NVS Flashcards
(43 cards)
What are the two types of night vision devices available to crew members?
Image Intensifiers (I2) and Thermal Imaging (FLIR)
What is the purpose of Thermal Imaging systems?
To provide an IR image of a scene by detecting heat
What is the advantage of Thermal Imagers over Image Intensifiers?
No light is required to operate a thermal imager
What atmospheric elements affect the composition or density of the atmosphere and, therefore, affect IR signal transmission?
Moisture, Fog, Dust, Haze, and Smoke
What two factors create most of the Parallax Effect?
Angular difference between the M-PNVS and the HDU, and the distance from the item being observed. (Close-in at a 90 degree angle is the worst)
What function does the M-PTUR Receiver perform?
Converts infrared (IR) images to 16 analog outputs to the FLIR processor
What is the function of the M-PECA?
Amplifies azimuth and elevation commands and sends them to the drive motor to move the turret
What are the three types of Built-In-Tests (BITs)?
Start-Up (S-BIT), Continuous (C-BIT), and Initiated (I-BIT)
What causes frozen video?
Loss of video link communication
What does loss of bus communications results in?
Affected turret (M-TADS/M-PNVS) will move to fixed forward in 5 seconds
What causes cloud shifting?
Dynamic Range Compression and IR detector non-uniformity
How is the M-PNVS turned on?
WPN-UTIL Page
Automatically if initial power came from the APU Manually if using an AGPU
What is FLIR polarity?
FLIR polarity is a shade reversal effect applied to the FLIR in order to view an item more clearly. The resulting selection is referred to as “White Hot” and “Black Hot”.
How can a crew member tell what polarity their FLIR system is using?
Look at the sky (Clear Sky)
Sky Dark - White Hot
Sky Light - Black Hot
How can the crew member using the M-PNVS bring it out from the stowed position?
Placing the NVS Mode Switch into the NORM or FIXED position
What are the four considerations for FLIR optimization?
FLIR must be cooled
Scene rich in detail
Select a polarity
Only one control should be adjusted at a time
Which should be optimized first, the FLIR or the IHADSS?
IHADSS
What is definition of FLIR optimization?
Using a combination of level and gain to achieve the best detail
What is the primary objective of FLIR adjustment?
Obtaining the highest possible picture quality for the flight environment (obtaining a quality image).
What two things should crew members ensure before they optimize the FLIR?
Ensure that the “NVS NOT COOL” or “ FLIR NOT COOL” message is no longer present and that the “ACM” is OFF
When is an optimization required?
Required when the crew is going to use the FLIR for Flight, Laser Ops, and Weapons
What establishes the FOV of the M-PNVS?
Afocal Assembly
How can the crewmember in control of the M-PNVS
stow it?
Place the NVS Mode Switch to OFF
What symbology is always presented on the M-PNVS display?
Flight
