Garmin 010-00730-00 Manual De Usuario

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GXM 40 Owner’s Manual 

Appendix
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 represented by the dBZ values listed 
in the dBZ Values/Precipitation Table.
Display
Rain
Display 
Snow
dBZ
Rain
(inches per 
hour)
Snow
(inches per 
hour)
Remarks
Rain
Snow
≤ -10 0.00 in.
0.00 in.
-5
0.00 in.
trace
0
0.00 in.
trace–0.05 in.
Very Light
5
0.00 in.
trace–0.10 in.
Light
10
0.00 in.–trace 0.01 in.
Light
Light
15
0.01 in.
0.1–0.2 in.
Light
Light
20
0.02 in.
0.2–0.3 in.
Light
Light
25
0.05 in.
0.3–0.5 in.
Light
Light–Moderate
30
0.09 in.
0.5–0.7 in.
Light–Moderate Moderate
35
0.24 in.
0.7–1.0 in.
Moderate
Heavy
40
0.48 in.
1 in.+ or sleet Heavy
Heavy
45
1.25 in.
1 in.+ or sleet Heavy
Heavy
50
2.5 in.
sleet
Intense
55
5.7 in.
sleet
Extreme
55+
12.7 in.
Extreme
dBZ Values/Precipitation Table