Satellites

Satellites

Of or relating to any man-made object launched to orbit Earth or another celestial body.

Contributors in Satellites

Satellites

A process to eliminate frequency interference between different satellite systems or between terrestrial microwave systems and satellites. In the U.S. this activity relies upon a computerised service ...

Frequency

Aerospace; Satellites

The number of times that an alternating current goes through its complete cycle in one second of time. One cycle per second is also referred to as one hertz; 1000 cycles per second, one kilohertz; ...

Footprint

Aerospace; Satellites

The geographic area over which a satellite antenna receives or directs its signals. There is often a collection of concentric footprints, each representing a particular satellite EIRP or G/T. These ...

Forward error correction (FEC)

Aerospace; Satellites

Adds unique codes to the digital signal at the source so errors can be detected and corrected at the receiver.

Frequency division multiple access (FDMA)

Aerospace; Satellites

Refers to the use of multiple carriers within the same transponder where each uplink has been assigned frequency slot and bandwidth. This is usually employed in conjunction with Frequency Modulation.

Feed

Aerospace; Satellites

This term has at least two key meanings within the field of satellite communications. It is used to describe the transmission of video programming from a distribution center. It is also used to ...

Guard channel

Aerospace; Satellites

Television channels are separated in the frequency spectrum by spacing them several megahertz apart. This unused space serves to prevent the adjacent television channels from interfering with each ...