4-42Garmin G500H Pilot’s Guide 190-01150-02 Rev. JForewordSec 1SystemSec 2PFDSec 3MFDSec 4HazardAvoidanceSec 5AdditionalFeaturesSec 6Annun.& AlertsSec 7SymbolsSec 8GlossaryAppendix AAppendix BIndex4.7 XM WX Satellite Weather (Optional)The primary map for viewing XM WX Satellite Weather data are the WeatherData Link Pages in the Map Page Group. These are the only GDU 620 mapdisplays capable of all available XM WX Satellite weather products. The XM WXSatellite Weather pages may be oriented to either Track Up or North Up.4.7.1 Using XM WX Satellite Weather ProductsWhen a weather product is active on the Weather Data Link Page or theNavigation Map Page, the age of the data is displayed on the screen. The age ofthe product is based on the time difference between when the data was assembledon the ground and the current GPS time. Weather products are refreshed atspecific intervals (defined in the Refresh Rate column).If a weather product is not received within the 30, 60, 90, or 120 minuteExpiration Time intervals, the data is considered expired and is removed fromthe display. This ensures that the displayed data is consistent with what iscurrently being broadcast by XM WX Satellite Radio services. If more than halfof the expiration time has elapsed from the time the data is received, the color ofthe product age displayed changes to yellow.
