22-03-2012, 11:55 AM
GLOBAL MOBILE SATELLITE SYSTEM COMMUNICATION
05_Global_Mobile_Satellite.PPT (Size: 2.19 MB / Downloads: 52)
INTRODUCTION
ADVANCEMENT IN WIRELESS TECHNOLOGY
NO MORE GEOGRAPHICAL ISOLATION
EXTENSION IN EXISTING NETWORK
GLOBAL COMMUNICATION
FIRST MOBILE COMMUNICATION SYSTEM
IN 1976 MARISAT SATELLITE WAS LAUNCHED
COMMUNICATION BETWEEN SHORE AND SHIPS
FIRST IRIDIUM SYSTEM IN 1997 IN LOW EARTH ORBIT
GEOSTATIONARY SATELLITE
CIRCULAR ORBIT
ALTITUDE 36000KM
3-4 SATELLITES ARE ENOUGH TO COVER THE EARTH
THEY CAN SEE UPTO 42000KM
SATELLITE VISIBILITY 24 HOUR
SATELLITE LIFE 20-30 YEARS
SATELLITE CONSTELLATION COST LOW
2.MEDIUM EARTH ORBIT (MEO)
ALTITUDE 10000KM-20000KM
ORBITAL PERIOD 6-12 HOUR
10-15 SATELLITES REQUIRED
SATELLITE VISIBILITY 2-4 HRS
PROPAGATION DELAY LESS
SET-UP COST IS MEDIUM
05_Global_Mobile_Satellite.PPT (Size: 2.19 MB / Downloads: 52)
INTRODUCTION
ADVANCEMENT IN WIRELESS TECHNOLOGY
NO MORE GEOGRAPHICAL ISOLATION
EXTENSION IN EXISTING NETWORK
GLOBAL COMMUNICATION
FIRST MOBILE COMMUNICATION SYSTEM
IN 1976 MARISAT SATELLITE WAS LAUNCHED
COMMUNICATION BETWEEN SHORE AND SHIPS
FIRST IRIDIUM SYSTEM IN 1997 IN LOW EARTH ORBIT
GEOSTATIONARY SATELLITE
CIRCULAR ORBIT
ALTITUDE 36000KM
3-4 SATELLITES ARE ENOUGH TO COVER THE EARTH
THEY CAN SEE UPTO 42000KM
SATELLITE VISIBILITY 24 HOUR
SATELLITE LIFE 20-30 YEARS
SATELLITE CONSTELLATION COST LOW
2.MEDIUM EARTH ORBIT (MEO)
ALTITUDE 10000KM-20000KM
ORBITAL PERIOD 6-12 HOUR
10-15 SATELLITES REQUIRED
SATELLITE VISIBILITY 2-4 HRS
PROPAGATION DELAY LESS
SET-UP COST IS MEDIUM