XGPS170
3
A Note on ADS-B
ing with your device
for more information.
The ADS-B network provides weather data as
well as a growing amount of air traffic information.
However, ADS-B is an emerging system which still
has coverage gaps. The FAA’s intended plan is
to have coast-to-coast coverage across the con-
tinental United States by the end of 2013. The cur-
rent coverage map is available on the FAA website
at http://www.faa.gov/nextgen.
Weather.
The ADS-B ground system broadcasts
regional NEXRAD weather information every 2.5
minutes and continental NEXRAD information ev-
ery 15 minutes. Both weather broadcasts are re-
ceived by the XGPS170.
Traffic.
The XGPS170 will also receive ADS-B
traffic information from both the ADS-B ground
system and from other aircraft operating 978 MHz
ADS-B Out transponders. Traffic information in-
cludes position, heading, speed and altitude for
each aircraft.
However, it is important to know that traffic infor-
mation offered through the ADS-B ground system
is only broadcast in response to a signal from an
ADS-B Out transponder. Since not all aircraft are
equipped with ADS-B transponders at this point,
please be aware that the traffic information provid-
