Intensity - Honeywell KMD 250 Pilot's Manual

Multi-function display/gps
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Value Added Service Weather Products
5. The resolution of NEXRAD XM data is 2 km. Thus, when zoomed in
on the display, each square block is 2 km on a side. The intensity level
reflected by the square will be the highest level sampled within the 2 km
area.

INTENSITY

Precipitation intensity is depicted using colors as follows:
Green
Light
Yellow
Moderate
Red
Heavy
Magenta
Extreme
The NEXRAD dBz levels, descriptions and colors are consistent with
FAA guidelines.
Moving the joystick and pressing the LEGEND Softkey will display the
NEXRAD legend as shown in Figure 2-3 (FIS VDL) and 2-4 (XM WX).
The column labeled dBz is a measure of the radar echo intensity.
The strength of a radar return signal typically varies as a function of
distance (i.e., weaker from distant targets, stronger from those nearby)
and the object size.
Many weather sources avail-
able on the internet use color
coding that is different than
the KMD 250 color coding.
The dBz and intensity level
can be used to compare
intensity levels between dif-
ferent sources of NEXRAD
information
since
internet weather providers will
include a legend with dBz
values indicated.
No Data, as shown in the
legend, indicates the lack of
coverage for reasons dis-
cussed previously.
Rev 4 Aug/2007
Level 1
15-30 dBz (10-30 dBz for XM)
Level 2
30-40 dBz
Level 3-4
40-50 dBz
Level 5-8
50+ dBz
many
2-16
Figure 2-3
Figure 2-4
KMD 250 Pilot's Guide

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