Communication Satellites Have you ever thought about how that little phone in your hand works? What about how you always seem to have internet and cable access? A satellite is a device put into orbit around Earth that uses receivers, amplifiers, and transmitters to receive and send signals around the globe (“Communications Satellite Aug. 2007”). Satellites provide the signals to these and more devices. Satellites orbit Earth and provide global communications, as well as collect valuable data. Many
History of Satellite Communications The first idea of satellite communication came from an article in 1945 named Wireless World, where Author C. Clarke described the use of manned satellites in 24 hour orbits to distribute television programs. However, the first person to carefully evaluate the technical and financial aspects of such a venture was John R. Pierce of Bell Telephone Laboratories (Whalen, n.d.). In a 1954 speech and 1955 article, Pierce described the usefulness of a communications "mirror"
possible, is global communication via satellites or COMSATS [1]. In this essay the advantages and limitations of (global communication satellites with regard to social and cultural factors will be discussed and evaluated. The very first attempt at a communication satellite was during the 1950’s called, project communication moon relay launched by the USA, attempting to develop a reliable method of wireless communication by using the Moon as a natural communications satellite. Although the project
discoveries made during previous space travel led to our satellite communications systems, GPS, and CAT scanning which has improved many lives (2). The inspiration for further research spurred by space exploration can be phenomenal. The proponents of interstellar exploration have made many advances in space travel. Amazingly, space travel did not begin until halfway through last century! In 1957, the Soviet Union launched the first manmade satellite into space, Sputnik 1. Later that year, Sputnik 2 carrying
Satellite Surveillance I. Preface My interest in satellite surveillance did not really appear to after I saw the movie "Enemy of the State" in 1998. The synopsis of the movie is: Robert Dean (Will Smith) is a labor lawyer who is unknowingly in possession of evidence related to a serious politically motivated crime. Government agents eager to hide their guilt believe that Dean is on to them, and proceed to turn his life upside-down, ruin his reputation, and frame him for various incidents, thanks
Introduction What is Satellite? Satellite is the moon, planets or a planet orbiting machine or stars. For example, the Earth is the satellite as it orbits around the sun. So the moon, the moon is a satellite as it circles the earth. Usually, the word "satellite" refers to a machine that was launched into space, and move around the earth or other planets in space. Earth and moon are examples of natural satellites. Thousands of artificial or man-made satellites orbit the earth. Some take pictures of
Satellites A satellite is defined as an object that orbits or revolves around another object. In basic terms, this relationship is due to the gravitational pull of the larger object while the smaller one has enough velocity and momentum to circle the larger one (Fitzgerald &Dennis). This is a good definition if one is only speaking of the broad principles of why and how objects attract one another and where in nature this occurs. The billions of stars and planets together make up a vast network
the effectiveness of Wireless Communication, its advantages and disadvantages. This will include the different types of Wireless technologies and how they will make transmitting data easier or harder than ever. Also I will talk about Wired communication which is one of the older technologies but now we have several different types of media forms on wired communications and they all do a different job. Wireless Technologies could be satellite links or Radio communication. They all have good and bad
internet connectivity with means of terrestrial internet communication services. The O3B NETWORKS is aiming to provide high-speed internet and telecommunications services connectivity to these three billion people by means of satellites. The O3B NETWORKS was founded by Greg Wyler in 2007 and the Company brought up a different approach to provide internet connectivity in the current typical market of GEO satellites. A traditional GEO satellite is placed in an orbit around a distance of 3600 kilometers
launch of the first successful artificial satellite Sputnik on October 4th 1957 humanity has launched thousands of satellites into orbit above Earth. The prodigious use of Earth’s orbit has resulted in an important consequence, space debris. While currently most space debris does not pose a serious threat to Earth or operating space technology the planned increase of satellite launches as well as the continued accumulation of debris from current satellites will necessitate drastic action in order
Satellites Satellite is probably the most useful invention since the wheel. Satellites have the capability to let you talk with someone across the nation or let you close a business deal through video communication. Almost everything today is heading towards the use of satellites, such as telephones. At&t has used this communications satellite (top right) ever since the late 1950s. TVS and radios are also turning to the use of satellites. RCA and Sony have released satellite dishes for Radio and
broadband connectivity are or will shortly be available, communication satellites are beginning to emerge as an attractive solution in providing broadband connectivity to a variety of users. The wide area or global coverage of satellites enables service provision to a large number of dispersed users and solve the expensive "last-mile" issue without dedicating to each user cable, fiber, switching equipment ports, etc. The broadcast nature of satellites supports efficiently the transmission of the same message
The Emergence of Satellite Radio While the transition of television to a digital technology with its improved picture and sound quality has been a much publicized and controversial process, television's venerable ancestor, radio, has stayed in the background. But this year, in the United States, radio broadcasting is making its own digital leap. Two start-ups are introducing a new type of radio broadcast--subscription-based digital audio sent from satellites. With satellite digital audio radio
and rockets that could go higher, faster, and farther than their countries. These rivals needed to place themselves in space to have dominance over one another. They could potentially have orbital weapon systems, be able to intercept and inspect communications of their enemies, possible military use for the moon. These things motivated the military part of the space race. The next incentive for the space race was for peace. Some wanted to partner with other space programs so they could use space as
Space Debris Why space debris? Because that the space is getting messy. Space trash is a big problem. The amount of debris orbiting keep growing ever single year. disrupting satellites and occasionally putting astronauts in harm’s way. if the problem gets severe enough, it should eventually make low-earth orbit unusable. Since 1970s, some scientists have been worrying about the space debris. How fast the space debris orbiting the Earth? In the low Earth orbit is below the 2,000,000 m space
GPS receiver, navigation computer, sensor interfaces, storage interfaces and a display unit.GPS antenna receives GPS signals from satellites. We have various GPS antenna configurations like, spiral helix, micro strip and planar rings. However, Popular among all is patch antenna. GPS signal uses Code Division Multiple Access (CDMA) spread spectrum to facilitate satellites to use common frequencies without interference. Also GPS signal provides two codes, course acquisition (C/A code) used for civilian
Satellite technology has advanced dramatically since the launching of the first artificial satellite, Sputnik, in 1957. There are hundreds of satellites orbiting Earth right now, launched and funded by many different nations (the US included). They are used for things like GPS or cellular communication, but also for measuring different aspects of our planet. Satellites’ ability to see into different sections of the light spectrum enable them to collect data better and more efficiently than ever before
exploration came into play during 1959 when the first suborbital sounding rocket was launched from Manitoba. • Canada became the third country to actually send an atmospheric science satellite known as Alouette 1 in 1962. • Launch of the herms in 1976 was world’s first direct to home experimental telecommunication satellite. • And then the most innovative, famous and important invention the Canadarm in 1981, which was placed on to ISS. • First Canadian astronaut into space was Marc Garneau during
Satellites were a very important part of the Space Race and are still very important today. There are different functions for each satellite. Some are for television networks while others can save lives and predict the weather. Satellites are used every day to help with navigation and positioning systems. Over two thousand five hundred satellites have been sent into space and around one thousand are still operational. NASA, during the Space Race, was responsible for creating complex software
B. Satellites for navigation Satellites provide the necessary information to the navigation system to measure vehicles location. There are about 31 active satellites used for GPS communication, which are rotating around the earth’s axis. Their orbit is inclined 55 degrees with respect to the equator. Satellites are placed at 20,000 km from the earth’s surface. The orbits are designed in such a way that each satellite rotates two orbits per day. Orbits are planned so that at least 6 satellites in