This presentation was made for my 2nd year 2nd term course.
Me and my friend gave this presentation.
We are very much interested in cosmology and space program.
**If you want the script of this presentation leave a message in LinkedIn
If the communication takes place between any two earth stations through a satellite, then it is called as satellite communication. In this communication, electromagnetic waves are used as carrier signals.
Introduction
Need for communication
Satellite Communication
How a satellite works
Frequency Band of a satellite communication
Kepler’s Laws
Earth Orbit satellites
● Geosynchronous Earth Orbit
● Medium Earth Orbit
● Low Earth Orbit
Subsystems
● Space Subsystem
AOC Subsystem
TTCM Subsystem
Power and Antenna Subsystems
Transponders
● Earth Subsystem
Transmitter
Receiver
Earth Station Antenna
Tracking Subsystem
Multiple Access Techniques
● FDMA (Frequency Division Multiple Access)
● TDMA (Time Division Multiple Access)
● CDMA (Code Division Multiple Access)
Satellite Communication Services
● One-way satellite communication link service
● Two-way satellite communication link service
Global Positioning System
● GPS codes and services
● GPS receiver
Advantages
Disadvantages
Application
Bibliography
Conclusion
This presentation was made for my 2nd year 2nd term course.
Me and my friend gave this presentation.
We are very much interested in cosmology and space program.
**If you want the script of this presentation leave a message in LinkedIn
If the communication takes place between any two earth stations through a satellite, then it is called as satellite communication. In this communication, electromagnetic waves are used as carrier signals.
Introduction
Need for communication
Satellite Communication
How a satellite works
Frequency Band of a satellite communication
Kepler’s Laws
Earth Orbit satellites
● Geosynchronous Earth Orbit
● Medium Earth Orbit
● Low Earth Orbit
Subsystems
● Space Subsystem
AOC Subsystem
TTCM Subsystem
Power and Antenna Subsystems
Transponders
● Earth Subsystem
Transmitter
Receiver
Earth Station Antenna
Tracking Subsystem
Multiple Access Techniques
● FDMA (Frequency Division Multiple Access)
● TDMA (Time Division Multiple Access)
● CDMA (Code Division Multiple Access)
Satellite Communication Services
● One-way satellite communication link service
● Two-way satellite communication link service
Global Positioning System
● GPS codes and services
● GPS receiver
Advantages
Disadvantages
Application
Bibliography
Conclusion
Presentation on Satellite Communication
Presentation on Satellite Communication
Outlines:
History
Definition
Communication system
Architecture
Operation of satellite
Elements
>Space Segment
>Ground Segment
Earth Stations
Digital Earth Station
Orbits
Geostationary Orbit (GSO)
Non-Geostationary Orbit (NGSO)
Different Satellite Communications : Services
Advantages OF SATELLITE COMMUNICATION
Applications OF SATELLITE COMMUNICATION
Future
Conclusion
Satellite communication, in telecommunications, the use of artificial satellites to provide communication links between various points on Earth. Satellite communications play a vital role in the global telecommunications system. Approximately 2,000 artificial satellites orbiting Earth relay analog and digital signals carrying voice, video, and data to and from one or many locations worldwide.
Satellite communication has two main components: the ground segment, which consists of fixed or mobile transmission, reception, and ancillary equipment, and the space segment, which primarily is the satellite itself. A typical satellite link involves the transmission or up linking of a signal from an Earth station to a satellite. The satellite then receives and amplifies the signal and retransmits it back to Earth, where it is received and reamplified by Earth stations and terminals. Satellite receivers on the ground include direct-to-home (DTH) satellite equipment, mobile reception equipment in aircraft, satellite telephones, and handheld devices.
At present we can communicate instantly to any one in any corner of the world due to the internet, while next phase of internet will take us beyond the earth ,i.e. “interplanetary internet(IPN)” which will provide basis for communication system for a manned mission to the mars and planets beyond.
The existing internet on the earth and similar one on other planet linked by gateways, which will relay the information between the internets ,forms interplanetary internet. Thus interplanetary internet can be thought as “the network of disconnected internets”.
