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MIL-HDBK-850
a pWC6ntag6; r6f}eCfWfy, The term genera)fy
Alrbome Control (ABC) Sy6teM-A survey
system for horizontal aml vertkal control surveys
refers :0 energy witmn a specifii frequency
range, ae the visible spectrum. Ila most frequent
irwoMrg ebctrorrwgnatic distance application is to the Iighl reflected by a celealial
measurements and horizontal and vertical angle body.
measurements hmm two or more kmwrr Posifiins
to a ftelkopter hoverfng over tfte urWwwn Albrsrrt conical equal.area map
PoshIon. Tha elavetiirt of the unknown poefriirt ts pro)acllon-An equal-area projection ot fhe
determined by fha use of a apaoiaf phsmb he mrrhaf type, on which lhe maridiirw are slraQhf
cable. lines Ihal meet in a common point beyond tha
limits of the map, end fhe parallels are cersmntrk
Airborne Proflla Racordar (APR%See clrcfas whose cenfer Lsat the point of Intaraaclion
Terrahr Profile Recorder. of the mwidiirrs. Meridians and parellsfa
int6r%6ct al right angles and the arcs of bngifude
.eIrborna ●leotronfc survey control— abng any givan parallel are 01 equal Iangfh. The
Control aurvay% amor?@shed by efecfronlc parallels are spaced to retain tha cot’!dlilon of
maana horn an alrlmme vehicle or pfattorm, such Wual 8raa. m fwO W~cf~ PWaflels, the arce Of
as hiren and shoren.
Iongttuct.e are reprasersfed In their true length.
Befween the selected parallels fhe scale along
afrborne
desi~nad
tencilng model-A specially
assaun rrmdef for use In briefing
fhe meridians
beyond them,
will be a trifle 100 large. and
100 small,
alrfwme troops and supperf paraonnel. These
models emphasize the aspects of objacfs as
seen from the air rather than from the Qround,
alfwmln
making
(albumen) process”—A process of
photolilhogrephic press plates utifizing
bichromaled albumin as fha photosensitive
ahwey+JCS) A comrol area or portion thereof
established in the form of a rnrrtiar marked with
mating, and requiring a true negative
the prinfing plate. See also plate,
10 make
radb navigational aids.
Aldls algnallng lamp-A signaling lamp used
Ah’y ●pherold (elllpsold)-A reference
e[iiisdd used in Great Britain and having fhe
in some cases for night obsewalions
stations in triangulation.
of distam
following dimensions: samimejor exis—
6,37T.563.3S6
6,356,256.910
meters:
meters:
aemiminor azia—
and lhe flatrenlng or
alerte-An
satellites,
ephemeris prepared lor one or more
predicting rise and set times referr~ to
elfiOfiCltV-1/299 . .3249646. universal
elevation
lime coordinated, maximum angle of
above the observer’s frorizon, a-rid
Aky theory ot laoatasy-The lheory that fhe azimuth from fhe observer. Used fo identity
mnfinenfe and Isfands are resflng hydroelallcally $Pecific aatefffie Passes. See also look anUlas.
on hahly pfastic or fiquid maferlal, vflth roots or
pmjecttons penatratlng fhe inner material of the akorifhm-A etatemenl of the steps to be
Earlh. lust as icebems extend downward into the followed in the SOIUtbn of a moblem.
w“ater; The greeter tf% elevation; fhe deeps; the
penetration. II has been celled the roota of rWderYe-The pan of a surveying Instrument
mountaht theory, and has the support of whkh consists of a sighllng dev’ke, with index,
some gaofegl~s. See also Prmtt-Hayford ad reading or MccmJ@r accessories. See also
theory of Iaostesy. paapalght alldasfe; pendulum alldada;
pholoalldade; Ieleacoplc allrtada.
Altotf aqual-araa map pro)ecflon— A
Lamberl equal-area azlmuihal projection or e JIllgnmant (allnemem)-1. (cartography)
hemisphere ctmvertad inso a map projecfiin of Representation of a road, railway, etc., on a map
fhe emire sphere by a manoulafion suggested or than in relation to surrounding tpographlc
by Alfoff. H is a projactbn bounded by an elllpse detail. 2. (general surveying) Tha pfacemem or
in wtrlch lhe fine representing the Equator (major location of pOlnfS abng a stmfght Ilne. 3.
axis) Is doubla the length of the llne representing (highway and mule euweYin9) The Wound Plan
the cenlraf meridian (minor axis), showing the direcffon (cemer line) of the mute to
be followed, as distinguished from proflla,
albedo-The rafio of radiant energy refiected to which shrsws the vamcal elamanf.
fhaf received by a surface, usually expressad as
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