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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
Suspect
Potentially hostile target
26
Beanstalk
Check equipment for spurious tracks
27
Prelude
Reference point from which track positions are reported
28
Bent
System is inoperative
29
Sweet
Equipment working
30
Sour
Equipment not working efficiently
31
Cyclops
UAV
32
Assumed freind
Track potentially freindly
33
Freind
Freind
34
Neutral
Not supporting or opposing
35
Bandit
Hostile track with no authority to engage
36
Faker
Friendly acting as hostile
37
Joker
Friendly acting as suspect
38
HF frequencies
2 MHz - 30 MHz
39
VHF frequencies
30 MHz - 300 MHz
40
UHF frequencies
300 MHz - 3000 MHz (3 GHz)
41
What does Authentication do
Protects communication systems against fraudulent transmissions
42
When to authenticate?
``` Imposing or lifting emergency silence Transmitting blind When ordered to do so Validate a message of operational importance When in doubt ```
43
Types of reports
Battle Damage Assessment (BDA) Tactical Report Situation Report (SITREP) Join and Handover
44
Why do a BDA
Ground forces may not have access | More assets may be required to reattack if not effective
45
What is a Tactical Report
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
What is included in a SITREP?
Active or anticipated threats Recent hostile activity Any scheduled events Net participants and responsibilities
47
What is included in a Join message
``` Callsign ETA Serviceability Intentions Capabilities ```
48
What is included in a Handover Message
``` 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
What is AIS
Automatic Identification System Identifies and locates vessels by exchanging data with other ships, AIS base stations and Satellites
50
What is AIS fitted to?
International ships over 300 tonnes Non international ships over 500 tonnes All passenger ships of any size
51
What does AIS use to transmit data?
SOTDMA Self-Organised Time Division Multiple Access No control station and uses GPS to assign slots
52
Used for AIS?
Fishing fleet monitory and control Maritime security SAR Cargo ship tracking
53
What is IBS
Integrated Broadcast service Provides real time data from multiple sources in theatre and on a global scale
54
What is SSSB
Ship shore ship buffer Is an interface between link 1 and link 11
55
What are the limitations of SSSB?
Not all link 11 data can be translated to link 1 This requires back up from voice communications
56
What are ELNOTS?
ELINT Notations Unique 5 character alphanumeric identifier for a specific emmiter
57
What is the first Character in ELNOTS?
Represents the platform and originating block
58
What is the last character in ELNOTS?
Represents its family relationship
59
What are the Red letters?
A-H
60
What are the Blue letters?
M-P
61
What are the red first character letters
``` A-airborne B-ground C-ship F-ground/ship T-temporary ```
62
What are the blue first characters
``` M-airborne N-ground O-ship P-ground/ship W-temporary ```
63
Other first characters
``` G-datalinks I-comair J-ATC K-comnav L-unknown ```
64
Last characters
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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