Deep space Network satellites around mars and new protocols constitute interplanetary Internet. Where DSN will serve as gate way of earth. A group of six micro satellites and a large mars at satellite is to be placed for implementation of interplanetary internet (IPN). IPN deals with new protocols like SCPS (Space Communication Protocols Standards), NTP (Network Time Protocol) and PTP(Parcel Transfer Protocol ).
The objective of interplanetary project is to define the architecture and protocols necessary to permit interoperation of the internet resident on the earth with other remotely located internets resident on the other planets or spacecrafts in transit.
Presentation on Satellite Communication
Presentation on Satellite Communication
Outlines:
History
Definition
Communication system
Architecture
Operation of satellite
Elements
>Space Segment
>Ground Segment
Earth Stations
Digital Earth Station
Orbits
Geostationary Orbit (GSO)
Non-Geostationary Orbit (NGSO)
Different Satellite Communications : Services
Advantages OF SATELLITE COMMUNICATION
Applications OF SATELLITE COMMUNICATION
Future
Conclusion
Satellite communication, in telecommunications, the use of artificial satellites to provide communication links between various points on Earth. Satellite communications play a vital role in the global telecommunications system. Approximately 2,000 artificial satellites orbiting Earth relay analog and digital signals carrying voice, video, and data to and from one or many locations worldwide.
Satellite communication has two main components: the ground segment, which consists of fixed or mobile transmission, reception, and ancillary equipment, and the space segment, which primarily is the satellite itself. A typical satellite link involves the transmission or up linking of a signal from an Earth station to a satellite. The satellite then receives and amplifies the signal and retransmits it back to Earth, where it is received and reamplified by Earth stations and terminals. Satellite receivers on the ground include direct-to-home (DTH) satellite equipment, mobile reception equipment in aircraft, satellite telephones, and handheld devices.
At present we can communicate instantly to any one in any corner of the world due to the internet, while next phase of internet will take us beyond the earth ,i.e. “interplanetary internet(IPN)” which will provide basis for communication system for a manned mission to the mars and planets beyond.
The existing internet on the earth and similar one on other planet linked by gateways, which will relay the information between the internets ,forms interplanetary internet. Thus interplanetary internet can be thought as “the network of disconnected internets”.
Deep space Network satellites around mars and new protocols constitute interplanetary Internet. Where DSN will serve as gate way of earth. A group of six micro satellites and a large mars at satellite is to be placed for implementation of interplanetary internet (IPN). IPN deals with new protocols like SCPS (Space Communication Protocols Standards), NTP (Network Time Protocol) and PTP(Parcel Transfer Protocol ).
The objective of interplanetary project is to define the architecture and protocols necessary to permit interoperation of the internet resident on the earth with other remotely located internets resident on the other planets or spacecrafts in transit.
A satellite system is a set of gravitationally bound objects in orbit around a planetary-mass object or minor planet, or its barycenter. Generally speaking, it is a set of natural satellites (moons), although such systems may also consist of bodies such as circumplanetary disks, ring systems, moonlets, minor-planet moons, and artificial satellites any which may themselves have satellite systems of their own.
NASA's Psyche Spacecraft Achieves Milestone in Laser Communication | Enterpri...Enterprise Wired
NASA's exploration frontiers have been pushed further as the Psyche spacecraft accomplished a pioneering feat in space communication, marking a significant breakthrough for the agency.
2. The purpose of this report is to discuss the various communications system that NASA
and other space agency use to communicate with in space. When astronauts have to
communicate with ground control, with satellites, and aboard various spacecraft. While in
space astronauts uses a device called CCA also known as Communications Carrier Assembly.
The CCA also called the “Snoopy Cap is a fabric hat fitted with microphones in the ear for
listening.
The CCA has a boom microphone locate in front of the astronauts mouth for speaking.
Even though NASA uses the CCA they are currently working on developing a new space suit
with a new means of communication. That new project is called ETDP or Exploration
Technology Development Program that is involved with testing various communications
system with the new space suit.
