IFF/ FLIR

Question 1

IFF mode pulse spacing

Answer 1

Mode. Spacing use
1. 3uS. Military ID
2 5uS. Military ID secure
3/A 8uS. Milt/ civi ID
C 21uS. Auto alt
D 25uS Future use
4 Pseudo random Milt secure
5 crypto Milt secure
S random TCAS

Question 2

Function of transponder in IFF

Answer 2

Incoming interrogation pulses are decoded by the receiver and the coded reply set up on the control panel is triggered and sent back to the transmitter module

Question 3

IFF emergency codes

Answer 3

7700 emergency
7600 radio failure
7500 Hijack

Question 4

Purpose of FLIR electronics unit

Answer 4

Converts electrical signals signals representing IR temperature levels to a form suitable for display

Question 5

Purpose of video recoding system

Answer 5

Post flight analysis

Question 6

Advantages of thermal imaging IR sensors

Answer 6

Passive
Not easily deceived by camouflage
Doesn’t require light

Question 7

Explain thermal shadow

Answer 7

Caused by areas being shaded from direct sunlight radiation

Question 8

Why is conventional glass not used in IR optics

Answer 8

Glass is opaque to IR wavelengths