Tag Archives: GPS

The influence of the ionosphere on the accuracy of the satellite navigation system NAVSTAR/GPS is:

A: only significant if the satellites are located at a small elevation angle above the horizon
B: minimised by computing the average of all signals
C: minimised by the receiver using a model of the atmosphere and comparing signals transmitted by the satellites
D: negligible









Answer: C

One of the tasks of the control segment of the satellite navigation system NAVSTAR/GPS is to:

A: manipulate the signals of selected satellites to reduce the precision of the position fix
B: manufacture and launch the satellites
C: monitor the status of the satellites
D: grant and monitor user authorisations









Answer: C

The required 24 NAVSTAR/GPS operational satellites are located on:

A: 4 orbital planes with 6 satellites in each plane
B: 3 orbital planes with 8 satellites in each plane
C: 6 orbital planes with 4 satellites in each plane
D: 6 orbital planes with 3 satellites in each plane plus 6 reserve satellites positioned in a geostationary orbital plane









Answer: C

Almanac data stored in the receiver of the satellite navigation system NAVSTAR/GPS is used for the:

A: recognition whether Selective Availability (SA) is operative
B: fast identification of received signals coming from visible satellites
C: assignment of received PRN-codes (Pseudo Random Noise) to the appropriate satellite
D: correction of receiver clock error









Answer: B

Which of the following, if any, is a prerequisite if a receiver of a NAVSTAR/GPS satellite navigation system is to be used in combination with a multi sensor system?

A: The RAIM-function of the GPS receiver must be able to monitor all prescribed navigation systems
B: The prescribed IFR-equipment must be in working correctly and the navigation information continuously displayed
C: The prescribed IFR-equipment must be installed and operational
D: Multi-sensor systems are not certificated for flights under IFR conditions









Answer: C