Revision Test 3

Question 1

In a vertical axis gyro at the South Pole

Answer 1

Drift and topple due to earth rate rotation will be zero

Question 2

In a horizontal axis gyro at the South Pole

Answer 2

Drift will be max and topple will be zero

Question 3

Ac with latitude compensated directional gyro flown to equivalent latitude in the opposite hemisphere. Error experienced at this lat compared to original is

Answer 3

Doubled

Question 4

For accurate alt measurements, number of channels a gps receiver needs is

Answer 4

4

Question 5

The min number of satellites required to eliminate gps receiver clock error is

Answer 5

4

Question 6

Most significant gps error is caused by

Answer 6

The ionosphere

Question 7

Min number of satellites needed for accurate 3D gps fix is

Answer 7

4

Question 8

Use of pseudo random code allows

Answer 8

Each satellite to transmit on the same frequency

Question 9

GDOP (geometric dilution of precision) caused by

Answer 9

Small distance between satellites

Question 10

GPS works on the principle of

Answer 10

Time difference

Question 11

Gps pseudo random code allows for

Answer 11

Low power operation

Question 12

GPS receivers can reduce the magnitude of GDOP error

Answer 12

By selecting the four best spaced satellites available

Question 13

In relation to background radio noise, gps signal is

Answer 13

Weaker