Satellite Ground Systems Glossary

A technique in which the modulation scheme and forward error correction code rate of a satellite link are dynamically ad...

Signal degradation resulting from imperfect alignment between a ground station antenna's beam axis and the target satell...

A closed-loop system that automatically adjusts a ground station's transmit power to compensate for signal fading, most...

An automated antenna control mode in which the ground station antenna continuously tracks a satellite's position using a...

The ratio of the received satellite carrier signal power to the total noise power in a specified bandwidth, expressed in...

The practice of placing two or more satellites at or near the same geostationary orbital slot, typically within ±0.1°, o...

The radio frequency transmission path from a satellite to an earth station or user terminal. Contrasted with uplink, whi...

The widely adopted international standard for broadband satellite transmissions, specifying modulation, channel coding,...

The extended version of the DVB-S2 satellite transmission standard, offering additional modulation schemes, wider rollof...

Energy per bit to noise power spectral density ratio; a normalised signal quality metric used in digital satellite commu...

A measure of the power a transmitting antenna radiates in a specific direction, combining transmitter output power and a...

The EIRP per unit of bandwidth, expressed in dBW/Hz or dBW/4 kHz, used to characterise the spectral intensity of a trans...

A table or data file giving the precise position and velocity of a satellite as a function of time, used by ground stati...

The additional signal power, expressed in decibels, built into a link budget above the minimum demodulation threshold to...

A channel access method in which multiple ground stations share satellite transponder capacity by transmitting on differ...

Forward Error Correction; a channel coding technique in which redundant data is added to a transmitted signal to allow t...

The international regulatory process by which satellite operators notify and negotiate with each other and with national...

Figure of merit for a receiving system, expressed as the ratio of antenna gain (G) to system noise temperature (T) in dB...

Geostationary Earth Orbit; a circular equatorial orbit at approximately 35,786 km altitude where a satellite appears sta...

A circular Earth orbit at an altitude of approximately 35,786 km above the equator in which a satellite's orbital period...

A high-power radio frequency amplifier at a ground station that boosts the uplink transmit signal to the power level req...

A formal engineering document that defines the technical interface between two systems or subsystems—such as a ground st...

A cost-saving operational mode for aging geostationary satellites in which north–south station-keeping is discontinued,...

Any unwanted signal that degrades the quality or availability of a desired satellite communication link, arising from co...