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with differeti roughness and ~t~fa. ‘II-W
acafferomeler la distinguished fmrn other radars
by its ebifhy to measure arr@fuda.
MIL-HDBK4350
●corto gensratlon-A two-dimanaionel
dispfsy with undarfaying tenain data pwlreyad to
appear ae if three-dimemsionaf. Normally, en
image c.mafsts of an cbfiiua view wffh
perapacfive.
●cenei matching area cormlator
(SMAC)-An elacfrooptical correlation ayslem
whwh uses photogmphii rsrterence material
mStChSd with OllbOSrd raaffirna scenes to
echteve ccmelation. The reference scene is
prepared from ramrmaiasance photegrapha and
is stored In the form d a photogrsphc
trans~rancy. The reference is ptscad eruund
the inner circumference of a drum that retatas at
e high engulsr vefcdy. The reference then
forms e continuous strip which modulates or
cheps the projactad image being fccused on if
by the optical system. The reaffime energy from
the ground within the fiafd-ef-view is spetisl~
modulabd by the trsnsmksivify ef the reference
transparency.
. .Schaimpflug ,,sondition.-The requirement
thet object, lens. and image p!arres intersecI in
a common line for sharp fetus in eny dkecl
projection system.
@chema-The description of the logical
afrucfure of en entire data base acwrdhg to a
conceptual model.
Schott baae-llne measuring epparetua—
A contecf, compensating base-line measuring
apparatus mrrrpmed of three psrsllal bars; the
middle bar of zinc, the outer bars of steal. One
and of each steel bar is free; the ohm end is
fastened to en end of the zinc bar, a different
end for each steel bar. The lengths of the bars
are so p~rtionad wilfr respect to their
coeffiiiarrts of thermal expansion that e
cerrsterrf d!atance is maintained between the
free ends of the sled bars.
sclntlllatlon—See srhlmmer.
sclasora lnveraOr—See PeaucelllOr
Inveraor.
acroan angle-(photogmphy) The angle
which the rowa of halftone dots make with the
verticel when right-reading. The engle is
measured clockwise whh O“ a! 12 o’cfock.
-.
Z25
●croon fng—See madrfng.
. . . .
scr*On-See4 ●raa pattern semen;
blangle ●crean; dot ecmwr; halftone
●craen; magenta contact screen.
scribed pleta-see scribed sheet.
ecrlbad sheet-A scribing aurfeca on whnh
the raproddion scribing has bean cempfeted.
Atae called scrlbad plate.
acrlber—An instrument hefdirrg a acribhg
point; used for scriling en coated plastics. Alse
called ●ngraveq gravec scrlblng
Instrument. See alas sngratmr
rectagraver; rlgld tripod ●ngrava~
ctrnight Ihre gmver; subdlvldor; ●wlvol
graver; turret graver.
sicriblng gulda-See guide.
scrlblng krstrumorrt-See scriber.
scribing points-Needles or btsdes in various
dmmelem or cress-saction shapes ground ❑nd
sharpened 10 prescribed dimensions. Used in
scribers for scribing on add plastics.
scribing—(JCS) A method of preparing a msp
or charl by cutting the tines into e prepered
mating. ~he pmcesa of preparing a negative
Aich can be rs+woduced by contact expesure.
Portions of e photographically opaque coating
ere removed from a transparent base with
spacielly designed tools.] Also called nsgatlve
scrlblng.
aee level contour-A contour fine delineating
peirrts at sea ievel.
ssa Ievsl datum of 192 S-See Nationel
Goodatlc VerZlcal cfatum of 1929.
sam Ievsf dstum—See msan sea Iaval.
sea lmrsl variation-sea level variea from
day to day, from month to month, end from yesr
to year. This verieIicm is aftrfbulad 10
meteorological renditions end ahoufd not be
mnfuaad with the lunar fiiea.
ses lsvsl—The height of the surface of the
sea at any time. Sss also Ideaf sea Iaval;
mean aaa hfbl.