MTS Flashcards
MTS Components
HCU ACI panel Rotor Overspeed and MTS switch assembly SO Laser Switch Nose mount platform, turret mounting plate, turret unit Boresight module (maintenance only) MTS electronic unit (EU) Power converter unit (PCU) VCR/DVR
LRD characteristics
Laser Range Finder/Designator
Type: Yttrium-Aluminum-Garnet (Nd:YAG)
Wavelength: 1064 nm
Class: 4
Cannot see on NVG’s or FLIR
LTM characteristics
Laser Target Marker
Type: Diode
Wavelength: 860 +/- 20 nm
Class 4
Can see on NVG’s and FLIR
Continuous, fast blink, slow blink
ELRF characteristics
Eyesafe Laser Range Finder
Type: Optically pumped Erbium-Glass
Wavelength: 1540 nm
Class: 1
Midwave IR sensor wavelengths
3000-5000 nm
Visible DTV camera (2 of them)
400-700nm
One (“Wide”) with fixed optics for wide/ULTW
One (“TGT” targeting) with varying optics
LLTV Camera
700-900nm (near IR), uses same optical path as DTV
LOS stabilization and gimble movement
Stabilized by gyroscope and image motion compressor (IMC)
Torque motors drive the gimbles: two for elevation and one for azimuth.
Elevation +20 to -105 degrees
360 degrees of azimuth
MTS Electronics Unit
Interfaces with HCU
1553 data bus, AVT, gimbal drive, video processing, mode control, symbol functions
Level
Brightness/”black bias”
sets black bias by adjusting temperature window the MTS senses
Gain
Contrast
controls temperature range for a given level
varies temperature window discrimination from 1.5 degrees C (high gain) to large window of 34 (low gain)
Three Automatic Processing Modes
RAY -Rayleigh
LIN - Linear
LAP - Local area processing (usually preferred)
RAY
Rayleigh
similar to LIN, but shows more contrast in darker tones
LIN
Linear
sets gain/contrast and brightness/level to make use of dynamic range of display, affecting all areas of the image EQUALLY
LAP
Local Area Processing
Evaluate contrast patterns on entire display, adjusts gain/contrast and level/brightness to tailor differently on different parts of the display
Polarity
White hot/black hot
Warm objects are white in white hot and black in black hot
NOHD
Nominal ocular hazard distance - distance from operating laser at which radiant exposure is equal to the MPE (max permissible exposure)
Eye:
LRD: 39,077.2 m
LTM: 314.84 m
ELFR: 0 m
NUC
Non uniformity correction
1-pt: pixel response at one temperature
2-pt: various temperatures to be collected
PIM/PRF
pulse interval modulation-code requires a keyword
pulse repetition frequency
Laser armed
-129 to +123 degrees azimuth
+10 to -25 elevation
Masked everywhere else
Modes
Stow Slew Point Cue Point Scan Auto track Forward Pointing Offset from forward Off set from Auto-track Rate Boresight
Stow
MTS LOS at position that protects MTS turret windows; video reduced to min gain and level
Slew
TU controlled via slew buttom
Cue Point
lat/long coordinates commanded by mission avionics (to target on tactical display)
Point
MTS directed to fixed location on earth’s surface
Scan
move in predetermined pattern
AVT mode
Automatic video track
slave MTS TU based on movement of object
Offset AVT
LOS remains at offset position from AVT
Forward pointing
LOS along front to back axis of helo
Offset from forward pointing
LOS may be directed to a position offset some number of degrees from forward
Rate mode
MTS TU move at a constant rate
GIP
EGI data valid
WOW
MTS powered and looking below horizon.
MTS nomenclature
AN/AAS-44C
Safety fan
Remote designator outside of +/- 30 degrees of aircraft heading
Podium Effect
Blocked Reflection. When the seeker is looking for scattered laser energy, it must be able to see the reflecting surface. When a laser designates a surface that the seeker cannot see, the reflections are blocked
CCM
A counter-countermeasures (CCM) feature within the missile is
available. This feature allows the missile to overcome suspected active electro-optical countermeasures being
used within the target area. The feature should only be used when active electronic counter-countermeasures
(ECCM) is known to be deployed in the target area.
- Because it may an adverse impact on missile performance.
Backscatter
laser energy scattered back in the direction of the seeker by an obscurant. Since backscatter energy competes with the reflected energy from the target, a seeker may attempt to lock onto the obscurant rather than the target.
