GNSS

#4. The model of the earth used for NAVSTAR/GPS is:

• AWGS90
• BPZ90
• CWGS84
• DPZ84

#1. NAVSTAR/GPS operates in the band the receiver determines position by:

• AUHF, range position lines
• BUHF, secondary radar principles
• CSHF, secondary radar principles
• DSHF, range position lines

#2. The NAVSTAR/ GPS control segment comprises:

• Athe space segment, the user segment and the ground segment
• Ba ground segment and the INMARSAT geostationary satellites
• Ca master control station, a back-up control station and five monitoring stations
• Da master control station, a back-up control station, five monitoring stations and the INMARSAT geostationary satellites