Garmin GNX 375, Pilot'S Manual, Page: 181 / 244

Hazard Awareness
190-02207-02 Rev. B GPS 175/GNX 375 Pilot’s Guide 5-11
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.
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
•
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
Regional
•
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
Combined
•
Both CONUS and Regional NEXRAD images display
simultaneously
•
White hash mark indicates regional boundary
CONUS & Regional NEXRAD
Combined
Regional
Echo Block
Regional
Boundary
CONUS
Echo Block
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.
FIS-B NEXRAD does not
differentiate between liquid
and frozen precipitation types.
CONUS Combined Regional