Satellites

Satellites

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

Contributors in Satellites

Satellites

The time it takes for a signal to go from the sending station through the satellite to the receiving station. This transmission delay for a single hop satellite connexion is very close on one-quarter ...

Demand-assigned multiple access (DAMA)

Aerospace; Satellites

A highly efficient means of instantaneously assigning telephony channels in a transponder according to immediate traffic demands.

Decoder

Aerospace; Satellites

A television set-top device which enables the home subscriber to convert an electronically scrambled television picture into a viewable signal. This should not be confused with a digital ...

Decibel (dB)

Aerospace; Satellites

The standard unit used to express the ratio of two power levels. It is used in communications to express either a gain or loss in power between the input and output devices.

Declination

Aerospace; Satellites

The offset angle of an antenna from the axis of its polar mount as measured in the meridian plane between the equatorial plane and the antenna main beam.

Data service unit (DSU)

Aerospace; Satellites

A device used in digital transmission that adapts the physical interface on a DTE device to a transmission facility such as T1 or E1. The DSU is also responsible for such functions as signal timing. ...