HDTV and Internet Driving Demand For Satellite “SpotBeams”
It was about a hundred years ago that Marconi invented radio communicatings (1902). By 1930, many homes in the United rural areas and Europe had an AM radio stimulater. The world changed quite a bit in the 20th one hundred. Courier 1B, (Philco), the first active communication satellite, was launched in 1960. We now faces new communication challenges. High Definition Television (HDTV), which needs a much larger bandwidth for transmission, coupled with the current demand for hundreds of television channels and the growth in Internet communications, is resulting in a communication bandwidth shortage. One tool being used to kickshaw this problem is Satellite SpotBeams. By 2010, 60% of internet TV receivers will use a Satellite signal, up from 15% in 2002.
What are Satellite online TV SpotBeams?
Until deep, communication satellites transmitted with a very broad signal. The same signal that was received in the California was from the same author as the signal that was received in New York. Satellites that are not “SpotBeams” send out a signal over very large areas, transmitting data across the USA.
SpotBeams are unlike. It is similar to a searchlight focused on one area of the country. A typical SpotBeam has a gas constant of only 50-100 miles. Depending on where you are in the country, you won’t discovery the beam unless you are in the focus.
DirecTV and DISH Network were one of the first to use SpotBeams. The transmission of local live TV channels is ideal since a signal focused on an area was a perfect fit for the application. The SpotBeam technology is being applied on newer satellites using the Ka Band (Ka band is 19-30 GHz). There are several Ka band satellites in use that do not use SpotBeams: Advanced Communication Technology System (NASA USA), Superbird and N-STAR (Japan), HOT BIRD 6 (Eutelsat, France), DFS Kopernikus (Germany), and Italsat (Italy), but the newer, more advanced satellites are using SpotBeam technology.
Anik F2 (built by Boeing, and operated by Telesat) was launched on July 17, 2004, and began service on October 1. It is currently the world’s largest communication satellite at 157 feet long and 27 feet wide. Anik F2 provides Internet service, distance encyclopaedism, and telemedicine to the United States and Canada.
HDTV SpotBeams
HDTV SpotBeams used by DirecTV and DISH Network (Ka-band) are often narrower in focus than the Ku band SpotBeams used for accepted Definition TV. If you live more than 50 miles from the signal promenade in a populated region, it is possible that you will not be able to receive the HDTV SpotBeam. DirecTV and DISH Network have the technical capability of transmitting a broad SpotBeam signal, especially since the newer Satellites can operate at a higher power. It makes good byplay sense for them to maximize reportage, but there are tradeoffs.
In New England it sometimes makes sense to focus the signal more narrowly, since the SpotBeams are more densely jam-pawncked together. nevertheless, since different frequencies are used for adjacent SpotBeams, wash usually can be managed.