Quiz about M13-4 GPS/GNSS

Question 1

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

Accepted Answer

Clock correction parameters

Answer

Ephemeris prediction parameters

Answer

Approximation of the atmospheric delay

Answer

Almanac data

Question 2

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

Accepted Answer

Time since the last navigation upload

Answer

Approximation of the atmospheric delay

Answer

Clock correction parameters

Answer

Ephemeris prediction parameters

Question 3

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

Accepted Answer

Almanac data

Answer

Clock correction parameters

Answer

Approximation of the atmospheric delay

Answer

Ephemeris prediction parameters

Question 4

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

Accepted Answer

Integrity

Answer

Accuracy

Answer

Availability

Answer

Continuity

Question 5

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

Accepted Answer

Dilution of Precision

Answer

Differential of Precision

Answer

Direction of Position

Answer

Distance of Position

Question 6

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

Accepted Answer

99.85%

Answer

95%

Answer

98%

Answer

99%

Question 7

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

Accepted Answer

Receiver Autonomous Integrity Monitoring

Answer

Remote Access and Integrity Monitoring

Answer

Rapid Assessment of Integrity Monitoring

Answer

Radio Aided Integrity Monitoring

Question 8

What is the primary purpose of Differential GPS?

Accepted Answer

To improve measurement precision by using differential methods

Answer

To provide precise positioning service for military users

Answer

To enhance the availability of GPS signals

Answer

To monitor the integrity of GPS satellites

Question 9

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

Accepted Answer

To detect anomalies in Space Vehicles used the navigation solution

Answer

To obtain height information as well as lateral position

Answer

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

Question 10

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

Accepted Answer

Navigation mode

Answer

Initialization mode

Answer

Self-Test mode

Answer

Acquisition mode

Question 11

What is the purpose of the 'Pseudorange' in GPS technology?

Accepted Answer

To measure the distance between the GPS receiver and the satellite

Answer

To determine the speed of the GPS receiver

Answer

To calculate the time delay in GPS signal transmission

Answer

To estimate the position of the GPS receiver

Question 12

What does the 'Ephemeris' data in a GPS signal provide?

Accepted Answer

Information about the GPS satellite's precise orbital location

Answer

Information about the GPS satellite's health status

Answer

Information about the atmospheric conditions affecting the GPS signal

Answer

Information about the GPS satellite's clock correction parameters

Question 13

What is the purpose of the 'Clock Correction Parameters' in the GPS navigation message?

Accepted Answer

To correct the GPS satellite's atomic clock

Answer

To correct the time delay in GPS signal transmission

Answer

To correct the GPS receiver's internal clock

Answer

To correct the time difference between the GPS receiver and the satellite

Question 14

What is the best position for satellites for good GDOP?

Accepted Answer

Evenly spread out around the receiver

Answer

Clustered in one area around the receiver

Answer

Randomly scattered around the receiver

Answer

Concentrated in a single line around the receiver

Question 15

What is the basic concept behind GPS?

Accepted Answer

Measuring the distance from a group of satellites in space

Answer

Measuring the color of satellites in space

Answer

Measuring the temperature of satellites in space

Answer

Measuring the speed of satellites in space

Question 16

How many satellite ranges are needed to unambiguously locate a position?

Accepted Answer

Four

Answer

Three

Answer

Two

Answer

One

Question 17

What is the purpose of the Master Control Station in Colorado Springs?

Accepted Answer

To control the orbits and clocks of GPS satellites

Answer

To monitor the health of GPS receivers

Answer

To transmit corrections to GPS satellites

Answer

To measure the altitude of GPS satellites

Question 18

How many GPS satellites are in orbit?

Accepted Answer

24

Answer

18

Answer

30

Answer

12

Question 19

What is the function of the GPS receiver in an aircraft?

Accepted Answer

To convert satellite signals into position, time, and velocity

Answer

To generate the navigation message

Answer

To control the orbits of GPS satellites

Answer

To transmit corrections to GPS satellites

Question 20

What is the frequency of the L1 signal transmitted by GPS satellites?

Accepted Answer

1575.42 MHz

Answer

50 bps

Answer

10.23 MHz

Answer

1227.60 MHz

Question 21

What type of GPS antenna design is commonly used in modern aircraft?

Accepted Answer

Top mounted active antenna

Answer

Side mounted low profile antenna

Answer

Rear mounted omnidirectional antenna

Answer

Bottom mounted passive antenna

Question 22

What is the frequency of the P/Y-code?

Accepted Answer

1227.60 MHz

Answer

1575.42 MHz

Answer

10.23 MHz

Answer

50 bps

Question 23

What type of data is included in the navigation message transmitted by GPS satellites?

Accepted Answer

Status of the space vehicle

Answer

Weather information

Answer

Satellite images

Answer

Radio frequencies

Question 24

What is the function of the almanac data in a GPS system?

Accepted Answer

To provide information about the orbits of all GPS satellites

Answer

To provide information about the health of the satellite

Answer

To provide information about the current date and time

Answer

To provide information about the location of the GPS receiver

Question 25

What is the function of the atomic clocks in GPS satellites?

Select all correct answers

Accepted Answer

To provide precise timekeeping for the satellite's onboard computer

Accepted Answer

To provide the time stamp for the navigation message

Accepted Answer

To provide the frequency for the GPS signals

Answer

To provide provide synronisation for communication from user segments

M13-4 GPS/GNSS

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