Garmin G1000 NXi Pilot’s Guide for the Cessna Nav III 190-02177-00 Rev. ASYSTEMOVERVIEWFLIGHTINSTRUMENTSEISAUDIO PANEL& CNSFLIGHTMANAGEMENTHAZARDAVOIDANCEAFCSADDITIONALFEATURESAPPENDICESINDEX252HAZARD AVOIDANCEWEATHER PRODUCT OVERVIEWThe following is an overview of data link weather products the system can display.NEXRAD (SIRIUSXM)NOTE: Datalink weather radar information cannot be displayed at the same time as relative terrain, echotops, icing, or turbulence data.The National Weather Service (NWS) operates the WSR-88D, or NEXRAD (NEXt-generation RADar)system, an extensive network of 156 high-resolution Doppler radar systems. The NEXRAD network providescentralized meteorological information for the continental United States and selected overseas locations. Themaximum range of a single NEXRAD site is 250 nm.Individual NEXRAD sites supply the network with radar images, and the images from each radar site mayarrive at the network at different rates and times. Periodically, the weather data provider compiles the availableindividual site images from the network to form a composite image, and assigns a single time to indicate whenit created the image. This image becomes the NEXRAD weather product. Individual images--gathered fromeach NEXRAD site--differ in age, and are always older than the displayed NEXRAD weather product age. Thedata provider then sends the NEXRAD data to the SiriusXM Weather service, whose satellites transmit thisinformation during the next designated broadcast time for the NEXRAD weather product.Because of the time required to detect, assemble, and distribute the NEXRAD weather product, the displayedweather information contained within the product may be significantly older than the current radar synopsisand may not depict the current weather conditions. The NEXRAD weather product should never be used as abasis for maneuvering in, near, or around areas of hazardous weather regardless of the information it contains.Figure 6-7 NEXRAD Weather Product on the Weather Data Link (XM) Page