A new form of communication systems also involves the use of laser technology. The
Lunar Laser Communication Demonstration or LLCD was used in a demonstration for 30
days for a possible means of creating a higher board band communication in space. The laser
is capable of reaching over one quarter of million miles and seem to work error free. Another
familiar type of communication system that is well known is satellite communication. Satellites
require amplified radio signals sent by a transponder. When it comes to communicating with
satellites there has to be two channels of communication a transmitter and a ground receiver.
Satellite is the most common means of communications in space in cellular networks,
space telecom systems, radio transmission, and even television. The important satellite
3. communication in space is very important when it comes to keep our astronauts inform with
what goes on around them.
CCA also known as the Communications Carrier Assembly typically worn by
astronauts in space. It give them the ability to communicate with each other and ground
control during space missions. No matter where the astronauts are inside or outside of the
space craft. Even if they repairs on the space craft itself they are still able to communicate.
One drawback is the CCA has to be fitted to each astronaut head size.
Neither can the CCA caps be adjusted to fit around the visor or helmet of each
astronaut. For an example if an astronaut is in space and his helmet or microphone shifts it
can cause communication to be demise periodically. The boom microphone can also be an
issues for food consumption and drinking fluids during long-duration of spacewalks.
4. The newest technology currently being developed by NASA is the LLCD or Lunar
Laser Communication Demonstration. It’s capable of transmitting and receiving signals a
great speed with little or no error during the communication channels. It can download and
upload information at the speed of 622 megabits per second and at 20 megabits per second.
Also it capable at working with any current radio systems today. Don Cornwell the mission
manger state that “Throughout our testing we did not see anything that would prevent the
operational use of this technology in the immediate future”.
But there is promising use for it when NASA Goddard Space Flight Center used the
devices during one of its mission. The mission consisted of LLCD demonstrating error free
communication during broad daylight and even operating with different moon phase and not
5. having a single error. It also was able to communicate with ground station with wind and
atmospheric turbulence did have any affects.
Also it was able to work with the LADEE or (Lunar Atmosphere and Dust Explorer)
spacecraft and download up to 1 gigabytes of scientific information in less than five minutes.
The only limitation the connection had was the due LADEE spacecraft at 40 megabits per
second. The issue was due to the on board radio system that took a quite a few days to
completely download all of the exact same data. The unique thing about using the LLCD is its
ability to send and receive HD quality video from NASA Administrator Charlie Bolden from
the moon and back to Earth without any interruption.
6. Satellites communication system are very important to everyday life from GPS, to
meteor logical surveying, and communicating with various ground base antenna giving NASA
mission control information about astronauts. Without various types of satellites today world
would be chaotic and difficult to live in. Because we rely on satellites to navigate us around
the world using GPS. For an example most GPS satellites use NAVSTAR Global Positioning
Systems that provided weather conditions, the location of where the weather is, and for
civilian use for traveling.
Most satellites used in space communication systems on the other hand send radio
waves transmitted to antennas on Earth. The information that is sent is usually is scientific
thing like picture reserved, the present health of the satellite, and where the satellite currently
located in space. The satellites may gather information from celestial object like comets,
asteroids, and even planetary object within range as well. The satellites NASA use have high
power transmitters on their satellites that send signal to their ground based receiver. For an
example to gratify NASA desires for space communication they use several type of
sophisticated networks. The first type DSN or Deep Space Network which is used to provision
all of the scientific spacecraft that gather information from low earth orbit, the edge of the
solar system, and elsewhere in the universe.
The other type of network NASA use is SN or Space Network that is used to provided
tracking and data that is relayed for satellites, spacecraft, and any vehicle other used in space.
The type of vehicle usually are ground based rovers like Curiosity being used on Mars for
exploration of the planetary body.
7. This is all a part of NASA Space Communications and Navigation or (SCaN) system
that functions as a global radio communication infrastructure.
This is a picture I obtain via the internet showing the various means NASA uses to
communicate with their rover curiosity. The MSL Telecommunication Network use various
sophisticated means to transmit and receive data, commands, and information millions of
miles away for space explorations at ground level on the planet Mars. As you can see it takes
ground antenna to send and receive information to the various satellites on the location of
Curiosity. While the satellites like the bean that information to Curiosity to do various things
like stake picture, retrieve sample on Mars, and explorer the surface of Mars.