This note is about Satellite system.

1. Notes On
‘Satellite’
Submitted to
Pranab Bandhu Nath
Senior Lecturer
Dept. Of CSE
City University
Submitted by
Md. Mizanur Rahman
1834902576
49th

2. What is Satellite?
A satellite is an object that has been intentionally placed into orbit for many
purposes like, weather forecasting, searching and rescuing , scientific research etc
History Of Satellite:
Year Description
1945 Arthur C. Clarke publishes an essay titled "Extra Terrestrial Relays"
1957 First satellite, SPUTNIK
1960 First Reflecting communication satellite, ECHO
1963 First Geostationary satellite, SYNCOM
1965 First Commercial geostationary satellite, "Early Bird"
1976 Three MARISAT satellites for maritime communication.
1982 First mobile satellite telephone system, INMARSAT - A
1988 First satellite system for mobile phones and data communication, INMARSAT -
C
1993 First digital satellite telephone system
1998 Global satellite systems for small mobile phones.
Characteristics of Satellite Systems:
 Satellite have been launched for various reasons and are placed in different
height.
 Satellite Provides connections between the Earth-based base station and the
satellites.

3.  A satellite typically has a large footprint, which can be up to 34% of the
earth's surface covered, and therefore it is difficult to reuse frequencies.
 The global coverage of small mobile phones and data transmission typically
cause high latency in the range of about 275 ms.
 LEO satellite are divided into little and big satellites.
 The latency is around 5 to 10 ms, and the satellite is visible for about 10 to
40 ms.
 Several satellites are needed to ensure global coverage. The same frequency
spectrum is also used by MEO and GEO.
 Specialized antennas are used to provide smaller footprints and higher
transmitting power
 Source- Javapoint
Applications Of Satellites:
 Weather Forecasting
 Radio and TV broadcast satellites
 Military uses
 Satellites for Navigation
 Global mobile Communication etc
Types Of Satellite:
GEO: 36,000km above earth’s surface
MEO: 6,000-20,000km above earth’s surface
HEO: Highly elliptical orbit
LEO: 500-1500km above earth’s surface

4. Reference:
www.rfwireless-world.com
www.swiftutors.com
www.javapoint.com
www.eveerythingrf.com