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
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
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 to a large number of stations, making satellites the natural
Works Cited Incomplete Sputnik: The Satellite That Inspired Generations Introduction In 1950, a group of American and European scientists decided to establish a worldwide program to promote research and understanding of the world around them. They decided that July 1957 to December 1958 would be called the International Geophysical Year, or IGY. They hoped that drawing attention to geophysical matters would stimulate new projects and inventions, and increase the knowledge the world had of
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
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
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
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
Satellite Radio When I drive my car around town running errands and going from place to place, it’s nice to listen to the radio. Now since this distance I am traveling seems to be within a 30-40 mile radius, flipping through the stations is not much of a problem for me. Now on the other hand, I do travel out of town frequently, and I hate it when I want to listen to the radio and there is no signal. The reason why none of us can is because radio signals don’t carry much farther than the town’s
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
Writing a "Private 3M Script" First it is important to define the term "3M." The term "3M" simply refers to a script's ability to unlock all of the channels, based on the saying "All for one, and One for all!" from the "3 Musketeers," (which came from the old days of hacking cable boxes where all channels were viewable through one channel). Anyway, "3M" now is just a generic term for a card that has all channels open and no stealth or write protection. In stealth scripts, the "3M" code refers to
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
photographic reconnaissance satellite program was the codenamed Discovery. These first satellites could see objects as small as 35-40 feet and once they ejected their film capsule, the satellites were forced to reenter and burn up in the atmosphere. The latest declassified satellite is from the late 1970s and can focus on objects as small as 5.5 inches. Instead of using a film canister, the KH-11 series of satellites uses a digital sensor and communications satellites. Because of the classified
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 was not
concern for the entire industry, the two companies engaged in a bloody war, that let the industry suffer one of the major loss ever and led to the merger of the two companies . This case outlines one of the most ferocious competitions of the satellite TV, and announces a series of battles under other skies in the same industry. The situation described in the case is much to be close to a “War Game” that ends up with a takeover of one on the other . Today’s view on that situation could
The main difference between early maps and contemporary mapping is that contemporary mappings are mostly based on the satellites which is more accurate. On the other hand, early maps were created by simple surveying tools, so they weren’t as accurate as modern maps. The early maps had no lines of longitude either. Map scale and projections in making map takes an important role because they interpret the result of the map’s image. A map scale shows the feature’s size compared to how it is on a map
Global-navigation Satellite Systems (GNSS) provide navigational data to airborne transportations and various other applications. Mainly two satellite constellations are in use today for navigational purposes. They are global positioning system (GPS) which is provided by the United States and global navigation satellite systems (GLONASS) which is provided by the Russian federation [1]. GPS and GLONASS satellites fly in medium Earth orbit (MEO) at an altitude of approximately 20,200 km and 19,100 km
COMPANY BACKGROUND SIRIUS Satellite Radio was incorporated on May 17, 1990 as Satellite CD Radio Inc. On November 18th 1999 the company changed their name to SIRIUS Satellite Radio Inc, which is the name under which the FCC license to distribute satellite radio was given to. SIRIUS Satellite radio currently offers over 100 of music, news, sports, talk, entertainment, traffic, weather, and children’s programming to subscribers throughout the United States. Their primary source of revenue is through
Video Transmission via Satellite Direct Broadcast satellite (DBS) delivers hundreds of TV channels to millions of people around the world. Satellite owners buy slots in space and lease assigned transponder frequencies to service providers. In this paper, I briefly introduce the history and development of DBS, the major vendors of the products, and overall market situation. In order to illustrate why DBS is such a popular technology, I also give out the comparison between DBS and the traditional