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Revision Flashcards

1
Q

What is ISTAR?

A

Timely and accurate information given to a force commander. As a maritime nation the protection of sea lanes are of paramount importance.

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2
Q

What is the difference between ISR and ISTAR?

A

ISR is strategic and operational

ISTAR is tactical level

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3
Q

What are the differences between PAS and RPAS?

A

Crew in cockpit
SA
Emergencies
Weapons capabilities

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4
Q

What is the main infastructure associated with RPAS control?

A 
Ground control station
Fiber optic cable 
FSST (fixed site satellite terminal) 
Satellite
RPAS
Ground data terminal
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5
Q

What are the two elements associated with RPAS control?

A

Launch and recovery element

Mission control element

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6
Q

What is the main advantage the reaper has over other EO/IR platforms?

A

It has weapon capabilities

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7
Q

What is the main disadvantage of the EO comms suite on reaper?

A

It only has 1 radio

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8
Q

What are the main ISR platforms

A

Defender
Shadow
Reaper
P8

NDISR

F35
Typhoon

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9
Q

What happens if an RPAS system loses link?

A

The system will carry out pre set drills. That could be holding circles, continuing on route, returning home etc. This will depend on what part of the mission you’re on and what you programme

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10
Q

What areas of the EM spectrum does EO/IR work in?

A

Visible and IR

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11
Q

What are the environmental factors which effect EO performance?

A

Sun - blinds or shadows
Visibility - dust/sand can scatter light from refraction
Precipitation - causes scatter of light from refraction
Cloud - can cause shadows, you can’t see through a thick cloud
Fog - dense particles so you can’t see through it. May also cause scatter from water particles

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12
Q

What are the environmental factors that effect IR performance?

A

Sun - can cause thermal scaring

Visibility - dust/sand can scatter light from refraction

Precipitation - Can absorb IR energy and cause attenuation, rain can cool the background and make thermally significant objects stand out

Cloud - can cause shadows, you can’t see through a thick cloud

Fog - Obscures the IR camera, hot spots may be visible through the fog

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13
Q

What property of an object makes it appear on an IR sensor?

A

It’s emissivity

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14
Q

What is the relationship between emissivity and reflectivity

A 
Emissivity = 1 
Reflectivity = 0
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15
Q

What is meant by ‘thermal crossover’?

A

Plus or minus 1 hour of sunset or sunrise thermal crossover can occur.

This phenomenon can cause a lack of contrast in the picture as radiating temperatures are the same due to the specific heat capacity of different materials

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16
Q

What can the operator select to help with thermal crossover?

A

Change the polarity

From white hot to black hot or vice versa

17
Q

What are the different parts of an EO/IR sensor

A 
Gimble
Turret 
Master control unit
Controls
Display
Recorder 
Downlink
18
Q

What is the function of a gimble?

A

Housing for camera to stow
Stabilize, steer and point
360 degree azimuth
Elevation limited by housing and NADIR

19
Q

What is in a Turret?

A 
IR camera 
EO wide 
EO narrow
Laser range designator
Laser target marker
20
Q

What is a laser target marker

A

Used to mark areas using near IR region and can be seen using NVG

Sparkle or illuminator

21
Q

Laser range designator function

A

Used for weapons guidance matched with similar PRF.

Gives accurate position and altitude info

22
Q

Label the diagram

A

Top small slot - Laser target marker
Right camera - EO narrow
Left camera - EO wide
Opaque camera - IR camera

23
Q

What is the features of an IR camera

A 
Thermal imaging sensor 
Shades of grey display
Black or white hot 
Uses 3-5 micron range 
Non- linear zoom
24
Q

Different EO camera types

A

EO wide
EO narrow
Daylight TV camera (with linear or non linear zoom)

25
Q

What is the function of a master control unit

A

Controls, processes and manipulates data from sensor payload

Interfaces with other aircraft systems

Interfaces with operator control unit

26
Q

What is the function of controls

A

Operator control unit - operates turret functions (not steering)

Joystick - controls steering

Hands control unit - mixture of both

27
Q

What are the different types of display?

A

Master monitor - displays video in command

Repeater displays - repeats display of master monitor

28
Q

What are the different types of recorders

A

Can be built into the MCU, automatic recording

Can be a manual operator controlled recorder

Used for post flight analysis

29
Q

What is the function of a downlink

A

Video is encrypted and streamed to ground stations

Increased SA for CAOC, ground commander or supported Unit

Land (3 decks)

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