Satellite Phones

The basic types of system includes geostationary satellites (GEO), Low Earth Orbit (LEO), Medium Earth Orbit (MEO) and highly elliptical orbit (HEO) satellites. There are also public and private systems, such as satellite TV Receive Only (TVRO), Direct Broadcast Satellite (DBS), Global Positioning System (GPS), satellite and several operations.

Geostationary satellites orbit the Earth at regular points in time and again over time. Each GEO satellite on a point above the equator stationary and therefore does not require any charge of receiving and transmitting antennas on Earth. GEO satellites, allowing the collection of weather events. They are particularly useful for surveillance of severe local storms and tropical cyclones. They are mostly used for television broadcasting and high speed data transmission.

Low Earth Orbit (LEO) satellite systems to fly very close to the Earth’s surface, up to 1500 km altitude. They offer more significant voice in the GEOS and transmission of signals with a slight delay. Some LEO systems are mobile phones and global satellite personal communications systems developed. This can take the voice traffic, among other formats.

Medium Earth Orbit (MEO) satellite system operating at about 10,000 km above the Earth and is therefore lower than the GEO orbit, but more than LEO orbits. They have a greater capacity than Leos. This allows them greater flexibility in meeting changes in demand for voice or data.

Highly elliptical orbit (HEO satellite) orbiting the Earth in an elliptical orbit, in contrast to the LEO and GEO orbits. The elliptical orbit allows a wider view of the land and maximize the time that each satellite spends exactly populated. It is, therefore, requires less than LEO satellites, and offers an excellent line of sight.

TVRO (Television Receive Only) and DBS (Direct Broadcast Satellite) systems for satellite TV. TVRO trusts RSS feeds transmitted in the clear use of open standards. C They are often called broadband satellite, Big Dish TV or Big Ugly Dish (BUD).

DBS operates at higher frequencies. It is capable of transmitting signals of high performance. DBS was primarily intended for reception at home. Therefore, it is also known as direct to home satellite is known.

DBS Satellite TV operators via satellite. This means they must be delivered for free channels.

A global positioning system and compares receives signals from GPS satellites in orbit to determine the geographic location. Each satellite can transmit your exact location with a reference signal measured using GPS to determine the distance between the satellites. The site is calculating the point at which marked all distances. The information may, in latitude or longitude, or displayed as an item on a computer map.

The multiple-satellite operation using Spatial Division Multiple Access (SDMA) technology. This allows a single satellite, simultaneously, on 2 different satellites communicate via multiple antennas.