Hazard Awareness190-02207-02 Rev. 1 GPS 175/GNX 375 Pilot’s Guide 5-115.4.3 FIS-B NEXRADWARNINGNEVER USE NEXRAD WEATHER FOR MANEUVERING IN, NEAR, ORAROUND AREAS OF HAZARDOUS WEATHER. NEXRAD IMAGES ARESNAPSHOTS OF PAST WEATHER DATA. THEY ARE NOT SAFE FOR USEAS REAL TIME DEPICTIONS OF NEARBY WEATHER ACTIVITY.NEXRAD weather radar displays a mosaic of precipitation data, colored according toreflectivity. Composite reflectivity images depict the highest radar energy receivedfrom multiple antenna tilt angles at various altitudes. Base reflectivity images depictradar returns from the lowest antenna tilt angle.The precipitation intensity level reflected by each pixel represents the highest level ofcomposite radar reflectivity data sampled in that location.RADAR DATA ANIMATIONSA clear understanding of ground-based Doppler weather radar capabilities willallow you to interpret the NEXRAD weather imagery in the safest way possible.The National Oceanic and Atmospheric Administration hosts a description of thetechnology on its website: https://www.weather.gov/jetstream/doppler_introCONUS NEXRAD Regional NEXRADTo depict trending weather movements over time, an animationfunction stitches the last three to six received radar images togetherin sequence, from oldest to newest, and replays them on acontinuous loop.Play and stop controls are active when three or more NEXRAD imagesare available for playback.
