Optional Equipment
LEO
−
II
−
A5 Observation System
CSP
−
902RFM207E
−
1
ROTORCRAFT FLIGHT MANUAL
MD900 (902 Configuration with PW 207E)
Original
10
−
74
FAA Approved
Reissue 2
PART VII
SYSTEM DESCRIPTION
The LEO-II-A5 Observation System consists of a Stabilised Turret Assembly (STA),
Control Electronics Unit (CEU) and Laptop Control Unit (LCU).
Stabilized Turret Assembly:
The STA consists of three sub units namely the Stabilised Turret Unit (STU),
Sensor Pack Assembly (SPA), and the Front Shell Assembly.
The STA may be mounted to either the universal mount or the EPMS (Ref.
Figure 10-26).
Stabilised turret unit (STU)
The STU is a four-axis design, gyro stabilised in outer azimuth and elevation
and inner azimuth and elevation. The STU provides the remote movement
of the Sensor Pack Line-Of-Sight (LOS), corresponding to the centre of the
imaged scene, to any position within the Field-Of-Regard (FOR). The FOR
for the LEO-II-A5 Observation System is mech20 degrees to –105
degrees in elevation and a continuous 360 degrees in azimuth from the
look-ahead position.
Sensor pack Assembly (SPA)
The Sensor Pack contains the gyroscope, Sensor Control Electronics PCB,
Triple QWIP thermal imager with three fields of view optics, TV Zoom Camera
Assembly with a Three-CCD camera and 54X zoom lens, and a Dummy
Spotter TV Assembly in the standard configuration.
Front Shell Assembly
The Front Shell Assembly consists of an aluminium shell into which windows
are fitted to accommodate the optical paths of the various sensors of the Sensor
Pack Assembly. It also houses a desiccant holder, which eliminates moisture
built-up in the STA.
CONTROL ELECTRONIC UNIT (CEU):
The CEU houses all computing and control functions of the STA. It is the central
point of transfer for system signals, command, and data I/O. The CEU controls
power distribution and system timing. It implements software algorithms that
perform such tasks as the generation of overlay symbology and controlling the
menu-driven functions of the system. The CEU communicates with other system
modules through a serial data bus.
LAPTOP CONTROL UNIT (LCU)
The LCU is a lightweight laptop held unit by which control of the Observation
System is executed.
The Laptop Control Unit is held in place with a neck strap on the operator's
lap during flight. The Laptop Control Unit is used by the operator to steer the
STA and control the sensor fitted in the Sensor Payload Assembly.
Summary of Contents for MD900 Explorer
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