C. Sat Systems and Fundamentals

Question 1

What are the three segments of a basic sat communication system?

Answer 1

1. Control segment
2. Ground segment
3. Space segment

Question 2

What are the two different types of payload?

Answer 2

Transparent -
Regenerative -

Question 3

For a communication link, what are the two important metrics defining the performance of the uplink and dowlink?

Answer 3

uplink - EIRP
downlink - G/T - Receiver gain over system noise temperature

Question 4

What are the four components of the system noise temperature?

Answer 4

T_ant + T_feed + T_LNA + T_rec

Question 5

Why is frequency downconverting used at the input of the communication system?

Answer 5

To increase isolation between the uplink and downlink - onboard signal processing and associated signal leaks wont impact link performance