GNSS/GPS

What is the minimum number of satellite required by a GPS in order to obtain a three dimensional fix?

• A 3.
• B 5.
• C 4.
• D 6.

In satellite-Assisted Navigation system (GNSS/GPS) a position line is obtained by:

• AThe aircraft’s receiver measuring phase angle of the signal received from a satellite in a known position.
• BTiming the period that is taken for a transmission from the aircraft’s transmitter/receiver to reach and return from a satellite in a known position.
• CTiming the period that is taken for a satellite’s transmission to reach the aircraft’s receiver.
• D The aircraft’s receiver measuring the time difference between signals received from a minimum number of satellites.

In which frequency band do satellite-assisted navigation system (GNSS/GPS) provide position information that is available to civil aircraft?

• A SHF.
• B UHF.
• C EHF.
• DVHF.