Top Articles:

How Satellite Communication works? - Satellite Communication


Post by Jawad Ahmad Riaz

The concept of satellite based networks is to transmit and receive signals from ground stations. The purpose of satellite communication is to use it for video transmission and sharing. In simple words a satellite is a device which revolves around the earth either for collecting useful information or for helping transfer of information.

 

Types of Satellites

There are many types of satellites based on the working of these space units. The most popular satellites may include geostationary orbits, low earth orbiting satellites and molniya satellites. The geo stationary satellite works on a very simple principle though still it is very efficient. It rotates around the earth in at a constant speed everyday. It is the most suitable design for communication applications. The antennas which are working at the ground have to be aligned with the direction of the satellite and hence they work accordingly. There is no need for extra expensive equipment to be deployed with these types of satellites. Low earth orbiting satellites or most commonly known as LEO is a circular trajectory which is placed at a distance of about 400Km above earth. These satellites can be used to establish satellite phone connections. Molniya satellites are considered to operate below the equator. These satellites are often used to provide telephonic communication and TV broadcasting.


The Communication of the Satellite
The telemetry, tracking and command system usually monitors the working of the satellite system. These systems help to direct and locate signals from the satellite and ground station. Or in other words these systems help in uplink and downlink of communication. The signals produced are in equal proportion to the quantity that is being measured. The information which is transmitted through these satellites includes everything. The transmission and carrying of signal between satellite and earth can be explained best considering a command and track module. The command system is the one which is present on the receivers end like on earth based stations usually. This system works by decoding, receiving and sometimes sending information.  The track system on the other hand guides and monitors the working of the satellite and its related movements. The communication of the satellites is completed using transponders and communication antennas. The transponders are two mode devices which contain an input de multiplexer and a power amplifier. Both of these receivers operate on a single communication mode. These antennas receive and send uplink and down link signals. Satellites communicate with ground systems such as the curved dishes, which are capable of reflecting outgoing systems from their horns. Moreover they can also return the signals of the incoming beams.


The Working of the Satellites
Any satellite cannot work without power and the key components such as receivers and antennas. Satellites are connected to the computer systems for the processing of data. The data is received and sent back using satellites. These satellites can gather the instructions from these systems as well. Satellites constitute many sensors, these sensors enable it to process the data and send it to earth. Telemetry system is a key to the purpose and operation of satellite working.  Satellites send encoded information to the earth based stations. This information is decoded using transponders. The working of satellites is possible with the power distribution to all the components connected to the satellite. The power supply is dependent on the use of the satellite. Short training satellites are usually powered by cells and batteries. The power for the long training satellites is usually derived from the solar cells mostly. In this way the fuel expense can also be lowered. Satellite communication can serve many purposes form TV broadcasting and telephone communication to weather updates.

As an practical application example, GRS Tracking is another the example of satellite.








Interested in Advertising your products or website with us? Click Why Advertising with us ?


Other Improtant topics

Computer Network Architechture :: Data recovery :: What is Data Mining & techniques :: Security issues of Computer :: Frame Relay :: How to create wireless groups :: How to design security policy for network :: How to Troubleshoot LAN :: How to Troubleshoot WLAN :: Infrared Network :: Introduction to Active Directory :: Network Management Software :: Network ports List :: Network Security Software :: Networking FAQ :: Online Security Threat :: Satellite Communication :: Submarine Communication Cable :: Telecommunication Networks :: WAN Technology :: What is Cryptography :: What is Optical Router :: Working Of Telnet :: Linux Server Adminstatrion :: Wireless Bridges set up techniques :: Digital Communication :: How to Configure Linksys wireless bridge :: How to setup wireless repeater :: Distributed Computing :: Hight Performance Computing :: Parallel computing :: Quantum Computing :: Super Computing :: Cloud Computing :: How to configure print server :: How video conferencing works :: Setting up TCP/IP network :: Recover lost hard drive data :: How to solve network performance problems :: 3GPP2 Multimedia Domain Architecture :: Network management model and architechture :: What is protocol analysis & Analyzer :: What is network address translator :: Internet network architecture :: Types of information technology :: What is DSL technology :: Dsl concept :: Dsl vs Cable internet :: Network simulator :: Next generation networks :: What is Switched mesh :: What is 127.0.0.1 :: How to change mac address :: How to flush dns :: EV-DO Rev. B Technology? :: What is network protocol :: What is ASIC :: Blu ray Technology :: Field Program Gate Array (FPGA) :: Computer networking with ethernet hub :: Intelligent networks :: Adsl problems and oppertunities :: Dsl components :: What is hub :: What is networking switch :: Hubs Vs Switches :: Frame relay networks

Browse All Categories