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Hydraulics > NVS > Flashcards

NVS Flashcards

1
Q

what are the 2 types of night vision devices available to crew members?

A

image intensifiers(I2), thermal imaging (FLIR)

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2
Q

what is the purpose of thermal imaging systems?

A

to provide an IR image of a scene by detecting heat

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3
Q

what is the advantage of thermal imagers over image intensifiers?

A

no light needed to operate the thermal imager

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4
Q

what atmospheric element affect the composition or density of the atmosphere and, therefore, affect IR signal transmission?

A

moisture, fog, dust, haze, smoke

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5
Q

what two factors create most of the parallax effect?

A

angular difference between the PNVS and the HDU, and the distance from the item being observed

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6
Q

what light spectrum does the image intensifier see?
What light spectrum does the thermal imaging system see?

A

visible and near IR
Far IR

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7
Q

What is IR crossover?

A

Phenomenon that occurs twice a day where the temp conditions cause a loss of contrast between adjacent objects

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8
Q

What is atmospheric condition?

A

When FLIR exceeds eye capability, “see” through obscurations

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9
Q

What is atmospheric transmission?

A

IR signal is affected by obscurations that affect air density (ie overcast, rain) causing poor quality FLIR image

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10
Q

What function does the M-PTUR receiver perform?

A

Converts infrared images to 16 analog outputs to the FLIR processor

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11
Q

What is the function of the M-PECA?

A

Amplifies azimuth and elevation commands and sends them to the drive motor to move the turret

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12
Q

What are the three types of BITs?

A

SBIT, CBIT, INIT (start up, continuous, initiated)

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13
Q

What is the function of the M-PAZD

A

Moves the turret to the commanded LOS

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14
Q

How many detector array output lines of video?

A

960 lines, video processor can only display 811, so there are 149 in reserve

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15
Q

What material is the mptur window/lens made of?

A

Geranium crystal

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16
Q

What conditions does the anti-ice turn on?

A

41 degrees F or 5 C, moisture in the air

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17
Q

Purpose of the video processor?

A

Collects video from FLIR, converts it to analog, and sends it to the correct source

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18
Q

The SBIT for PNVS & TADS starts when?

A

60sec after power on, takes 30 sec

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19
Q

What causes frozen video?

A

loss of video link communucations

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20
Q

What does loss of bus communications results in?

A

Affected turret will move to fixed forward in 5 sec

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21
Q

What causes cloud shifting?

A

Dynamic range compression and IR detector non-uniformity

22
Q

How is the PNVS turned on?

A

WPN UTIL page automatically if APU power up, or manually if AGOU power up

23
Q

What is FLIR polarity?

A

A shade reversal effect applied to the FLIR in order to view an item more clearly
White hot, black hot

24
Q

How can a crew member tell what polarity their FLIR system is using?

A

Look at the sky, dark-white hot, light-black hot

25
Q

How can the crewmember using the PNVS bring it out from the stowed position?

A

Placing the NVS select switch into NORM or FIXED position

26
Q

What are the 4 considerations for FLIR optimization?

A

FLIR must be cooled
Scene finch in detail
Select polarity
Only one control should be adjusted at a time

27
Q

Which should be optimized first? FLIR or the IHADDSS?

A

IHADSS

28
Q

What is the definition of FLIR optimization?

A

Using a combination of level and gain to achieve the best detail

29
Q

What is the primary objective of FLIR adjustment?

A

Obtaining the highest possible picture quality for the flight environment

30
Q

What two things should crew members ensure before they optimize the FLIR?

A

Ensure that the NVS not cool, or, FLIR Not cool messages are no longer present, and ACM is off

31
Q

When is an optimization required?

A

When the crew is going to use the FLIR for flight, laser ops, and weapons

32
Q

What establishes the FOV of the M-PNVS?

A

Afocal assembly

33
Q

How can the crewmember in control of the PNVS stow it?

A

Place NVS mode switch off

34
Q

What symbology is always present on the PNVS display?

A

Flight

35
Q

What does the NORM position provide the pilot?

A

Provides the PNVS video that is slaved to the pilots helmet mounted display

36
Q

What does the fixed position provide the pilot?

A

Provides the pilot with a PNVS that is fixed forward 0 degrees in azimuth and -4.9 degrees in elevation

37
Q

The TADS is divided into what two major sections?

A

MDSA
MNSA

38
Q

What major components are located within each section of the TADS?

A

MDSA-DTV,LST,LRFD
MNSA-FLIR

39
Q

What must crews ensure on preflight for TADS operation?

A

Covers OFF - MDSA cover, MNSA cover, boresight module cover

40
Q

Why is the TADS resolution not as good as the PNVS?

A

TADS is not designed for flight, it is designed for targeting
2.3 vs 1.5

41
Q

When is the TADS not an available selection as a sensor?

A

When the NVS mode switch is OFF

42
Q

If the CPG is using the TADS as a sight and it is required for NVS flight, what must the CPG do to gain control of the TADS as a sensor?

A

Place the NVS mode switch to norm or fixed

43
Q

If either crewmember selects TADS from a sight to a sensor, what image will be displayed on the HDU?

A

FLIR, Wide FOV

44
Q

What symbology will be displayed on the HDU when using TADS as a sensor?

A

Flight symbology

45
Q

What is the fixed field of view of the TADS when used as a sensor?

A

30 x 40

46
Q

What is the slew rate of the TADS?

A

60 degrees per second

47
Q

What are the two stow positions for the TADS when not in use?

A

TADS stow 180
TADS alternate stow 0 azimuth, 0 elevation

48
Q

Which crew member can stow TADS?

A

CPG

49
Q

How can a crewmember select the opposite sensor?

A

NVS mode switch other than OFF, NVS select switch to selected sensor

50
Q

Can the pilot always select TADS from the COG?

A

Yes

51
Q

Can the CPG select PNVS from the pilot?

A

Yea

52
Q

If both crew members are using a sensor, what happens if either crew member selects NVS select switch on the collective flight grip?

A

Sensor swap

Hydraulics (15 decks)

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