GPS Flashcards
1
Q
What are the three functional elements of GPS?
A
- Space Segment
- Control Segment
- User Segment
2
Q
What are the properties of the space segment?
A
- At least 24 satellites.
- Orbits at 20,200 km.
- Minimum of 4 satellites in 6 orbital planes.
- Each orbital plane inclined at angle of 55º to the equator.
- One orbit takes 12 hours.
3
Q
What are the two types of pseudo-random codes?
A
- Coarse acquisition code
- Precision P(Y) code
4
Q
How many satellites are required to determine a 2-D fix and a 3-D fix?
A
3 and 4 respectively
