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GIBEA, Gibea
2 GNSS integrity broadcast.
GIBEA, Gibea Guilde Belge des Electroniciens de
l’Aviation (Belg.).
Gibli Hot dry wind in N Africa, similar to Sirocco.
Gibson criteria A series of assessments, such as attitude
gain or frequency response plotted against phase angle, in
an attempt to avoid PIOs.
GIC GNSS, or GPS, or GPS/WAAS, integrity channel.
GICB Ground-initiated comm-B, radio plus DME.
GID Government Inspection Division (CAA).
GIDEP, Gidep Government/industry data exchange
program (DoD, US).
GIDS, Gids Gate information display system.
GIE Groupement d’Interêt Economique.
GIEL Groupement des Industries Electroniques [office,
Paris] (F).
GIES Ground imagery exploitation station.
GIF 1 Guy in front (see GIB).
2 Graphic[s] interchange file, or format.
Gifas, GIFAS Groupement des Industries Français
Aéronautiques et Spatiales [aerospace industries trade
association 200+ members; office F-75782 Paris] (F).
Gift Geosynchronous imaging Fourier transform spectrometer.
GIG 1 GPS integration guidelines.
2 Global information grid (DoD).
giga Prefix, symbol G, = 10 9 .
GIG-BE GIG(2) bandwidth expansion, links centres
with 10 Gbits/s fibre optics.
GIGO, Gigo Garbage in, garbage out [EDP truism].
GIHO Ground-initiated handoff.
GII Global information infrastructure.
GIITS General imagery intelligence training system.
GILA Generalised integrated learning architecture
(Darpa).
Gilham Code Gray code.
gill Non-SI unit of liquid measure. UK * = 1.42065
10 –4 m 3 ; US * = 1.18294 10 –4 m 3 .
gills Hinged flaps at rear of engine cowling or other
compartment to control cooling airflow.
Gimads Generic integrated maintenance diagnostics
(USAF).
gimbal 1 Mounting with at least two, and usually three,
mutually perpendicular and intersecting axes of rotation.
2 Gyro support which provides spin axis with degree of
freedom.
3 To pivot propulsion engine for TVC.
4 To mount on *.
gimbal freedom Maximum angular displacement about
gyro output axis, expressed in degrees or in equivalent
angular input.
gimballed chamber Rocket-engine thrust chamber
mounted on gimbal (3) so that it can swivel about one axis
(or two perpendicular axes).
gimbal lock Condition of two-degrees-of-freedom gyro
wherein alignment of wheel spin axis with axis of freedom
removes degree of freedom, rendering gyro useless.
Gins 1 GPS/INS.
2 Gravimetric INS.
GIP 1 Ground instructor pilot.
2 Generic interface processor.
3 Government/industry partnership.
GIPS Geospatial information production system
(NIMA).
glaze finish
GIRA Groupe d’Instruction des Reserves de l’Air(F).
GIRD, Gird Group for study of reaction (ie, rocket)
engines (USSR, 1932–34).
girt bar Rapid-action link which in emergency transfers
upper attachment of an escape slide from a door to the
door sill.
GIRTS Generic IR training system (ASD).
GIS 1 Geographic[al] information system[s] (civil, US).
2 Graphic[al] information system.
Gismo Globally integrated satellite mobile operating
system.
GISS Goddard Institute for Space Studies (NASA,
New York City).
GIT General interface terminal.
GITC Guns in the cockpit.
GIUK Greenland/Iceland UK, supposed air-defence
gap.
GIVS Groupe Interministeriel des Vols Sensibles,
charged with security of commercial flights (F).
GK Loop gain, plan × compensator [many suffixes].
GKAP State committee on aviation industry (USSR,
R).
GKAT State committee on aviation technology (USSR,
R).
GKO State defence committee (USSR, R).
GKS Graphic[al] kernel system (WMO).
GL 1 Ground level.
2 Group length.
GLA Gust load alleviator.
GLAADS Gun low-altitude air-defense system (USA).
GLAM Groupe de Liaisons Aériennes Ministérielles
(F).
gland Short tube fitted to airship’s envelope or gas bag
through which rope may slide without leakage.
Glare Glass-fibre prepreg tape reinforced aluminium
alloy [usually multi-ply].
glareshield Overhanging lip above instrument panel to
protect pilot’s night vision from bright reflections on
windshield.
G-Lars Guided launch and recovery system; /PLS adds
precision landing system.
GLAS Gust-load-alleviation system.
glass aircraft One with high proportion of GRP in
airframe, including skin.
glass cockpit One featuring electronics displays in place
of traditional instrument (colloq.).
glass-fibre Produced by melting glass and spinning on
revolving drum, fibres being typically 0.025 mm diameter.
Fibreglass is registered name. Produced in many forms for
structural or optical properties.
glass floor Zero accidents or reportable incidents.
Glasshouse Detention centre, military prison (UK,
colloq.).
glass wool Produced by forcing molten glass through
orifices of approximately 1 μ diameter.
Glast Gamma-ray large-area space telescope.
Glauert factor Increase in lift coefficient due to fluid
being compressible, = (1 - M 2 ) -½ .
Glavkosmos Chief Administration of Space Launch
Services (R).
Glavkoavia Chief Administration of Aviation (USSR).
glazed frost Rain ice, layer of smooth ice formed by fine
rain falling on sub-zero surface.
glaze finish Vitreous enamel coating on metal.
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