Garmin aera 796 Pilot's Guide - Page 21

Overview GPS Navigation Flight Planning Hazard Avoidance Additional Features Overview Viewing the GPS status: From the Main Menu, touch Tools > GPS Status. ACQUIRING SATELLITES The bars located at the top of the screen indicate the GPS signal strength. When the receiver is in the process of acquiring enough satellite signals for navigation, the receiver uses satellite orbital data (collected continuously from the satellites) 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 satellites have been acquired for computing a solution. When the receiver is in the process of acquiring a 3D differential GPS solution, '3D GPS Location' is indicated as the solution until the 3D differential fix has finished acquisition. SATELLITE INFORMATION Satellites currently in view are shown at their respective positions on a satellite constellation diagram. The outer circle of the constellation diagram represents the horizon, the inner circle represents 45° above the horizon, and the center point shows the position directly overhead. Each satellite is represented by a square containing the Pseudo-Random Noise (PRN) number (i.e., satellite identification number). GPS Status can be helpful in troubleshooting weak (or missing) signal levels due to poor satellite coverage or installation problems. As the GPS receiver locks onto satellites, a signal strength bar is displayed for each satellite in view, with the appropriate satellite PRN number (01-32 or 33-64 for WAAS) below each bar. The progress of satellite acquisition is shown in three stages, as indicated by signal bar appearance: - No bar-Receiver is looking for the indicated satellite - Gray bar-Receiver has collected the necessary data and the satellite signal can be used - Green bar-Satellite is being used for the GPS solution Appendices Index 190-01194-00 Rev. A Garmin aera 795/796 Pilot's Guide 7