Which of the following lists all the parameters that can be determined by a GPS receiver tracking signals from 4 different satellites?

Which of the following lists all the parameters that can be determined by a GPS receiver tracking signals from 4 different satellites?

• A. Latitude and longitude.
• B. Latitude, longitude and time.
• C. Latitude, longitude and altitude.
• D. Latitude, longitude, altitude and time.

Answer: (D)

A GPS receiver that is tracking signals from four different satellites can determine multiple parameters, which is why the choice of latitude, longitude, altitude, and time is the correct one. When a GPS receiver listens to signals from satellites, it uses the time it takes for the signals to reach the receiver to calculate its distance from each satellite. By processing signals from at least four satellites, the receiver is able to pinpoint its position in three-dimensional space through triangulation. This allows the GPS to determine the latitude and longitude, which indicate its location on the Earth's surface. Additionally, the geometry of tracking four satellites enables the receiver to calculate altitude, giving a complete three-dimensional position. The fourth satellite is crucial because it allows the receiver to accurately determine the time offset between the satellite's atomic clocks and the receiver’s internal clock, which is essential for improving positional accuracy and reliability. Thus, the combination of latitude, longitude, altitude, and time from four satellites gives the most comprehensive and precise information about the receiver’s position.

A GPS receiver that is tracking signals from four different satellites can determine multiple parameters, which is why the choice of latitude, longitude, altitude, and time is the correct one.

When a GPS receiver listens to signals from satellites, it uses the time it takes for the signals to reach the receiver to calculate its distance from each satellite. By processing signals from at least four satellites, the receiver is able to pinpoint its position in three-dimensional space through triangulation. This allows the GPS to determine the latitude and longitude, which indicate its location on the Earth's surface.

Additionally, the geometry of tracking four satellites enables the receiver to calculate altitude, giving a complete three-dimensional position. The fourth satellite is crucial because it allows the receiver to accurately determine the time offset between the satellite's atomic clocks and the receiver’s internal clock, which is essential for improving positional accuracy and reliability.

Thus, the combination of latitude, longitude, altitude, and time from four satellites gives the most comprehensive and precise information about the receiver’s position.