Garmin GNC 355 Pilot's Manual page 216

Hazard Awareness
CONUS & REGIONAL NEXRAD
FIS-B NEXRAD is uplinked to the aircraft as two separate weather products:
CONUS and Regional NEXRAD. Both products display individually or simultaneously,
separated by a white hash-marked boundary, based on source selection.
Regional Regional
Echo Block Boundary
CONUS & Regional NEXRAD
Source options are selectable from the weather setup menu or the NEXRAD key at
the bottom left of the FIS-B Weather page. The key label changes to reflect the active
source.
CONUS
CONUS
Regional
Combined
5-12
CONUS
Echo Block
Combined
•
Large, low-resolution weather image for the entire
continental U.S.
•
Pixels are 7.5 min (7.5 nm = 13.89 km) wide by 5 min
(5 nm = 9.26 km) wide
•
High-resolution weather image with limited range, centered
around each broadcasting ground station
•
Pixels are 1.5 min (1.5 nm = 2.78 km) wide by 1 min
(1 nm = 1.852 km) tall
•
Each weather pixel varies with latitude. Above 60º latitude,
pixel block width doubles to 3 min/nm for regional maps
•
Both CONUS and Regional NEXRAD images display
simultaneously
•
White hash mark indicates regional boundary
Pilot's Guide
Depending on the locations of
received FIS-B ground stations,
Regional NEXRAD coverage can
extend as far as 250 nm around
an aircraft's position. Aircraft
flying at higher altitudes
typically receive data from more
ground stations than aircraft
flying at low altitudes.
Turbulence, Icing, Lightning,
and Cloud Tops are regional
with a rectangular border. Any
areas lacking data within the
border are masked.
FIS-B NEXRAD does not
differentiate between liquid and
frozen precipitation types.
Regional Combined
190-02488-01 Rev. B