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EW Advanced Theory > Week 3 Theory > Flashcards

Week 3 Theory Flashcards

1
Q

What is SAR

A

Synthetic Aperture Radar

Is a coherent, airborne, sideways looking radar that uses straight flight paths to create an extremely large antenna electronically

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2
Q

Two types of SAR imagary

A

Swath

Spot

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3
Q

What is a Swath scan

A

Aircraft flies at a constant velocity in a line and transmits 90 degrees to the aircraft.
Multiple swaths make a strip

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4
Q

What is a spot scan?

A

Uses beam steering to illuminate a target area for a longer period reducing radar shadow

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5
Q

SAR system constraints

A

Lots of computing power needed
Have to fly in a straight line
Target motion causes blurring

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6
Q

What is Coherent Change Detection

A

Comparison of SAR imagery from the same geometry collected at different times

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7
Q

What can CCD be used to see

A

Sand movement
IED ground disturbance
BDA

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8
Q

What is ISAR

A

Inverse Synthetic Aperture Radar

Relies on target motion to create and image

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9
Q

What is an MTI radar

A

Moving Target Indicator Radar

Provides a clear display by removing clutter caused by stationary or slow moving targets

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10
Q

What is a Ground MTI

A

Looks specifically at slower targets and used to track, detect and locate moving vehicles

Can be overlayed onto SAR

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11
Q

What platforms have SAR capabilities?

A

E-8 Joint STARS
Reaper
Watchkeeper
P-8

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12
Q

What is a Tactical Data Link?

A

Carries data close enough to REAL TIME to be useful in a tactical situation

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13
Q

How is TDL propagated

A

Radio
Landline
SATCOM
Microwave

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14
Q

What are the 3 TDL systems?

A

Point to point
Broadcast
Netted

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15
Q

3 TDL modes of opperation

A

Simplex-one way
Semi duplex-two way, non simultaneous
Duplex-two way, simultaneous

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16
Q

Link 11 standards codes

A

Mil-std 6011

STANAG 5511

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17
Q

Link 16 standards codes

A

Mil-std 6016

STANAG 5516

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18
Q

What is Link 11 also known as

A

Alligator

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19
Q

What does Link 11 require

A

Needs a Network Control Station and Participating units

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20
Q

Link 11 limitations

A

Loose NCS you loose data

More people on the net means slower cycles

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21
Q

What is Link 16 also known as

A

Timber

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22
Q

What improvements does Link16 have compared to Link 11

A 
Nodeless-Time Division Multiple Access
Jam resistance - freq hopping
Improved security
Semi-Duplex
J series messages
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23
Q

What are cycles divided into

A

Epochs
Frames
Time slots

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24
Q

Ping pong

A

Exchange of info on the net

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25
Q

Suspect

A

Potentially hostile target

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26
Q

Beanstalk

A

Check equipment for spurious tracks

27
Q

Prelude

A

Reference point from which track positions are reported

28
Q

Bent

A

System is inoperative

29
Q

Sweet

A

Equipment working

30
Q

Sour

A

Equipment not working efficiently

31
Q

Cyclops

A

UAV

32
Q

Assumed freind

A

Track potentially freindly

33
Q

Freind

A

Freind

34
Q

Neutral

A

Not supporting or opposing

35
Q

Bandit

A

Hostile track with no authority to engage

36
Q

Faker

A

Friendly acting as hostile

37
Q

Joker

A

Friendly acting as suspect

38
Q

HF frequencies

A

2 MHz - 30 MHz

39
Q

VHF frequencies

A

30 MHz - 300 MHz

40
Q

UHF frequencies

A

300 MHz - 3000 MHz (3 GHz)

41
Q

What does Authentication do

A

Protects communication systems against fraudulent transmissions

42
Q

When to authenticate?

A 
Imposing or lifting emergency silence
Transmitting blind
When ordered to do so
Validate a message of operational importance 
When in doubt
43
Q

Types of reports

A

Battle Damage Assessment (BDA)
Tactical Report
Situation Report (SITREP)
Join and Handover

44
Q

Why do a BDA

A

Ground forces may not have access

More assets may be required to reattack if not effective

45
Q

What is a Tactical Report

A

Used to pass on tactical info on hostile forces

All reports given a serial number and use Alpha numeric code to state activity type

46
Q

What is included in a SITREP?

A

Active or anticipated threats
Recent hostile activity
Any scheduled events
Net participants and responsibilities

47
Q

What is included in a Join message

A 
Callsign
ETA
Serviceability
Intentions
Capabilities
48
Q

What is included in a Handover Message

A 
Time off task
Current task
Issues encountered or expected
Other call signs operating
Comm nets/data links
Weather
Departure point and Flight level
Threats
49
Q

What is AIS

A

Automatic Identification System

Identifies and locates vessels by exchanging data with other ships, AIS base stations and Satellites

50
Q

What is AIS fitted to?

A

International ships over 300 tonnes
Non international ships over 500 tonnes
All passenger ships of any size

51
Q

What does AIS use to transmit data?

A

SOTDMA
Self-Organised Time Division Multiple Access

No control station and uses GPS to assign slots

52
Q

Used for AIS?

A

Fishing fleet monitory and control
Maritime security
SAR
Cargo ship tracking

53
Q

What is IBS

A

Integrated Broadcast service

Provides real time data from multiple sources in theatre and on a global scale

54
Q

What is SSSB

A

Ship shore ship buffer

Is an interface between link 1 and link 11

55
Q

What are the limitations of SSSB?

A

Not all link 11 data can be translated to link 1

This requires back up from voice communications

56
Q

What are ELNOTS?

A

ELINT Notations

Unique 5 character alphanumeric identifier for a specific emmiter

57
Q

What is the first Character in ELNOTS?

A

Represents the platform and originating block

58
Q

What is the last character in ELNOTS?

A

Represents its family relationship

59
Q

What are the Red letters?

A

A-H

60
Q

What are the Blue letters?

A

M-P

61
Q

What are the red first character letters

A 
A-airborne
B-ground
C-ship
F-ground/ship
T-temporary
62
Q

What are the blue first characters

A 
M-airborne
N-ground
O-ship
P-ground/ship
W-temporary
63
Q

Other first characters

A 
G-datalinks
I-comair
J-ATC
K-comnav
L-unknown
64
Q

Last characters

A

Z-unique emission
A-W-1st to 23rd family members
X-unknown, yet to be decided
Y-ambiguous emitter, could fit two or more in a family

EW Advanced Theory (3 decks)

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