Global Navigation Satellite Systems: DGCA Air Navigation questions

Question 1

The NAVSTAR/GPS control segment comprises:

Accepted Answer

A master control station, a back-up control station and five monitoring stations

Answer

The space segment, the user segment and the ground segment

Answer

A ground segment and the INMARSAT geostationary satellites

Answer

A master control station, a back-up control station, five monitoring stations and the INMARSAT geostationary satellites

Question 2

The NAVSTAR/GPS operational constellation comprises how many satellites?

Accepted Answer

24

Answer

12

Answer

21

Answer

30

Question 3

The most accurate fixing information will be obtained from:

Accepted Answer

One satellite directly overhead and 3 spaced 120° apart close to the horizon

Answer

Four satellites spaced 90° apart at 30° above the visual horizon

Answer

One satellite close to the horizon and 3 equally at 60° above the horizon

Answer

One satellite directly overhead and 3 equally spaced at 60° above the horizon

Question 4

The most significant error of GNSS is:

Accepted Answer

Ionospheric propagation

Answer

PDOP

Answer

Receiver clock error

Answer

Ephemeris error

Question 5

The frequency available to non-authorized civilian users of NAVSTAR/GPS is:

Accepted Answer

1575.42 MHz

Answer

1227.6 MHz

Answer

1602 MHz

Answer

1246 MHz

17 more questions in this chapter, free with an account