1 - NGA

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permit Ihaii flexible expfoiibrr in the provisiin
of Tarrain Anafyeia Products.
Tormlrr Edft StntlordElevation Matrix
Procosslng System (TES/EMPS)--A n
Inlsrgraph wrrktatb! used by DktA to adif
terrain products. Gwea tmfh pten end
perspective views.
Tormln Profllo Racordor (TPR)-A n
elacttmnic instrument that emits a pubad-fypa
radar signal from an aircraff to the EarUt’s
Surface, measuring vertiil distances In odar to
obtain a profile beneath the track of the aimaft.
Alse called Airborne Proffl. R-order. See
aleo Ieur terreln profile recorder.
terrahr enalysle (TA)- (NATO) The precess
of cdlacliig, analyzing and evaluating
W’39mphfc information on Ihe netural and manmade
features of the temein and ifs
inferpretdion in combination with other factors
to provide pradbfive information and etilce
abouf the effecl of the terrain cm mifibwy
operations.
terrnin contour matching (TERCOM)-
The procese which u#ates navigational
guidance systems through correlation with
griddad terrain elevatien data derived from
photogrammetric or large scale certographu
sources. See also tarreln corralatlon.
tcwraln corractioti positive correction used
in conjunction with olher rmrrections in making
gravity redutilons. M fakes into acsunl actual
deviations from level terrain in the wee
eurroundhg e statkm by removing rnaaaas
above ha horixon and fifliig in mesa
dafiiiencles bebw. Alas called topographic
correction.
tormfn correlation-A pmca= used by a
vehicle’s guidance system in evaluating the
elevations of the terrain if is ffyfng ovar and
co~fig it with pmstorsd dqital terrain
elevation dala. See also terrain contour
metchlng.
terreln embose—A model-making technique
for portraying relief on a chart. A photographic
P~ ia used 10 produce the shaded relief
effect from an embossed model.
terrain following-Tha flight rrmde by whch a
vehicfe maintains a apacifii affifude above the
Earth’e eutiace.
MIL-HDBK-850
255
terrain lntelflgence-(JCS) Procaaaed
information on the mifiiary signifiince of natural
and nmn-rnade cfusrecteriaiic-s ot an area.
tarmln modaf-A three-dimensional graphic
mpreaanfation of en eras, showing the
conforrrmtion of the ground, modeled to scale
and uauatly handpainled to depict mefisdcalfy
man-made and natural phyaiGsl fea!uraa. The
vertical ecefa is usuefly eoraggereted, witheuf
severe d@orfion, to _nfuafe the aspacf d
rafief.
terrain protlle photography- Cartographic
photography obtained simuftaneowfy with
posflionai carnam pfrotogmphy and recording of
data ralaiing to profile elevat”mn inf-tion of
the Iarrah abng or near the fpurd track of the
aircraft. The terrain profile recorder k norrnalfy
used as the measuring device.
termln profillng-obtaining en elevation
prdlle of the Earth% terrain alsng or nmr the
ground track of the aircraff by use of a Tarrain
Profile Recorder.
terrain study-(JCS) An analysis and
interpretation d natural and rnenmade, their
effects on military operetiina, and the affect 64
weather and climata on these faatuma.
terrain—An area of ground conaidarad es to
its astent and topography.
terrastrlal camare-A camera designed for
use on the ground. Also called ground
cam. rm.
terrestrial coordlnatas—See geographic
coordlnat-a.
terreetrlal ●quator—See aetronomlc
equator; geodetic aquator.
termatrlrd globeA sphere, en the outer
surface of which by means of
reference fines, ihe faatures of~*~~tic#
the Earth are shown in relative pctaifiens.
terrestrial Ietftude-fatifude on the Earth;
angular distance from the Equator.
terrestrial lon@rda-Longitude on the
Earth; the arc of a pamllel, or the angle al the
pcle, between the prime meti]an and the
meridian of a ~int on the Earth.