M13-4 GPS/GNSS

What type of data is contained in Block I of the GPS navigation message?

• Ephemeris prediction parameters

• Clock correction parameters

• Approximation of the atmospheric delay

• Almanac data

What does AOD indicate in Block I of the GPS navigation message?

• Approximation of the atmospheric delay

• Time since the last navigation upload

• Clock correction parameters

• Ephemeris prediction parameters

What type of data is contained in Block III of the GPS navigation message?

• Almanac data

• Clock correction parameters

• Approximation of the atmospheric delay

• Ephemeris prediction parameters

What is the primary factor for the safety of a navigation system according to the text?

• Accuracy

• Availability

• Continuity

• Integrity

Tags

NGSS.HS-ETS1-3

What does DOP stand for in the context of GPS accuracy?

• Differential of Precision

• Dilution of Precision

• Direction of Position

• Distance of Position

What is the minimum percentage of time that the GPS SPS is mandated to be available according to the 1996 Federal Radio navigation Plan?

• 99.85%

• 95%

• 98%

• 99%

What does RAIM stand for in the context of GPS navigation?

• Remote Access and Integrity Monitoring

• Rapid Assessment of Integrity Monitoring

• Receiver Autonomous Integrity Monitoring

• Radio Aided Integrity Monitoring

What is the primary purpose of Differential GPS?

• To improve measurement precision by using differential methods

• To provide precise positioning service for military users

• To enhance the availability of GPS signals

• To monitor the integrity of GPS satellites

Tags

NGSS.HS-PS4-5

Why is there a need to have reception from 5 satellites to use GPS in aviation?

• To obtain height information as well as lateral position

• To detect anomalies in Space Vehicles used the navigation solution

• Without the fifth satellite only a poor GDOP can be achieved.

What mode does the GPSSU enter when it has decoded ephemeris data to compute a navigation solution?

• Navigation mode

• Initialization mode

• Self-Test mode

• Acquisition mode