Garmin G3X Pilots Guide - Page 198

Overview System Hazard Avoidance NEXRAD Intensity Colors are used to identify the different NEXRAD echo intensities (reflectivity) measured in dBZ (decibels of Z). "Reflectivity" (designated by the letter Z) is the amount of transmitted power returned to the radar receiver. The dBZ values increase as returned signal strength increases. Precipitation intensity is displayed using colors corresponding to the dBZ values. Instruments Flight EIS CNS Interface GPS Navigation Flight Planning RADAR Legend NEXRAD Data SATELLITE MOSAIC Satellite Mosaic displays infrared composite images of cloud cover taken by geostationary weather satellites. The Satellite Mosaic provides up to seven levels of cloud cover. Hazard Avoidance Additional Features Integrated Autopilot Annun/Alerts Appendix RADAR Legend Satellite Mosaic/Cloud Tops Data ECHO TOPS Echo Tops are derived from NEXRAD radar and indicate the highest altitude at which precipitation is falling. Echo Tops at or above the altitude you select are displayed, in 5,000 foot increments up to 70,000 ft. Echo Tops can be helpful in determining the severity of thunderstorms. 180 Garmin G3X Pilot's Guide 190-01115-00 Rev. F Index