A geosynchronous satellite whose circular and direct orbit lies in the plane of the Earth's equator and which thus remains fixed relative to the Earth; by extension, a satellite that remains approximately fixed relative to the Earth. [NTIA] [RR] [47CFR]

The orbit in which a satellite must be placed to be a geostationary satellite. [NTIA] [RR]

Any orbit about the Earth, which orbit has a period equal to the period of rotation of the Earth about its axis, and in the same sense, i.e., direction, as the rotation of the Earth.

A germanium-based PN- or PIN-junction photodiode.
Note 1: Germanium photodiodes are useful for direct detection of optical wavelengths from approximately 1 m to several tens of m.
Note 2: Germanium-based detectors are noisier than silicon-based detectors. Silicon-based detectors are therefore usually preferred for wavelengths shorter than 1 m. [After FAA]

Abbreviation for Government Emergency Telecommunications Service (GETS).

1. Global Functioning Plane,
2. Generic Framing Procedure.

Gateway General Packet Radio Service Support Node

In the transmission or recording of raster-scanned analog television signals, an artifact manifested as a weak, ghost-like secondary image, offset (in the direction of the scan) with respect to the position of the primary image.
Note: Ghosting is probably most familiar as a consequence of multipath rf reception of a broadcast television signal. The slight delay in the arrival time… (Read More →)

See ghost.

(or . gif) Abbreviation for graphical interchange format. A file-name extension indicating a certain digital image file format suitable for efficiently importing image data into computer files or for transmitting or displaying the formatted image on a computer monitor or printing it out.