Install guide

ARMY TM 5-6675-308-34
MARINE CORP5 TM 08837A-34/2
R
RESOLVER
– Senses synchro error signal and
drives torquer to remove angular orientation
difference between stable element and vehicle.
S
SPHEROID – An earth spheroid model used for
computing geodetic positions. There are seven
spheroid systems which PADS can accommo-
date. These are:
(1) Clarke 1866
(2) Clarke 1880
(3) International
(4) Bessel
(5) Everest
(6) Malayan
(7) Australian Net
STABLE ELEMENT
- Part of inertial measure-
ment unit that contains gyros and accelerome-
ters,
SYNCHRO - A device that senses any differences
in angular orientation between the stable ele-
ment and the vehicle,
T
TARGET SET
- A target, usually mounted on a
tripod, marking the distant end of an orienting
line; usually capable of being lighted so that the
orienting line may be viewed at night.
TWO-POSITION AZIMUTH TRANSFER – A
method whereby PADS lays out an azimuth
(orienting) line by taking departure from one
point, driving the utility truck to a second point,
marking the second point, and automatically
computing the azimuth from first to second
point.
TORQUERS – Motors that process the gyro axes
to maintain the stable element in a locally level
north-point attitude.
U
UPDATE – As applied to PADS, a correction of
PADS position or azimuth data. The correction
is a transfer of position and azimuth data from
that which has been accurately determined by a
higher order survey, such as celestial,
UTM – Universal Transverse Mercator – the
name of a grid system where meridians (longi-
tude lines) and parallels (latitude lines) of the
earth are represented on a plane in the same
manner as a rectangular coordinate system.
Z
ZERO-VELOCITY CORRECTION – A method
by which PADS navigating errors are minimized.
With the vehicle stopped, the PADS computer
checks to see if the system calculates a stop, or is
indicating movement. If movement is being indi-
cated, the computer performs a biasing proce-
dure to cause the system to indicate a stop. The
biasing computation is then used to correct navi-
gation data computed since the previous correc-
tion or update.
ZONE NUMBER – The number assigned to UTM
to identify each of the 60 UTM zones (each 6° of
longitude). Zones are numbered consecutively
eastward from the 180th meridian.
SECTION II. NONSTANDARD ABBREVIATIONS
A/D – Analog-to-digital
D/R – Digital-to-resolver
CDU – Control and display unit
D/S – Digital-to-synchm
COMP – Computer
EIR – Equipment improvement recommendations
CPU – Central processing unit
ENT – Enter
CUCV – Commercial utility cargo vehicle
HMMWV - High-mobility multipurpose wheeled
CUV – Commercial utility cargo vehicle
vehicle
D/DC – Digital-to-dc
HUM – High-mobility multipurpose wheeled vehicle
DMA – Direct memory access
ID – Identification
Glossary 2 Change 5