Key Topic 98: GPS

Question 1

3-98P1: Global Positioning Service (GPS) satellite orbiting altitude is:

A. 4,686 miles.
B. 24,184 miles.
C. 12,554 miles.
D. 247 miles.

Answer 1

C. 12,554 miles.

Question 2

3-98P2: The GPS transmitted frequencies are:

A. 1626.5 MHz and 1644.5 MHz.
B. 1227.6 MHz and 1575.4 MHz.
C. 2245.4 and 2635.4 MHz.
D. 946.2 and 1226.6 MHz.

Answer 2

B. 1227.6 MHz and 1575.4 MHz.

Question 3

3-98P3: How many GPS satellites are normally in operation?

A. 8
B. 18
C. 24
D. 36

Answer 3

C. 24

Question 4

3-98P4: What best describes the GPS Satellites orbits?

A. They are in six orbital planes equally spaced and inclined about 55 degrees to the equator.
B. They are in four orbital planes spaced 90 degrees in a polar orbit.
C. They are in a geosynchronous orbit equally spaced around the equator.
D. They are in eight orbital planes at an altitude of approximately 1,000 miles.

Answer 4

A. They are in six orbital planes equally spaced and inclined about 55 degrees to the equator.

Question 5

3-98P5: How many satellites must be received to provide complete position and time?

A. 1
B. 2
C. 3
D. 4

Answer 5

D. 4

Question 6

3-98P6: What is DGPS?

A. Digital Ground Position System.
B. A system to provide additional correction factors to improve position accuracy.
C. Correction signals transmitted by satellite.
D. A system for providing altitude corrections for aircraft.

Answer 6

B. A system to provide additional correction factors to improve position accuracy.