GPS

Question 1

3 Components of GPS?

Answer 1

1. Space: Satellites (24 total) (6 orbital phases)
2. Control: Ground stations, master control station, monitoring stations
3. User: G1000, iPhone

Question 2

How does GPS work

Answer 2

Pseudoranging:
Distance and Time (Beam sends out to the plane, then back to us) (THINK DME) (1-2 satellites)

Trilateration:
-3 or more satellites give us a 2D position of where we are
-4 or more satellites give us 3D position of where we are (altitude)

Question 3

What is RAIM & Main Functions??

Answer 3

Receiver Autonomous Integrity Monitoring

2 Main Functions
1Baroult Detection (5 sattelites) (4 sats)
2. Fault Detection & Exclusion (6 sattelites) (5 sats)

*Baro aiding capability, brings these satellite requirements down one (us)