SATCOM Review

Question 1

What is the purpose of SATCOM?

Answer 1

To communicate between the aircraft and ground through most of the world

Question 2

What type of signal does SATCOM use?

Answer 2

Digital signal

Question 3

What are the three basic elements of SATCOM?

Answer 3

satellites
aircraft earth station
ground earth station

Question 4

Frequency of signal between Aircraft and satellite?

Answer 4

1.5-1.6GHz

Question 5

Can aircraft earth station communicate with ground earth station directly?

Answer 5

No, aircraft earth and ground earth must communicate with the satellite

Question 6

How many Inmarsat satellites are there?

Answer 6

4, latitude

Question 7

Inmarsat coverage falls off at this area?

Answer 7

The poles

Question 8

How many ground stations are there throughout the world?

Answer 8

10 ground stations

Question 9

What are some advantages of SATCOM?

Answer 9

Reliable comm
Less sensitive to environmental conditions
Secure
Low signal to noise
Multiplexing

Question 10

Disadvantages of SATCOM?

Answer 10

More complex
increased bandwidth
costly

Question 11

What characteristics does a Geosynchronous satellite have?

Answer 11

not moving from observer on earth

Question 12

Frequency of transmission from satellite to ground?

Answer 12

4-6GHz

Question 13

What type of wave and modulation is SATCOM?

Answer 13

continuous wave, differential modulation