Garmin aera 500 Series Pilot’s Guide 190-01117-02 Rev. C6OverviewOverviewGPS NavigationFlight PlanningHazard AvoidanceAdditional FeaturesAppendicesIndexWhen the receiver is in the process of acquiring enough satellite signals fornavigation, the receiver uses satellite orbital data (collected continuously from thesatellites) and last known position to determine the satellites that should be in view.‘Acquiring Satellites’ is indicated as the solution until a sufficient number of satelliteshave been acquired for computing a solution.When the receiver is in the process of acquiring a 3D differential GPS solution, ‘3DGPS Location’ is indicated as the solution until the 3D differential fix has finishedacquisition.SATELLITE INFORMATIONSatellites currently in view are shown at their respective positions on a satelliteconstellation diagram. The outer circle of the constellation diagram represents thehorizon, the inner circle represents 45° above the horizon, and the center point showsthe position directly overhead. Each satellite is represented by a square containing thePseudo-Random Noise (PRN) number (i.e., satellite identification number).GPS Status can be helpful in troubleshooting weak (or missing) signal levelsdue to poor satellite coverage or installation problems. As the GPS receiver locksonto satellites, a signal strength bar is displayed for each satellite in view, with theappropriate satellite PRN number (01-32 or 33-64 for WAAS) below each bar. Theprogress of satellite acquisition is shown in three stages, as indicated by signal barappearance:- No bar—Receiver is looking for the indicated satellite- Gray bar—Receiver has collected the necessary data and the satellite signal canbe used- Green bar—Satellite is being used for the GPS solution
