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Garmin aera 795/796 Pilot’s Guide
190-01194-00 Rev. C
87
Hazard Avoidance
Overview GPS Navigation Flight Planning Hazard Avoidance Additional Features Appendices Index
•NEXRADbasereectivityissampledattheminimumantennaelevationangle.An
individual NEXRAD site cannot depict high altitude storms at close ranges, and
has no information about storms directly over the site.
•Radarcoverageonlyextendsto55°N.
•Anyprecipitationdisplayedbetween52°Nand55°Nisunknown.
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.
NEXRAD Data
RADAR Legend
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.
RADAR Legend
Satellite Mosaic/Cloud Tops Data