GNSS Ground Course

Select the correct statement:

• GPS is one example of a GNSS

• GNSS is a different name for GPS

• GNSS is the military version of GPS

• GNSS is a type of GPS

GPS has the following three major segments:

• GPS, GNSS and User

• Airborne, Ground and User

• Space, Control and User

• Civil, Military and Space

The satellite segment consists of a constellation of:

• At least 24 Satellites plus 1 operational spare, in 6 orbital planes

• At least 24 Satellites plus 3 as operational spares, in 6 orbital planes

• At least 24 Satellites including 3 operational spares, in 8 orbital planes

• At least 24 Satellites including 3 operational spares, in 8 orbital planes

Every satellite transmits continuously: (select all that apply)

• Using the same two L-Band frequencies as other GPS satellites

• On different frequencies from other satellites

• On L1 for coarse/acquisition codes (civilian) and L2 for precision ranging codes (military)

Every satellite transmission includes the following navigation message data: (select all that apply)

• Satellite Ephemeris and Almanac data

• System maintenance/health status

• GPS time reference and clock corrections

GPS receivers can distinguish between individual satellites using:

• Different frequencies for each satellite

• Almanac data of the satellites position in space

• Directional modulation

• Identifying the pseudo-random code unique to each satellite

The function of the control segment in Colorado Springs, USA is:

• To track, monitor and manage all GNSS satellites

• To track, monitor and manage all GPS satellites

• For military use only

• For civilian use only

The User segment consists of:

• An airborne receiver measuring the distance to the satellites

• A two-way UHF receiver

• A two-way UHF receiver

• Equipment receiving, decoding and processing the GPS satellite codes and message data

In order to provide a 3D navigation solution an aircraft’s GPS receiver must have:

• A minimum of four satellites in view

• A minimum of five, or if barometric aiding is available four satellites in view

• A minimum of two satellites in view

• Three satellites in view for a three dimensional solution

Select the correct statement: (select all that apply)

• Each GPS receiver contains a very accurate atomic clock

• A signal transmitted from the aircraft unit triggers a return signal from the satellites

• Triangulation is the basis of GPS navigation