TT & C

Question 1

What is the purpose of PRN-code?

Answer 1

Pseudo random noise is a digital method for determining the spacecraft position from the ground station

Question 2

What are the main roles of the ground station?

Answer 2

Transmitting commands to the spacecraft
Receiving telemetry data
receiving scientific data
receiving spacecraft health data
distributing the data to the appropriate parties

Question 3

In the TT and C and RF system diagram, why are there multiple modulators, demodulators, transmitters, and receivers?

Answer 3

To protect against component failures via redundancy

Question 4

In the TT and C and RF system diagram, what are the nodes between the OBC and the antenna?

Answer 4

antenna
duplexer
receiver/transmitter
IF mix
demodulator/modulator
diplexer
OBC

Question 5

What are the three methods of tracking a spacecraft

Answer 5

Interferometry -
Step Track
Predictive tracking

Question 6

What are the four methods of ranging a spacecraft

Answer 6

Doppler Tracking
Radar Tracking
Laser ranging
GPS