Secondary Surveillance Radar

Question 1

What is :
1-De-Fruiting
2-Garbling
How is:
3-info defruited
4-garbling error removed

Answer 1

1-a/c Transponder interrogated by 2 ground stations at same time and replies to both stations, station may receive a reply meant for another station
2-a/c less than one nm apart appearing as one target
3-Unwanted replies(fruit) are removed by de-fruiting circuits
4-removed by killer circuits in decoder equipment

Question 2

What is the spacing between mode B and C interrogator pulses

Answer 2

17 microseconds and 21 microseconds

Question 3

What is the max range for SSR

Answer 3

200nm