If you know the longitude of a satellite, you knows where the satellite is located in the sky because all geostationary satellites are located above the equator or zero latitude. To further confuse things, longitude is divided into two halves: western and eastern hemispheres.
A satellite orbiting over Malaysia that services Asia and Australia may have the orbital slot of Satellite longitudes help installers locate where to point a satellite dish. They also help in finding obstacles from an installation location and the satellite. Any obstacle such as a tree or mountain will interfere with a satellite signal.
It is important that there are no obstacles between the installation location of the satellite dish and the orbiting satellite. Fortunately, finding if there is clear line of sight is is simplified by using a look angle calculator. Plug these two details in, and the calculator will give you a compass heading of the satellite, and the degrees up from the horizon it is located, and a cool overhead picture of the installation location including a line showing the direction of the satellite.
Here is the free look angle calculator from Ground Control. Latency simply refers to how long it takes a single piece of information to make a round trip back and forth over a satellite connection. Data over satellite travels at the speed of light — , miles per second.
Who wants to pull a virtual trigger and wait half a second for the gun to go off? Ground Control iDirect services have a latency time between to milliseconds, which is only half as much as consumer-grade service providers. A common misconception is that latency has an effect on transfer rate, or the speed in which you can transfer a file. This is not true. A one megabyte file will transfer just as quickly over a 5 Mbps megabits per second satellite connection as it does over a 5 Mbps terrestrial connection.
The only difference is that the satellite connection takes a half second to begin the file transfer, which is insignificant.
CIR is a term often used in the satellite industry. It simply means what the satellite ISP is committed in guaranteeing your lowest speed. The signal is then amplified and sent back towards Earth using a different frequency. The shape of a satellite dish is called a parabola. Home satellite dishes normally only contain a small section of the side part of the parabolic shape. The signal is reflected towards the receiver, which contains a small metal bar that acts as the antenna.
For television reception, the signal is then amplified and sent to the television decoder. Radio waves are used to carry satellite signals. This means that a signal sent to a satellite 38, km away takes 0. If several satellite links are used, the delay for a signal to be received from the other side of the world is a quarter of a second greater for each satellite link used.
This time delay can be seen when a television interviewer asks a question to a person on the other side of the world. There is often a short delay between the question asked and the answer given.
Only one satellite is needed to transmit television signals to a whole country or other large region of the Earth. The signals sent from a satellite can be shaped to match any coverage footprint required.
For example, the Optus D1 satellite was launched in to provide television signals for the whole of Australia and New Zealand. A new dish design uses two or more horns to pick up different satellite signals. As the beams from different satellites hit the curved dish, they reflect at different angles so that one beam hits one of the horns and another beam hits a different horn.
The central element in the feed horn is the low noise blockdown converter , or LNB. The LNB amplifies the radio signal bouncing off the dish and filters out the noise radio signals not carrying programming.
The LNB passes the amplified, filtered signal to the satellite receiver inside the viewer's house. Sign up for our Newsletter! Mobile Newsletter banner close. Mobile Newsletter chat close. Mobile Newsletter chat dots. Mobile Newsletter chat avatar.
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