190-02177-00 Rev. A Garmin G1000 NXi Pilot’s Guide for Cessna Nav IIISYSTEMOVERVIEW FLIGHTINSTRUMENTS EIS AUDIO PANEL& CNS FLIGHTMANAGEMENT HAZARDAVOIDANCE AFCS ADDITIONALFEATURES APPENDICES INDEX21SYSTEM OVERVIEW• GPS Satellite Signal StrengthsThe GPS Status Page can be helpful in troubleshooting weak (or missing) signal levels due to poor satellitecoverage or installation problems. As the GPS receiver locks onto satellites, a signal strength bar is displayedfor each satellite in view, with the appropriate satellite PRN number (01-32 or 120-138 for WAAS) beloweach 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- Hollow bar—Receiver has found the satellite and is collecting data- Light Cyan bar—Receiver has collected the necessary data and the satellite signal can be used- Green bar—Satellite is being used for the GPS solution- Checkered bar—Receiver has excluded the satellite (Fault Detection and Exclusion)- “D” indication—Denotes the satellite is being used as part of the differential computationsEach satellite has a 30-second data transmission that must be collected (signal strength bar is hollow) beforethe satellite may be used for navigation (signal strength bar becomes solid).
