence of ....etc

[:=Read Full Message Here=:]

ABSTRACT
A satellite is any object that orbits another object. In popular usage, the term 'satellite' normally refers to an artificial satellite.
A planet, or any other body, which finds itself at any distance from the sun with no sideways velocity will quickly fall without missing the sun. Only our sideways motion saves us. The planet, which is at a larger distance, requires longer falling to where it would strike the sun. As a result, it takes a lon ....etc

[:=Read Full Message Here=:]