Garmin G1000H Pilot's Manual page 304
Integrated flight deck pilot’s guide for the bell 407gx
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Also See for G1000H:
- Cockpit reference manual (136 pages) ,
- Cockpit reference manual (158 pages)
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HAZARD AVOIDANCE
neXRaD l
imitatiOns
NEXRAD radar images may have certain limitations:
• NEXRAD base reflectivity does not provide sufficient information to determine cloud layers or precipitation
characteristics (wet hail vs. rain). For example, it is not possible to distinguish between wet snow, wet
hail, and rain.
• NEXRAD base reflectivity is sampled at the minimum antenna elevation angle. An individual NEXRAD
site cannot depict high altitude storms at close ranges. It has no information about storms directly over
the site.
• When zoomed in to a range of 30 nm, each square block on the display represents an area of four square
kilometers. The intensity level reflected by each square represents the
sampled within the area (Figure 6-12).
Block Area is 4 km
2
The following may cause abnormalities in displayed NEXRAD radar images:
• Ground clutter
• Strobes and spurious radar data
• Sun strobes (when the radar antenna points directly at the sun)
• Interference from buildings or mountains, which may cause shadows
• Metallic dust from military aircraft, which can cause alterations in radar scans
292
Figure 6-12 NEXRAD Data - Zoomed
Garmin G1000H
Pilot's Guide for the Bell 407GX
™
highest
level of NEXRAD data
190-01255-00 Rev. A
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