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Friday, August 1st, 2008Our daily lives are affected regularly by communications satellites. Communications satellites provide an effective way to connect people and business from the most remote areas of the world to civilization. Many forms of business use communications satellites, like newspapers, gas stations, Internet service providers and even emergency management officials.
What makes communications satellites so useful is the frequency range at which these systems operate. Communications satellites operate near or in the microwave frequency range. This frequency range is optimum for carry large quantities of data. They are also best suited for line of sight (LOS) communications. LOS means the antennas have to see each other for the signal to be received. These frequencies are not reflected or absorbed by the Earth’s atmosphere like in the case of HF signals reflected by the ionosphere.
Commercial Satellite Communications System-Finding Answers
Saturday, December 22nd, 2007Commercial satellite communications systems solutions are used by corporations of many sizes and extend a vast array of industries. From energy, oil, mining, and medical to education, on demand and reliable commercial satellite communications system are more key than ever. The need for reliable Internet, TV and radio services continues to multiply as the need for instantaneous commercial satellite communications systems become a mainstay of business.
No matter the industry, maintaining commercial satellite communications systems are essential and maintaining absolute control of business operations is essential. Finding a commercial satellite communications system provider with access to earth stations around the globe, is significant for long term stability and growth. Integrating voice, video and high speed Internet via satellite for a compny’s important data communications is imperative in the ever altering world of commerce.
Microwaves And Satellite Communication
Thursday, November 22nd, 2007An essential property of microwaves is that they travel in straight lines through the atmosphere, are not affected by the ionized layers. Also these waves are very less affected by temperature inversions and scattering. But these weather effects limit the distance between the transmitter and the receiver to a few miles. This problem is over come by usage of repeater stations placed along the propagation path that extend the distance over which communication can occur. Basically a microwave repeater is a receiver/amplifier/transmitter combination used for relaying microwave signals in long distance and overland communication links. As frequencies of the signals increase thereby distance between repeaters decrease.
Digital Satellite Communications Books
Monday, October 1st, 2007Digital Satellite Communications Series: Information Technology: Transmission, Processing and Storage
Corazza, Giovanni E. (Ed.) 2007, L, 533 p., Hardcover ISBN: 978-0-387-25634-4
Digital Satellite Communications Training
Sunday, September 30th, 2007If someone is looking to learn more about digital satellite communications, there are various courses, schools and books available.
Below is a few schools that provide courses in digital satellite communications along with the course descriptions.
Applied Technology Institute
Digital Satellite Communications course
Summary:
This four-day short course covers all the technology areas which comprise digital satellite communications. The course is designed to convey the fundamental communications principles behind current state-of-the-art satellite communications equipment. New and promising technologies will be covered to develop an understanding of the major approaches. System design approaches for Big LEO, Little LEO, DTH, Direct Radio, VSAT, commercial satellite imaging, and multimedia satellite services.
Johns Hopkins University
525.789 – Digital Satellite Communications Course